Android example source code file (IntentFilter.java)
The IntentFilter.java Android example source code/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.content;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Set;
import android.net.Uri;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.PatternMatcher;
import android.util.AndroidException;
import android.util.Config;
import android.util.Log;
import android.util.Printer;
import com.android.internal.util.XmlUtils;
/**
* Structured description of Intent values to be matched. An IntentFilter can
* match against actions, categories, and data (either via its type, scheme,
* and/or path) in an Intent. It also includes a "priority" value which is
* used to order multiple matching filters.
*
* <p>IntentFilter objects are often created in XML as part of a package's
* {@link android.R.styleable#AndroidManifest AndroidManifest.xml} file,
* using {@link android.R.styleable#AndroidManifestIntentFilter intent-filter}
* tags.
*
* <p>There are three Intent characteristics you can filter on: the
* <em>action, data, and categories. For each of these
* characteristics you can provide
* multiple possible matching values (via {@link #addAction},
* {@link #addDataType}, {@link #addDataScheme} {@link #addDataAuthority},
* {@link #addDataPath}, and {@link #addCategory}, respectively).
* For actions, the field
* will not be tested if no values have been given (treating it as a wildcard);
* if no data characteristics are specified, however, then the filter will
* only match intents that contain no data.
*
* <p>The data characteristic is
* itself divided into three attributes: type, scheme, authority, and path.
* Any that are
* specified must match the contents of the Intent. If you specify a scheme
* but no type, only Intent that does not have a type (such as mailto:) will
* match; a content: URI will never match because they always have a MIME type
* that is supplied by their content provider. Specifying a type with no scheme
* has somewhat special meaning: it will match either an Intent with no URI
* field, or an Intent with a content: or file: URI. If you specify neither,
* then only an Intent with no data or type will match. To specify an authority,
* you must also specify one or more schemes that it is associated with.
* To specify a path, you also must specify both one or more authorities and
* one or more schemes it is associated with.
*
* <p>A match is based on the following rules. Note that
* for an IntentFilter to match an Intent, three conditions must hold:
* the <strong>action and category must match, and
* the data (both the <strong>data type and
* <strong>data scheme+authority+path if specified) must match.
*
* <p>Action matches if any of the given values match the
* Intent action, <em>or if no actions were specified in the filter.
*
* <p>Data Type matches if any of the given values match the
* Intent type. The Intent
* type is determined by calling {@link Intent#resolveType}. A wildcard can be
* used for the MIME sub-type, in both the Intent and IntentFilter, so that the
* type "audio/*" will match "audio/mpeg", "audio/aiff", "audio/*", etc.
* <em>Note that MIME type matching here is case sensitive, unlike
* formal RFC MIME types!</em> You should thus always use lower case letters
* for your MIME types.
*
* <p>Data Scheme matches if any of the given values match the
* Intent data's scheme.
* The Intent scheme is determined by calling {@link Intent#getData}
* and {@link android.net.Uri#getScheme} on that URI.
* <em>Note that scheme matching here is case sensitive, unlike
* formal RFC schemes!</em> You should thus always use lower case letters
* for your schemes.
*
* <p>Data Authority matches if any of the given values match
* the Intent's data authority <em>and one of the data scheme's in the filter
* has matched the Intent, <em>or no authories were supplied in the filter.
* The Intent authority is determined by calling
* {@link Intent#getData} and {@link android.net.Uri#getAuthority} on that URI.
* <em>Note that authority matching here is case sensitive, unlike
* formal RFC host names!</em> You should thus always use lower case letters
* for your authority.
*
* <p>Data Path matches if any of the given values match the
* Intent's data path <em>and both a scheme and authority in the filter
* has matched against the Intent, <em>or no paths were supplied in the
* filter. The Intent authority is determined by calling
* {@link Intent#getData} and {@link android.net.Uri#getPath} on that URI.
*
* <p>Categories match if all of the categories in
* the Intent match categories given in the filter. Extra categories in the
* filter that are not in the Intent will not cause the match to fail. Note
* that unlike the action, an IntentFilter with no categories
* will only match an Intent that does not have any categories.
*/
public class IntentFilter implements Parcelable {
private static final String SGLOB_STR = "sglob";
private static final String PREFIX_STR = "prefix";
private static final String LITERAL_STR = "literal";
private static final String PATH_STR = "path";
private static final String PORT_STR = "port";
private static final String HOST_STR = "host";
private static final String AUTH_STR = "auth";
private static final String SCHEME_STR = "scheme";
private static final String TYPE_STR = "type";
private static final String CAT_STR = "cat";
private static final String NAME_STR = "name";
private static final String ACTION_STR = "action";
/**
* The filter {@link #setPriority} value at which system high-priority
* receivers are placed; that is, receivers that should execute before
* application code. Applications should never use filters with this or
* higher priorities.
*
* @see #setPriority
*/
public static final int SYSTEM_HIGH_PRIORITY = 1000;
/**
* The filter {@link #setPriority} value at which system low-priority
* receivers are placed; that is, receivers that should execute after
* application code. Applications should never use filters with this or
* lower priorities.
*
* @see #setPriority
*/
public static final int SYSTEM_LOW_PRIORITY = -1000;
/**
* The part of a match constant that describes the category of match
* that occurred. May be either {@link #MATCH_CATEGORY_EMPTY},
* {@link #MATCH_CATEGORY_SCHEME}, {@link #MATCH_CATEGORY_HOST},
* {@link #MATCH_CATEGORY_PORT},
* {@link #MATCH_CATEGORY_PATH}, or {@link #MATCH_CATEGORY_TYPE}. Higher
* values indicate a better match.
*/
public static final int MATCH_CATEGORY_MASK = 0xfff0000;
/**
* The part of a match constant that applies a quality adjustment to the
* basic category of match. The value {@link #MATCH_ADJUSTMENT_NORMAL}
* is no adjustment; higher numbers than that improve the quality, while
* lower numbers reduce it.
*/
public static final int MATCH_ADJUSTMENT_MASK = 0x000ffff;
/**
* Quality adjustment applied to the category of match that signifies
* the default, base value; higher numbers improve the quality while
* lower numbers reduce it.
*/
public static final int MATCH_ADJUSTMENT_NORMAL = 0x8000;
/**
* The filter matched an intent that had no data specified.
*/
public static final int MATCH_CATEGORY_EMPTY = 0x0100000;
/**
* The filter matched an intent with the same data URI scheme.
*/
public static final int MATCH_CATEGORY_SCHEME = 0x0200000;
/**
* The filter matched an intent with the same data URI scheme and
* authority host.
*/
public static final int MATCH_CATEGORY_HOST = 0x0300000;
/**
* The filter matched an intent with the same data URI scheme and
* authority host and port.
*/
public static final int MATCH_CATEGORY_PORT = 0x0400000;
/**
* The filter matched an intent with the same data URI scheme,
* authority, and path.
*/
public static final int MATCH_CATEGORY_PATH = 0x0500000;
/**
* The filter matched an intent with the same data MIME type.
*/
public static final int MATCH_CATEGORY_TYPE = 0x0600000;
/**
* The filter didn't match due to different MIME types.
*/
public static final int NO_MATCH_TYPE = -1;
/**
* The filter didn't match due to different data URIs.
*/
public static final int NO_MATCH_DATA = -2;
/**
* The filter didn't match due to different actions.
*/
public static final int NO_MATCH_ACTION = -3;
/**
* The filter didn't match because it required one or more categories
* that were not in the Intent.
*/
public static final int NO_MATCH_CATEGORY = -4;
private int mPriority;
private final ArrayList<String> mActions;
private ArrayList<String> mCategories = null;
private ArrayList<String> mDataSchemes = null;
private ArrayList<AuthorityEntry> mDataAuthorities = null;
private ArrayList<PatternMatcher> mDataPaths = null;
private ArrayList<String> mDataTypes = null;
private boolean mHasPartialTypes = false;
// These functions are the start of more optimized code for managing
// the string sets... not yet implemented.
private static int findStringInSet(String[] set, String string,
int[] lengths, int lenPos) {
if (set == null) return -1;
final int N = lengths[lenPos];
for (int i=0; i<N; i++) {
if (set[i].equals(string)) return i;
}
return -1;
}
private static String[] addStringToSet(String[] set, String string,
int[] lengths, int lenPos) {
if (findStringInSet(set, string, lengths, lenPos) >= 0) return set;
if (set == null) {
set = new String[2];
set[0] = string;
lengths[lenPos] = 1;
return set;
}
final int N = lengths[lenPos];
if (N < set.length) {
set[N] = string;
lengths[lenPos] = N+1;
return set;
}
String[] newSet = new String[(N*3)/2 + 2];
System.arraycopy(set, 0, newSet, 0, N);
set = newSet;
set[N] = string;
lengths[lenPos] = N+1;
return set;
}
private static String[] removeStringFromSet(String[] set, String string,
int[] lengths, int lenPos) {
int pos = findStringInSet(set, string, lengths, lenPos);
if (pos < 0) return set;
final int N = lengths[lenPos];
if (N > (set.length/4)) {
int copyLen = N-(pos+1);
if (copyLen > 0) {
System.arraycopy(set, pos+1, set, pos, copyLen);
}
set[N-1] = null;
lengths[lenPos] = N-1;
return set;
}
String[] newSet = new String[set.length/3];
if (pos > 0) System.arraycopy(set, 0, newSet, 0, pos);
if ((pos+1) < N) System.arraycopy(set, pos+1, newSet, pos, N-(pos+1));
return newSet;
}
/**
* This exception is thrown when a given MIME type does not have a valid
* syntax.
*/
public static class MalformedMimeTypeException extends AndroidException {
public MalformedMimeTypeException() {
}
public MalformedMimeTypeException(String name) {
super(name);
}
};
/**
* Create a new IntentFilter instance with a specified action and MIME
* type, where you know the MIME type is correctly formatted. This catches
* the {@link MalformedMimeTypeException} exception that the constructor
* can call and turns it into a runtime exception.
*
* @param action The action to match, i.e. Intent.ACTION_VIEW.
* @param dataType The type to match, i.e. "vnd.android.cursor.dir/person".
*
* @return A new IntentFilter for the given action and type.
*
* @see #IntentFilter(String, String)
*/
public static IntentFilter create(String action, String dataType) {
try {
return new IntentFilter(action, dataType);
} catch (MalformedMimeTypeException e) {
throw new RuntimeException("Bad MIME type", e);
}
}
/**
* New empty IntentFilter.
*/
public IntentFilter() {
mPriority = 0;
mActions = new ArrayList<String>();
}
/**
* New IntentFilter that matches a single action with no data. If
* no data characteristics are subsequently specified, then the
* filter will only match intents that contain no data.
*
* @param action The action to match, i.e. Intent.ACTION_MAIN.
*/
public IntentFilter(String action) {
mPriority = 0;
mActions = new ArrayList<String>();
addAction(action);
}
/**
* New IntentFilter that matches a single action and data type.
*
* <p>Note: MIME type matching in the Android framework is
* case-sensitive, unlike formal RFC MIME types. As a result,
* you should always write your MIME types with lower case letters,
* and any MIME types you receive from outside of Android should be
* converted to lower case before supplying them here.</em>
*
* <p>Throws {@link MalformedMimeTypeException} if the given MIME type is
* not syntactically correct.
*
* @param action The action to match, i.e. Intent.ACTION_VIEW.
* @param dataType The type to match, i.e. "vnd.android.cursor.dir/person".
*
*/
public IntentFilter(String action, String dataType)
throws MalformedMimeTypeException {
mPriority = 0;
mActions = new ArrayList<String>();
addAction(action);
addDataType(dataType);
}
/**
* New IntentFilter containing a copy of an existing filter.
*
* @param o The original filter to copy.
*/
public IntentFilter(IntentFilter o) {
mPriority = o.mPriority;
mActions = new ArrayList<String>(o.mActions);
if (o.mCategories != null) {
mCategories = new ArrayList<String>(o.mCategories);
}
if (o.mDataTypes != null) {
mDataTypes = new ArrayList<String>(o.mDataTypes);
}
if (o.mDataSchemes != null) {
mDataSchemes = new ArrayList<String>(o.mDataSchemes);
}
if (o.mDataAuthorities != null) {
mDataAuthorities = new ArrayList<AuthorityEntry>(o.mDataAuthorities);
}
if (o.mDataPaths != null) {
mDataPaths = new ArrayList<PatternMatcher>(o.mDataPaths);
}
mHasPartialTypes = o.mHasPartialTypes;
}
/**
* Modify priority of this filter. The default priority is 0. Positive
* values will be before the default, lower values will be after it.
* Applications must use a value that is larger than
* {@link #SYSTEM_LOW_PRIORITY} and smaller than
* {@link #SYSTEM_HIGH_PRIORITY} .
*
* @param priority The new priority value.
*
* @see #getPriority
* @see #SYSTEM_LOW_PRIORITY
* @see #SYSTEM_HIGH_PRIORITY
*/
public final void setPriority(int priority) {
mPriority = priority;
}
/**
* Return the priority of this filter.
*
* @return The priority of the filter.
*
* @see #setPriority
*/
public final int getPriority() {
return mPriority;
}
/**
* Add a new Intent action to match against. If any actions are included
* in the filter, then an Intent's action must be one of those values for
* it to match. If no actions are included, the Intent action is ignored.
*
* @param action Name of the action to match, i.e. Intent.ACTION_VIEW.
*/
public final void addAction(String action) {
if (!mActions.contains(action)) {
mActions.add(action.intern());
}
}
/**
* Return the number of actions in the filter.
*/
public final int countActions() {
return mActions.size();
}
/**
* Return an action in the filter.
*/
public final String getAction(int index) {
return mActions.get(index);
}
/**
* Is the given action included in the filter? Note that if the filter
* does not include any actions, false will <em>always be returned.
*
* @param action The action to look for.
*
* @return True if the action is explicitly mentioned in the filter.
*/
public final boolean hasAction(String action) {
return mActions.contains(action);
}
/**
* Match this filter against an Intent's action. If the filter does not
* specify any actions, the match will always fail.
*
* @param action The desired action to look for.
*
* @return True if the action is listed in the filter or the filter does
* not specify any actions.
*/
public final boolean matchAction(String action) {
if (action == null || mActions == null || mActions.size() == 0) {
return false;
}
return mActions.contains(action);
}
/**
* Return an iterator over the filter's actions. If there are no actions,
* returns null.
*/
public final Iterator<String> actionsIterator() {
return mActions != null ? mActions.iterator() : null;
}
/**
* Add a new Intent data type to match against. If any types are
* included in the filter, then an Intent's data must be <em>either
* one of these types <em>or a matching scheme. If no data types
* are included, then an Intent will only match if it specifies no data.
*
* <p>Note: MIME type matching in the Android framework is
* case-sensitive, unlike formal RFC MIME types. As a result,
* you should always write your MIME types with lower case letters,
* and any MIME types you receive from outside of Android should be
* converted to lower case before supplying them here.</em>
*
* <p>Throws {@link MalformedMimeTypeException} if the given MIME type is
* not syntactically correct.
*
* @param type Name of the data type to match, i.e. "vnd.android.cursor.dir/person".
*
* @see #matchData
*/
public final void addDataType(String type)
throws MalformedMimeTypeException {
final int slashpos = type.indexOf('/');
final int typelen = type.length();
if (slashpos > 0 && typelen >= slashpos+2) {
if (mDataTypes == null) mDataTypes = new ArrayList<String>();
if (typelen == slashpos+2 && type.charAt(slashpos+1) == '*') {
String str = type.substring(0, slashpos);
if (!mDataTypes.contains(str)) {
mDataTypes.add(str.intern());
}
mHasPartialTypes = true;
} else {
if (!mDataTypes.contains(type)) {
mDataTypes.add(type.intern());
}
}
return;
}
throw new MalformedMimeTypeException(type);
}
/**
* Is the given data type included in the filter? Note that if the filter
* does not include any type, false will <em>always be returned.
*
* @param type The data type to look for.
*
* @return True if the type is explicitly mentioned in the filter.
*/
public final boolean hasDataType(String type) {
return mDataTypes != null && findMimeType(type);
}
/**
* Return the number of data types in the filter.
*/
public final int countDataTypes() {
return mDataTypes != null ? mDataTypes.size() : 0;
}
/**
* Return a data type in the filter.
*/
public final String getDataType(int index) {
return mDataTypes.get(index);
}
/**
* Return an iterator over the filter's data types.
*/
public final Iterator<String> typesIterator() {
return mDataTypes != null ? mDataTypes.iterator() : null;
}
/**
* Add a new Intent data scheme to match against. If any schemes are
* included in the filter, then an Intent's data must be <em>either
* one of these schemes <em>or a matching data type. If no schemes
* are included, then an Intent will match only if it includes no data.
*
* <p>Note: scheme matching in the Android framework is
* case-sensitive, unlike formal RFC schemes. As a result,
* you should always write your schemes with lower case letters,
* and any schemes you receive from outside of Android should be
* converted to lower case before supplying them here.</em>
*
* @param scheme Name of the scheme to match, i.e. "http".
*
* @see #matchData
*/
public final void addDataScheme(String scheme) {
if (mDataSchemes == null) mDataSchemes = new ArrayList<String>();
if (!mDataSchemes.contains(scheme)) {
mDataSchemes.add(scheme.intern());
}
}
/**
* Return the number of data schemes in the filter.
*/
public final int countDataSchemes() {
return mDataSchemes != null ? mDataSchemes.size() : 0;
}
/**
* Return a data scheme in the filter.
*/
public final String getDataScheme(int index) {
return mDataSchemes.get(index);
}
/**
* Is the given data scheme included in the filter? Note that if the
* filter does not include any scheme, false will <em>always be
* returned.
*
* @param scheme The data scheme to look for.
*
* @return True if the scheme is explicitly mentioned in the filter.
*/
public final boolean hasDataScheme(String scheme) {
return mDataSchemes != null && mDataSchemes.contains(scheme);
}
/**
* Return an iterator over the filter's data schemes.
*/
public final Iterator<String> schemesIterator() {
return mDataSchemes != null ? mDataSchemes.iterator() : null;
}
/**
* This is an entry for a single authority in the Iterator returned by
* {@link #authoritiesIterator()}.
*/
public final static class AuthorityEntry {
private final String mOrigHost;
private final String mHost;
private final boolean mWild;
private final int mPort;
public AuthorityEntry(String host, String port) {
mOrigHost = host;
mWild = host.length() > 0 && host.charAt(0) == '*';
mHost = mWild ? host.substring(1).intern() : host;
mPort = port != null ? Integer.parseInt(port) : -1;
}
AuthorityEntry(Parcel src) {
mOrigHost = src.readString();
mHost = src.readString();
mWild = src.readInt() != 0;
mPort = src.readInt();
}
void writeToParcel(Parcel dest) {
dest.writeString(mOrigHost);
dest.writeString(mHost);
dest.writeInt(mWild ? 1 : 0);
dest.writeInt(mPort);
}
public String getHost() {
return mOrigHost;
}
public int getPort() {
return mPort;
}
/**
* Determine whether this AuthorityEntry matches the given data Uri.
* <em>Note that this comparison is case-sensitive, unlike formal
* RFC host names. You thus should always normalize to lower-case.</em>
*
* @param data The Uri to match.
* @return Returns either {@link IntentFilter#NO_MATCH_DATA},
* {@link IntentFilter#MATCH_CATEGORY_PORT}, or
* {@link IntentFilter#MATCH_CATEGORY_HOST}.
*/
public int match(Uri data) {
String host = data.getHost();
if (host == null) {
return NO_MATCH_DATA;
}
if (Config.LOGV) Log.v("IntentFilter",
"Match host " + host + ": " + mHost);
if (mWild) {
if (host.length() < mHost.length()) {
return NO_MATCH_DATA;
}
host = host.substring(host.length()-mHost.length());
}
if (host.compareToIgnoreCase(mHost) != 0) {
return NO_MATCH_DATA;
}
if (mPort >= 0) {
if (mPort != data.getPort()) {
return NO_MATCH_DATA;
}
return MATCH_CATEGORY_PORT;
}
return MATCH_CATEGORY_HOST;
}
};
/**
* Add a new Intent data authority to match against. The filter must
* include one or more schemes (via {@link #addDataScheme}) for the
* authority to be considered. If any authorities are
* included in the filter, then an Intent's data must match one of
* them. If no authorities are included, then only the scheme must match.
*
* <p>Note: host name in the Android framework is
* case-sensitive, unlike formal RFC host names. As a result,
* you should always write your host names with lower case letters,
* and any host names you receive from outside of Android should be
* converted to lower case before supplying them here.</em>
*
* @param host The host part of the authority to match. May start with a
* single '*' to wildcard the front of the host name.
* @param port Optional port part of the authority to match. If null, any
* port is allowed.
*
* @see #matchData
* @see #addDataScheme
*/
public final void addDataAuthority(String host, String port) {
if (mDataAuthorities == null) mDataAuthorities =
new ArrayList<AuthorityEntry>();
if (port != null) port = port.intern();
mDataAuthorities.add(new AuthorityEntry(host.intern(), port));
}
/**
* Return the number of data authorities in the filter.
*/
public final int countDataAuthorities() {
return mDataAuthorities != null ? mDataAuthorities.size() : 0;
}
/**
* Return a data authority in the filter.
*/
public final AuthorityEntry getDataAuthority(int index) {
return mDataAuthorities.get(index);
}
/**
* Is the given data authority included in the filter? Note that if the
* filter does not include any authorities, false will <em>always be
* returned.
*
* @param data The data whose authority is being looked for.
*
* @return Returns true if the data string matches an authority listed in the
* filter.
*/
public final boolean hasDataAuthority(Uri data) {
return matchDataAuthority(data) >= 0;
}
/**
* Return an iterator over the filter's data authorities.
*/
public final Iterator<AuthorityEntry> authoritiesIterator() {
return mDataAuthorities != null ? mDataAuthorities.iterator() : null;
}
/**
* Add a new Intent data oath to match against. The filter must
* include one or more schemes (via {@link #addDataScheme}) <em>and
* one or more authorities (via {@link #addDataAuthority}) for the
* path to be considered. If any paths are
* included in the filter, then an Intent's data must match one of
* them. If no paths are included, then only the scheme/authority must
* match.
*
* <p>The path given here can either be a literal that must directly
* match or match against a prefix, or it can be a simple globbing pattern.
* If the latter, you can use '*' anywhere in the pattern to match zero
* or more instances of the previous character, '.' as a wildcard to match
* any character, and '\' to escape the next character.
*
* @param path Either a raw string that must exactly match the file
* path, or a simple pattern, depending on <var>type.
* @param type Determines how <var>path will be compared to
* determine a match: either {@link PatternMatcher#PATTERN_LITERAL},
* {@link PatternMatcher#PATTERN_PREFIX}, or
* {@link PatternMatcher#PATTERN_SIMPLE_GLOB}.
*
* @see #matchData
* @see #addDataScheme
* @see #addDataAuthority
*/
public final void addDataPath(String path, int type) {
if (mDataPaths == null) mDataPaths = new ArrayList<PatternMatcher>();
mDataPaths.add(new PatternMatcher(path.intern(), type));
}
/**
* Return the number of data paths in the filter.
*/
public final int countDataPaths() {
return mDataPaths != null ? mDataPaths.size() : 0;
}
/**
* Return a data path in the filter.
*/
public final PatternMatcher getDataPath(int index) {
return mDataPaths.get(index);
}
/**
* Is the given data path included in the filter? Note that if the
* filter does not include any paths, false will <em>always be
* returned.
*
* @param data The data path to look for. This is without the scheme
* prefix.
*
* @return True if the data string matches a path listed in the
* filter.
*/
public final boolean hasDataPath(String data) {
if (mDataPaths == null) {
return false;
}
Iterator<PatternMatcher> i = mDataPaths.iterator();
while (i.hasNext()) {
final PatternMatcher pe = i.next();
if (pe.match(data)) {
return true;
}
}
return false;
}
/**
* Return an iterator over the filter's data paths.
*/
public final Iterator<PatternMatcher> pathsIterator() {
return mDataPaths != null ? mDataPaths.iterator() : null;
}
/**
* Match this intent filter against the given Intent data. This ignores
* the data scheme -- unlike {@link #matchData}, the authority will match
* regardless of whether there is a matching scheme.
*
* @param data The data whose authority is being looked for.
*
* @return Returns either {@link #MATCH_CATEGORY_HOST},
* {@link #MATCH_CATEGORY_PORT}, {@link #NO_MATCH_DATA}.
*/
public final int matchDataAuthority(Uri data) {
if (mDataAuthorities == null) {
return NO_MATCH_DATA;
}
Iterator<AuthorityEntry> i = mDataAuthorities.iterator();
while (i.hasNext()) {
final AuthorityEntry ae = i.next();
int match = ae.match(data);
if (match >= 0) {
return match;
}
}
return NO_MATCH_DATA;
}
/**
* Match this filter against an Intent's data (type, scheme and path). If
* the filter does not specify any types and does not specify any
* schemes/paths, the match will only succeed if the intent does not
* also specify a type or data.
*
* <p>Be aware that to match against an authority, you must also specify a base
* scheme the authority is in. To match against a data path, both a scheme
* and authority must be specified. If the filter does not specify any
* types or schemes that it matches against, it is considered to be empty
* (any authority or data path given is ignored, as if it were empty as
* well).
*
* <p>Note: MIME type, Uri scheme, and host name matching in the
* Android framework is case-sensitive, unlike the formal RFC definitions.
* As a result, you should always write these elements with lower case letters,
* and normalize any MIME types or Uris you receive from
* outside of Android to ensure these elements are lower case before
* supplying them here.</em>
*
* @param type The desired data type to look for, as returned by
* Intent.resolveType().
* @param scheme The desired data scheme to look for, as returned by
* Intent.getScheme().
* @param data The full data string to match against, as supplied in
* Intent.data.
*
* @return Returns either a valid match constant (a combination of
* {@link #MATCH_CATEGORY_MASK} and {@link #MATCH_ADJUSTMENT_MASK}),
* or one of the error codes {@link #NO_MATCH_TYPE} if the type didn't match
* or {@link #NO_MATCH_DATA} if the scheme/path didn't match.
*
* @see #match
*/
public final int matchData(String type, String scheme, Uri data) {
final ArrayList<String> types = mDataTypes;
final ArrayList<String> schemes = mDataSchemes;
final ArrayList<AuthorityEntry> authorities = mDataAuthorities;
final ArrayList<PatternMatcher> paths = mDataPaths;
int match = MATCH_CATEGORY_EMPTY;
if (types == null && schemes == null) {
return ((type == null && data == null)
? (MATCH_CATEGORY_EMPTY+MATCH_ADJUSTMENT_NORMAL) : NO_MATCH_DATA);
}
if (schemes != null) {
if (schemes.contains(scheme != null ? scheme : "")) {
match = MATCH_CATEGORY_SCHEME;
} else {
return NO_MATCH_DATA;
}
if (authorities != null) {
int authMatch = matchDataAuthority(data);
if (authMatch >= 0) {
if (paths == null) {
match = authMatch;
} else if (hasDataPath(data.getPath())) {
match = MATCH_CATEGORY_PATH;
} else {
return NO_MATCH_DATA;
}
} else {
return NO_MATCH_DATA;
}
}
} else {
// Special case: match either an Intent with no data URI,
// or with a scheme: URI. This is to give a convenience for
// the common case where you want to deal with data in a
// content provider, which is done by type, and we don't want
// to force everyone to say they handle content: or file: URIs.
if (scheme != null && !"".equals(scheme)
&& !"content".equals(scheme)
&& !"file".equals(scheme)) {
return NO_MATCH_DATA;
}
}
if (types != null) {
if (findMimeType(type)) {
match = MATCH_CATEGORY_TYPE;
} else {
return NO_MATCH_TYPE;
}
} else {
// If no MIME types are specified, then we will only match against
// an Intent that does not have a MIME type.
if (type != null) {
return NO_MATCH_TYPE;
}
}
return match + MATCH_ADJUSTMENT_NORMAL;
}
/**
* Add a new Intent category to match against. The semantics of
* categories is the opposite of actions -- an Intent includes the
* categories that it requires, all of which must be included in the
* filter in order to match. In other words, adding a category to the
* filter has no impact on matching unless that category is specified in
* the intent.
*
* @param category Name of category to match, i.e. Intent.CATEGORY_EMBED.
*/
public final void addCategory(String category) {
if (mCategories == null) mCategories = new ArrayList<String>();
if (!mCategories.contains(category)) {
mCategories.add(category.intern());
}
}
/**
* Return the number of categories in the filter.
*/
public final int countCategories() {
return mCategories != null ? mCategories.size() : 0;
}
/**
* Return a category in the filter.
*/
public final String getCategory(int index) {
return mCategories.get(index);
}
/**
* Is the given category included in the filter?
*
* @param category The category that the filter supports.
*
* @return True if the category is explicitly mentioned in the filter.
*/
public final boolean hasCategory(String category) {
return mCategories != null && mCategories.contains(category);
}
/**
* Return an iterator over the filter's categories.
*/
public final Iterator<String> categoriesIterator() {
return mCategories != null ? mCategories.iterator() : null;
}
/**
* Match this filter against an Intent's categories. Each category in
* the Intent must be specified by the filter; if any are not in the
* filter, the match fails.
*
* @param categories The categories included in the intent, as returned by
* Intent.getCategories().
*
* @return If all categories match (success), null; else the name of the
* first category that didn't match.
*/
public final String matchCategories(Set<String> categories) {
if (categories == null) {
return null;
}
Iterator<String> it = categories.iterator();
if (mCategories == null) {
return it.hasNext() ? it.next() : null;
}
while (it.hasNext()) {
final String category = it.next();
if (!mCategories.contains(category)) {
return category;
}
}
return null;
}
/**
* Test whether this filter matches the given <var>intent.
*
* @param intent The Intent to compare against.
* @param resolve If true, the intent's type will be resolved by calling
* Intent.resolveType(); otherwise a simple match against
* Intent.type will be performed.
* @param logTag Tag to use in debugging messages.
*
* @return Returns either a valid match constant (a combination of
* {@link #MATCH_CATEGORY_MASK} and {@link #MATCH_ADJUSTMENT_MASK}),
* or one of the error codes {@link #NO_MATCH_TYPE} if the type didn't match,
* {@link #NO_MATCH_DATA} if the scheme/path didn't match,
* {@link #NO_MATCH_ACTION if the action didn't match, or
* {@link #NO_MATCH_CATEGORY} if one or more categories didn't match.
*
* @return How well the filter matches. Negative if it doesn't match,
* zero or positive positive value if it does with a higher
* value representing a better match.
*
* @see #match(String, String, String, android.net.Uri , Set, String)
*/
public final int match(ContentResolver resolver, Intent intent,
boolean resolve, String logTag) {
String type = resolve ? intent.resolveType(resolver) : intent.getType();
return match(intent.getAction(), type, intent.getScheme(),
intent.getData(), intent.getCategories(), logTag);
}
/**
* Test whether this filter matches the given intent data. A match is
* only successful if the actions and categories in the Intent match
* against the filter, as described in {@link IntentFilter}; in that case,
* the match result returned will be as per {@link #matchData}.
*
* @param action The intent action to match against (Intent.getAction).
* @param type The intent type to match against (Intent.resolveType()).
* @param scheme The data scheme to match against (Intent.getScheme()).
* @param data The data URI to match against (Intent.getData()).
* @param categories The categories to match against
* (Intent.getCategories()).
* @param logTag Tag to use in debugging messages.
*
* @return Returns either a valid match constant (a combination of
* {@link #MATCH_CATEGORY_MASK} and {@link #MATCH_ADJUSTMENT_MASK}),
* or one of the error codes {@link #NO_MATCH_TYPE} if the type didn't match,
* {@link #NO_MATCH_DATA} if the scheme/path didn't match,
* {@link #NO_MATCH_ACTION if the action didn't match, or
* {@link #NO_MATCH_CATEGORY} if one or more categories didn't match.
*
* @see #matchData
* @see Intent#getAction
* @see Intent#resolveType
* @see Intent#getScheme
* @see Intent#getData
* @see Intent#getCategories
*/
public final int match(String action, String type, String scheme,
Uri data, Set<String> categories, String logTag) {
if (action != null && !matchAction(action)) {
if (Config.LOGV) Log.v(
logTag, "No matching action " + action + " for " + this);
return NO_MATCH_ACTION;
}
int dataMatch = matchData(type, scheme, data);
if (dataMatch < 0) {
if (Config.LOGV) {
if (dataMatch == NO_MATCH_TYPE) {
Log.v(logTag, "No matching type " + type
+ " for " + this);
}
if (dataMatch == NO_MATCH_DATA) {
Log.v(logTag, "No matching scheme/path " + data
+ " for " + this);
}
}
return dataMatch;
}
String categoryMatch = matchCategories(categories);
if (categoryMatch != null) {
if (Config.LOGV) Log.v(
logTag, "No matching category "
+ categoryMatch + " for " + this);
return NO_MATCH_CATEGORY;
}
// It would be nice to treat container activities as more
// important than ones that can be embedded, but this is not the way...
if (false) {
if (categories != null) {
dataMatch -= mCategories.size() - categories.size();
}
}
return dataMatch;
}
/**
* Write the contents of the IntentFilter as an XML stream.
*/
public void writeToXml(XmlSerializer serializer) throws IOException {
int N = countActions();
for (int i=0; i<N; i++) {
serializer.startTag(null, ACTION_STR);
serializer.attribute(null, NAME_STR, mActions.get(i));
serializer.endTag(null, ACTION_STR);
}
N = countCategories();
for (int i=0; i<N; i++) {
serializer.startTag(null, CAT_STR);
serializer.attribute(null, NAME_STR, mCategories.get(i));
serializer.endTag(null, CAT_STR);
}
N = countDataTypes();
for (int i=0; i<N; i++) {
serializer.startTag(null, TYPE_STR);
String type = mDataTypes.get(i);
if (type.indexOf('/') < 0) type = type + "/*";
serializer.attribute(null, NAME_STR, type);
serializer.endTag(null, TYPE_STR);
}
N = countDataSchemes();
for (int i=0; i<N; i++) {
serializer.startTag(null, SCHEME_STR);
serializer.attribute(null, NAME_STR, mDataSchemes.get(i));
serializer.endTag(null, SCHEME_STR);
}
N = countDataAuthorities();
for (int i=0; i<N; i++) {
serializer.startTag(null, AUTH_STR);
AuthorityEntry ae = mDataAuthorities.get(i);
serializer.attribute(null, HOST_STR, ae.getHost());
if (ae.getPort() >= 0) {
serializer.attribute(null, PORT_STR, Integer.toString(ae.getPort()));
}
serializer.endTag(null, AUTH_STR);
}
N = countDataPaths();
for (int i=0; i<N; i++) {
serializer.startTag(null, PATH_STR);
PatternMatcher pe = mDataPaths.get(i);
switch (pe.getType()) {
case PatternMatcher.PATTERN_LITERAL:
serializer.attribute(null, LITERAL_STR, pe.getPath());
break;
case PatternMatcher.PATTERN_PREFIX:
serializer.attribute(null, PREFIX_STR, pe.getPath());
break;
case PatternMatcher.PATTERN_SIMPLE_GLOB:
serializer.attribute(null, SGLOB_STR, pe.getPath());
break;
}
serializer.endTag(null, PATH_STR);
}
}
public void readFromXml(XmlPullParser parser) throws XmlPullParserException,
IOException {
int outerDepth = parser.getDepth();
int type;
while ((type=parser.next()) != XmlPullParser.END_DOCUMENT
&& (type != XmlPullParser.END_TAG
|| parser.getDepth() > outerDepth)) {
if (type == XmlPullParser.END_TAG
|| type == XmlPullParser.TEXT) {
continue;
}
String tagName = parser.getName();
if (tagName.equals(ACTION_STR)) {
String name = parser.getAttributeValue(null, NAME_STR);
if (name != null) {
addAction(name);
}
} else if (tagName.equals(CAT_STR)) {
String name = parser.getAttributeValue(null, NAME_STR);
if (name != null) {
addCategory(name);
}
} else if (tagName.equals(TYPE_STR)) {
String name = parser.getAttributeValue(null, NAME_STR);
if (name != null) {
try {
addDataType(name);
} catch (MalformedMimeTypeException e) {
}
}
} else if (tagName.equals(SCHEME_STR)) {
String name = parser.getAttributeValue(null, NAME_STR);
if (name != null) {
addDataScheme(name);
}
} else if (tagName.equals(AUTH_STR)) {
String host = parser.getAttributeValue(null, HOST_STR);
String port = parser.getAttributeValue(null, PORT_STR);
if (host != null) {
addDataAuthority(host, port);
}
} else if (tagName.equals(PATH_STR)) {
String path = parser.getAttributeValue(null, LITERAL_STR);
if (path != null) {
addDataPath(path, PatternMatcher.PATTERN_LITERAL);
} else if ((path=parser.getAttributeValue(null, PREFIX_STR)) != null) {
addDataPath(path, PatternMatcher.PATTERN_PREFIX);
} else if ((path=parser.getAttributeValue(null, SGLOB_STR)) != null) {
addDataPath(path, PatternMatcher.PATTERN_SIMPLE_GLOB);
}
} else {
Log.w("IntentFilter", "Unknown tag parsing IntentFilter: " + tagName);
}
XmlUtils.skipCurrentTag(parser);
}
}
public void dump(Printer du, String prefix) {
StringBuilder sb = new StringBuilder(256);
if (mActions.size() > 0) {
Iterator<String> it = mActions.iterator();
while (it.hasNext()) {
sb.setLength(0);
sb.append(prefix); sb.append("Action: \"");
sb.append(it.next()); sb.append("\"");
du.println(sb.toString());
}
}
if (mCategories != null) {
Iterator<String> it = mCategories.iterator();
while (it.hasNext()) {
sb.setLength(0);
sb.append(prefix); sb.append("Category: \"");
sb.append(it.next()); sb.append("\"");
du.println(sb.toString());
}
}
if (mDataSchemes != null) {
Iterator<String> it = mDataSchemes.iterator();
while (it.hasNext()) {
sb.setLength(0);
sb.append(prefix); sb.append("Scheme: \"");
sb.append(it.next()); sb.append("\"");
du.println(sb.toString());
}
}
if (mDataAuthorities != null) {
Iterator<AuthorityEntry> it = mDataAuthorities.iterator();
while (it.hasNext()) {
AuthorityEntry ae = it.next();
sb.setLength(0);
sb.append(prefix); sb.append("Authority: \"");
sb.append(ae.mHost); sb.append("\": ");
sb.append(ae.mPort);
if (ae.mWild) sb.append(" WILD");
du.println(sb.toString());
}
}
if (mDataPaths != null) {
Iterator<PatternMatcher> it = mDataPaths.iterator();
while (it.hasNext()) {
PatternMatcher pe = it.next();
sb.setLength(0);
sb.append(prefix); sb.append("Path: \"");
sb.append(pe); sb.append("\"");
du.println(sb.toString());
}
}
if (mDataTypes != null) {
Iterator<String> it = mDataTypes.iterator();
while (it.hasNext()) {
sb.setLength(0);
sb.append(prefix); sb.append("Type: \"");
sb.append(it.next()); sb.append("\"");
du.println(sb.toString());
}
}
if (mPriority != 0 || mHasPartialTypes) {
sb.setLength(0);
sb.append(prefix); sb.append("mPriority="); sb.append(mPriority);
sb.append(", mHasPartialTypes="); sb.append(mHasPartialTypes);
du.println(sb.toString());
}
}
public static final Parcelable.Creator<IntentFilter> CREATOR
= new Parcelable.Creator<IntentFilter>() {
public IntentFilter createFromParcel(Parcel source) {
return new IntentFilter(source);
}
public IntentFilter[] newArray(int size) {
return new IntentFilter[size];
}
};
public final int describeContents() {
return 0;
}
public final void writeToParcel(Parcel dest, int flags) {
dest.writeStringList(mActions);
if (mCategories != null) {
dest.writeInt(1);
dest.writeStringList(mCategories);
} else {
dest.writeInt(0);
}
if (mDataSchemes != null) {
dest.writeInt(1);
dest.writeStringList(mDataSchemes);
} else {
dest.writeInt(0);
}
if (mDataTypes != null) {
dest.writeInt(1);
dest.writeStringList(mDataTypes);
} else {
dest.writeInt(0);
}
if (mDataAuthorities != null) {
final int N = mDataAuthorities.size();
dest.writeInt(N);
for (int i=0; i<N; i++) {
mDataAuthorities.get(i).writeToParcel(dest);
}
} else {
dest.writeInt(0);
}
if (mDataPaths != null) {
final int N = mDataPaths.size();
dest.writeInt(N);
for (int i=0; i<N; i++) {
mDataPaths.get(i).writeToParcel(dest, 0);
}
} else {
dest.writeInt(0);
}
dest.writeInt(mPriority);
dest.writeInt(mHasPartialTypes ? 1 : 0);
}
/**
* For debugging -- perform a check on the filter, return true if it passed
* or false if it failed.
*
* {@hide}
*/
public boolean debugCheck() {
return true;
// This code looks for intent filters that do not specify data.
/*
if (mActions != null && mActions.size() == 1
&& mActions.contains(Intent.ACTION_MAIN)) {
return true;
}
if (mDataTypes == null && mDataSchemes == null) {
Log.w("IntentFilter", "QUESTIONABLE INTENT FILTER:");
dump(Log.WARN, "IntentFilter", " ");
return false;
}
return true;
*/
}
private IntentFilter(Parcel source) {
mActions = new ArrayList<String>();
source.readStringList(mActions);
if (source.readInt() != 0) {
mCategories = new ArrayList<String>();
source.readStringList(mCategories);
}
if (source.readInt() != 0) {
mDataSchemes = new ArrayList<String>();
source.readStringList(mDataSchemes);
}
if (source.readInt() != 0) {
mDataTypes = new ArrayList<String>();
source.readStringList(mDataTypes);
}
int N = source.readInt();
if (N > 0) {
mDataAuthorities = new ArrayList<AuthorityEntry>();
for (int i=0; i<N; i++) {
mDataAuthorities.add(new AuthorityEntry(source));
}
}
N = source.readInt();
if (N > 0) {
mDataPaths = new ArrayList<PatternMatcher>();
for (int i=0; i<N; i++) {
mDataPaths.add(new PatternMatcher(source));
}
}
mPriority = source.readInt();
mHasPartialTypes = source.readInt() > 0;
}
private final boolean findMimeType(String type) {
final ArrayList<String> t = mDataTypes;
if (type == null) {
return false;
}
if (t.contains(type)) {
return true;
}
// Deal with an Intent wanting to match every type in the IntentFilter.
final int typeLength = type.length();
if (typeLength == 3 && type.equals("*/*")) {
return !t.isEmpty();
}
// Deal with this IntentFilter wanting to match every Intent type.
if (mHasPartialTypes && t.contains("*")) {
return true;
}
final int slashpos = type.indexOf('/');
if (slashpos > 0) {
if (mHasPartialTypes && t.contains(type.substring(0, slashpos))) {
return true;
}
if (typeLength == slashpos+2 && type.charAt(slashpos+1) == '*') {
// Need to look through all types for one that matches
// our base...
final Iterator<String> it = t.iterator();
while (it.hasNext()) {
String v = it.next();
if (type.regionMatches(0, v, 0, slashpos+1)) {
return true;
}
}
}
}
return false;
}
}
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