Tomcat example source code file (ResourceAttributes.java)
The Tomcat ResourceAttributes.java source code/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.naming.resources;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import java.util.Vector;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.BasicAttribute;
/**
* Attributes implementation.
*
* @author <a href="mailto:remm@apache.org">Remy Maucherat
* @version $Revision: 467222 $
*/
public class ResourceAttributes implements Attributes {
// -------------------------------------------------------------- Constants
// Default attribute names
/**
* Creation date.
*/
public static final String CREATION_DATE = "creationdate";
/**
* Creation date.
*/
public static final String ALTERNATE_CREATION_DATE = "creation-date";
/**
* Last modification date.
*/
public static final String LAST_MODIFIED = "getlastmodified";
/**
* Last modification date.
*/
public static final String ALTERNATE_LAST_MODIFIED = "last-modified";
/**
* Name.
*/
public static final String NAME = "displayname";
/**
* Type.
*/
public static final String TYPE = "resourcetype";
/**
* Type.
*/
public static final String ALTERNATE_TYPE = "content-type";
/**
* Source.
*/
public static final String SOURCE = "source";
/**
* MIME type of the content.
*/
public static final String CONTENT_TYPE = "getcontenttype";
/**
* Content language.
*/
public static final String CONTENT_LANGUAGE = "getcontentlanguage";
/**
* Content length.
*/
public static final String CONTENT_LENGTH = "getcontentlength";
/**
* Content length.
*/
public static final String ALTERNATE_CONTENT_LENGTH = "content-length";
/**
* ETag.
*/
public static final String ETAG = "getetag";
/**
* Collection type.
*/
public static final String COLLECTION_TYPE = "<collection/>";
/**
* HTTP date format.
*/
protected static final SimpleDateFormat format =
new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US);
/**
* Date formats using for Date parsing.
*/
protected static final SimpleDateFormat formats[] = {
new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US),
new SimpleDateFormat("EEEEEE, dd-MMM-yy HH:mm:ss zzz", Locale.US),
new SimpleDateFormat("EEE MMMM d HH:mm:ss yyyy", Locale.US)
};
protected final static TimeZone gmtZone = TimeZone.getTimeZone("GMT");
/**
* GMT timezone - all HTTP dates are on GMT
*/
static {
format.setTimeZone(gmtZone);
formats[0].setTimeZone(gmtZone);
formats[1].setTimeZone(gmtZone);
formats[2].setTimeZone(gmtZone);
}
// ----------------------------------------------------------- Constructors
/**
* Default constructor.
*/
public ResourceAttributes() {
}
/**
* Merges with another attribute set.
*/
public ResourceAttributes(Attributes attributes) {
this.attributes = attributes;
}
// ----------------------------------------------------- Instance Variables
/**
* Collection flag.
*/
protected boolean collection = false;
/**
* Content length.
*/
protected long contentLength = -1;
/**
* Creation time.
*/
protected long creation = -1;
/**
* Creation date.
*/
protected Date creationDate = null;
/**
* Last modified time.
*/
protected long lastModified = -1;
/**
* Last modified date.
*/
protected Date lastModifiedDate = null;
/**
* Last modified date in HTTP format.
*/
protected String lastModifiedHttp = null;
/**
* MIME type.
*/
protected String mimeType = null;
/**
* Name.
*/
protected String name = null;
/**
* Weak ETag.
*/
protected String weakETag = null;
/**
* Strong ETag.
*/
protected String strongETag = null;
/**
* External attributes.
*/
protected Attributes attributes = null;
// ------------------------------------------------------------- Properties
/**
* Is collection.
*/
public boolean isCollection() {
if (attributes != null) {
return (getResourceType().equals(COLLECTION_TYPE));
} else {
return (collection);
}
}
/**
* Set collection flag.
*
* @param collection New flag value
*/
public void setCollection(boolean collection) {
this.collection = collection;
if (attributes != null) {
String value = "";
if (collection)
value = COLLECTION_TYPE;
attributes.put(TYPE, value);
}
}
/**
* Get content length.
*
* @return content length value
*/
public long getContentLength() {
if (contentLength != -1L)
return contentLength;
if (attributes != null) {
Attribute attribute = attributes.get(CONTENT_LENGTH);
if (attribute != null) {
try {
Object value = attribute.get();
if (value instanceof Long) {
contentLength = ((Long) value).longValue();
} else {
try {
contentLength = Long.parseLong(value.toString());
} catch (NumberFormatException e) {
; // Ignore
}
}
} catch (NamingException e) {
; // No value for the attribute
}
}
}
return contentLength;
}
/**
* Set content length.
*
* @param contentLength New content length value
*/
public void setContentLength(long contentLength) {
this.contentLength = contentLength;
if (attributes != null)
attributes.put(CONTENT_LENGTH, new Long(contentLength));
}
/**
* Get creation time.
*
* @return creation time value
*/
public long getCreation() {
if (creation != -1L)
return creation;
if (creationDate != null)
return creationDate.getTime();
if (attributes != null) {
Attribute attribute = attributes.get(CREATION_DATE);
if (attribute != null) {
try {
Object value = attribute.get();
if (value instanceof Long) {
creation = ((Long) value).longValue();
} else if (value instanceof Date) {
creation = ((Date) value).getTime();
creationDate = (Date) value;
} else {
String creationDateValue = value.toString();
Date result = null;
// Parsing the HTTP Date
for (int i = 0; (result == null) &&
(i < formats.length); i++) {
try {
result = formats[i].parse(creationDateValue);
} catch (ParseException e) {
;
}
}
if (result != null) {
creation = result.getTime();
creationDate = result;
}
}
} catch (NamingException e) {
; // No value for the attribute
}
}
}
return creation;
}
/**
* Set creation.
*
* @param creation New creation value
*/
public void setCreation(long creation) {
this.creation = creation;
this.creationDate = null;
if (attributes != null)
attributes.put(CREATION_DATE, new Date(creation));
}
/**
* Get creation date.
*
* @return Creation date value
*/
public Date getCreationDate() {
if (creationDate != null)
return creationDate;
if (creation != -1L) {
creationDate = new Date(creation);
return creationDate;
}
if (attributes != null) {
Attribute attribute = attributes.get(CREATION_DATE);
if (attribute != null) {
try {
Object value = attribute.get();
if (value instanceof Long) {
creation = ((Long) value).longValue();
creationDate = new Date(creation);
} else if (value instanceof Date) {
creation = ((Date) value).getTime();
creationDate = (Date) value;
} else {
String creationDateValue = value.toString();
Date result = null;
// Parsing the HTTP Date
for (int i = 0; (result == null) &&
(i < formats.length); i++) {
try {
result = formats[i].parse(creationDateValue);
} catch (ParseException e) {
;
}
}
if (result != null) {
creation = result.getTime();
creationDate = result;
}
}
} catch (NamingException e) {
; // No value for the attribute
}
}
}
return creationDate;
}
/**
* Creation date mutator.
*
* @param creationDate New creation date
*/
public void setCreationDate(Date creationDate) {
this.creation = creationDate.getTime();
this.creationDate = creationDate;
if (attributes != null)
attributes.put(CREATION_DATE, creationDate);
}
/**
* Get last modified time.
*
* @return lastModified time value
*/
public long getLastModified() {
if (lastModified != -1L)
return lastModified;
if (lastModifiedDate != null)
return lastModifiedDate.getTime();
if (attributes != null) {
Attribute attribute = attributes.get(LAST_MODIFIED);
if (attribute != null) {
try {
Object value = attribute.get();
if (value instanceof Long) {
lastModified = ((Long) value).longValue();
} else if (value instanceof Date) {
lastModified = ((Date) value).getTime();
lastModifiedDate = (Date) value;
} else {
String lastModifiedDateValue = value.toString();
Date result = null;
// Parsing the HTTP Date
for (int i = 0; (result == null) &&
(i < formats.length); i++) {
try {
result =
formats[i].parse(lastModifiedDateValue);
} catch (ParseException e) {
;
}
}
if (result != null) {
lastModified = result.getTime();
lastModifiedDate = result;
}
}
} catch (NamingException e) {
; // No value for the attribute
}
}
}
return lastModified;
}
/**
* Set last modified.
*
* @param lastModified New last modified value
*/
public void setLastModified(long lastModified) {
this.lastModified = lastModified;
this.lastModifiedDate = null;
if (attributes != null)
attributes.put(LAST_MODIFIED, new Date(lastModified));
}
/**
* Set last modified date.
*
* @param lastModified New last modified date value
* @deprecated
*/
public void setLastModified(Date lastModified) {
setLastModifiedDate(lastModified);
}
/**
* Get lastModified date.
*
* @return LastModified date value
*/
public Date getLastModifiedDate() {
if (lastModifiedDate != null)
return lastModifiedDate;
if (lastModified != -1L) {
lastModifiedDate = new Date(lastModified);
return lastModifiedDate;
}
if (attributes != null) {
Attribute attribute = attributes.get(LAST_MODIFIED);
if (attribute != null) {
try {
Object value = attribute.get();
if (value instanceof Long) {
lastModified = ((Long) value).longValue();
lastModifiedDate = new Date(lastModified);
} else if (value instanceof Date) {
lastModified = ((Date) value).getTime();
lastModifiedDate = (Date) value;
} else {
String lastModifiedDateValue = value.toString();
Date result = null;
// Parsing the HTTP Date
for (int i = 0; (result == null) &&
(i < formats.length); i++) {
try {
result =
formats[i].parse(lastModifiedDateValue);
} catch (ParseException e) {
;
}
}
if (result != null) {
lastModified = result.getTime();
lastModifiedDate = result;
}
}
} catch (NamingException e) {
; // No value for the attribute
}
}
}
return lastModifiedDate;
}
/**
* Last modified date mutator.
*
* @param lastModifiedDate New last modified date
*/
public void setLastModifiedDate(Date lastModifiedDate) {
this.lastModified = lastModifiedDate.getTime();
this.lastModifiedDate = lastModifiedDate;
if (attributes != null)
attributes.put(LAST_MODIFIED, lastModifiedDate);
}
/**
* @return Returns the lastModifiedHttp.
*/
public String getLastModifiedHttp() {
if (lastModifiedHttp != null)
return lastModifiedHttp;
Date modifiedDate = getLastModifiedDate();
if (modifiedDate == null) {
modifiedDate = getCreationDate();
}
if (modifiedDate == null) {
modifiedDate = new Date();
}
synchronized (format) {
lastModifiedHttp = format.format(modifiedDate);
}
return lastModifiedHttp;
}
/**
* @param lastModifiedHttp The lastModifiedHttp to set.
*/
public void setLastModifiedHttp(String lastModifiedHttp) {
this.lastModifiedHttp = lastModifiedHttp;
}
/**
* @return Returns the mimeType.
*/
public String getMimeType() {
return mimeType;
}
/**
* @param mimeType The mimeType to set.
*/
public void setMimeType(String mimeType) {
this.mimeType = mimeType;
}
/**
* Get name.
*
* @return Name value
*/
public String getName() {
if (name != null)
return name;
if (attributes != null) {
Attribute attribute = attributes.get(NAME);
if (attribute != null) {
try {
name = attribute.get().toString();
} catch (NamingException e) {
; // No value for the attribute
}
}
}
return name;
}
/**
* Set name.
*
* @param name New name value
*/
public void setName(String name) {
this.name = name;
if (attributes != null)
attributes.put(NAME, name);
}
/**
* Get resource type.
*
* @return String resource type
*/
public String getResourceType() {
String result = null;
if (attributes != null) {
Attribute attribute = attributes.get(TYPE);
if (attribute != null) {
try {
result = attribute.get().toString();
} catch (NamingException e) {
; // No value for the attribute
}
}
}
if (result == null) {
if (collection)
result = COLLECTION_TYPE;
else
result = "";
}
return result;
}
/**
* Type mutator.
*
* @param resourceType New resource type
*/
public void setResourceType(String resourceType) {
collection = resourceType.equals(COLLECTION_TYPE);
if (attributes != null)
attributes.put(TYPE, resourceType);
}
/**
* Get ETag.
*
* @return Weak ETag
*/
public String getETag() {
return getETag(false);
}
/**
* Get ETag.
*
* @param strong If true, the strong ETag will be returned
* @return ETag
*/
public String getETag(boolean strong) {
String result = null;
if (attributes != null) {
Attribute attribute = attributes.get(ETAG);
if (attribute != null) {
try {
result = attribute.get().toString();
} catch (NamingException e) {
; // No value for the attribute
}
}
}
if (strong) {
// The strong ETag must always be calculated by the resources
result = strongETag;
} else {
// The weakETag is contentLenght + lastModified
if (weakETag == null) {
weakETag = "W/\"" + getContentLength() + "-"
+ getLastModified() + "\"";
}
result = weakETag;
}
return result;
}
/**
* Set strong ETag.
*/
public void setETag(String eTag) {
this.strongETag = eTag;
if (attributes != null)
attributes.put(ETAG, eTag);
}
/**
* Return the canonical path of the resource, to possibly be used for
* direct file serving. Implementations which support this should override
* it to return the file path.
*
* @return The canonical path of the resource
*/
public String getCanonicalPath() {
return null;
}
// ----------------------------------------------------- Attributes Methods
/**
* Get attribute.
*/
public Attribute get(String attrID) {
if (attributes == null) {
if (attrID.equals(CREATION_DATE)) {
return new BasicAttribute(CREATION_DATE, getCreationDate());
} else if (attrID.equals(ALTERNATE_CREATION_DATE)) {
return new BasicAttribute(ALTERNATE_CREATION_DATE,
getCreationDate());
} else if (attrID.equals(LAST_MODIFIED)) {
return new BasicAttribute(LAST_MODIFIED,
getLastModifiedDate());
} else if (attrID.equals(ALTERNATE_LAST_MODIFIED)) {
return new BasicAttribute(ALTERNATE_LAST_MODIFIED,
getLastModifiedDate());
} else if (attrID.equals(NAME)) {
return new BasicAttribute(NAME, getName());
} else if (attrID.equals(TYPE)) {
return new BasicAttribute(TYPE, getResourceType());
} else if (attrID.equals(ALTERNATE_TYPE)) {
return new BasicAttribute(ALTERNATE_TYPE, getResourceType());
} else if (attrID.equals(CONTENT_LENGTH)) {
return new BasicAttribute(CONTENT_LENGTH,
new Long(getContentLength()));
} else if (attrID.equals(ALTERNATE_CONTENT_LENGTH)) {
return new BasicAttribute(ALTERNATE_CONTENT_LENGTH,
new Long(getContentLength()));
}
} else {
return attributes.get(attrID);
}
return null;
}
/**
* Put attribute.
*/
public Attribute put(Attribute attribute) {
if (attributes == null) {
try {
return put(attribute.getID(), attribute.get());
} catch (NamingException e) {
return null;
}
} else {
return attributes.put(attribute);
}
}
/**
* Put attribute.
*/
public Attribute put(String attrID, Object val) {
if (attributes == null) {
return null; // No reason to implement this
} else {
return attributes.put(attrID, val);
}
}
/**
* Remove attribute.
*/
public Attribute remove(String attrID) {
if (attributes == null) {
return null; // No reason to implement this
} else {
return attributes.remove(attrID);
}
}
/**
* Get all attributes.
*/
public NamingEnumeration getAll() {
if (attributes == null) {
Vector attributes = new Vector();
attributes.addElement(new BasicAttribute
(CREATION_DATE, getCreationDate()));
attributes.addElement(new BasicAttribute
(LAST_MODIFIED, getLastModifiedDate()));
attributes.addElement(new BasicAttribute(NAME, getName()));
attributes.addElement(new BasicAttribute(TYPE, getResourceType()));
attributes.addElement
(new BasicAttribute(CONTENT_LENGTH,
new Long(getContentLength())));
return new RecyclableNamingEnumeration(attributes);
} else {
return attributes.getAll();
}
}
/**
* Get all attribute IDs.
*/
public NamingEnumeration getIDs() {
if (attributes == null) {
Vector attributeIDs = new Vector();
attributeIDs.addElement(CREATION_DATE);
attributeIDs.addElement(LAST_MODIFIED);
attributeIDs.addElement(NAME);
attributeIDs.addElement(TYPE);
attributeIDs.addElement(CONTENT_LENGTH);
return new RecyclableNamingEnumeration(attributeIDs);
} else {
return attributes.getIDs();
}
}
/**
* Retrieves the number of attributes in the attribute set.
*/
public int size() {
if (attributes == null) {
return 5;
} else {
return attributes.size();
}
}
/**
* Clone the attributes object (WARNING: fake cloning).
*/
public Object clone() {
return this;
}
/**
* Case sensitivity.
*/
public boolean isCaseIgnored() {
return false;
}
}
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