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The source code
/*
* Sun Public License Notice
*
* The contents of this file are subject to the Sun Public License
* Version 1.0 (the "License"). You may not use this file except in
* compliance with the License. A copy of the License is available at
* http://www.sun.com/
*
* The Original Code is NetBeans. The Initial Developer of the Original
* Code is Sun Microsystems, Inc. Portions Copyright 2002 Sun
* Microsystems, Inc. All Rights Reserved.
*/
package org.netbeans.modules.settings;
import java.io.IOException;
import org.openide.filesystems.FileObject;
import org.openide.filesystems.FileSystem;
import org.openide.filesystems.Repository;
import org.openide.loaders.DataObject;
import org.openide.loaders.Environment;
import org.openide.util.Lookup;
/** A provider for .settings files of a certain DTD.
* It creates a suitable convertor according to {@link #EA_CONVERTOR}.
*
* @author Jan Pokorsky
*/
public final class Env implements Environment.Provider {
/** file attribute containing convertor object. Usage
* <attr name="settings.convertor" methodvalue="org.netbeans.modules.settings.XMLPropertiesConvertor.create"/>
*
*/
public final static String EA_CONVERTOR = "settings.convertor"; //NOI18N
/** file attribute containing path to the provider. Used by
* InstanceDataObject.create or upgrade algorithm. Usage
* <attr name="settings.providerPath" stringvalue="xml/lookups/NetBeans/DTD_XML_Properties_1_0.instance"/>
*
*/
public final static String EA_PROVIDER_PATH = "settings.providerPath"; // NOI18N
/** file attribute containing PUBLIC attribute of xml header. Usage
* <attr name="hint.originalPublicID" stringvalue="-//NetBeans//DTD XML Properties 1.0//EN"/>
*
*/
public final static String EA_PUBLICID = "hint.originalPublicID"; // NOI18N
/** file attribute containnig class name of the setting object. Usage
* <attr name="settings.instanceClass" stringvalue="org.netbeans.modules.foo.Foo"/>
*
*/
public final static String EA_INSTANCE_CLASS_NAME = "settings.instanceClass"; //NOI18N
/** file attribute containnig class name and subclass names of the setting object. Use the
* attribute for performance reasons. Usage
* <attr name="settings.instanceOf" stringvalue="org.netbeans.modules.foo.Foo[, ...]"/>
*
*/
public final static String EA_INSTANCE_OF = "settings.instanceOf"; //NOI18N
/** file attribute containnig the setting object. Usage
* <attr name="settings.instanceCreate" newvalue="org.netbeans.modules.foo.Foo"/>
* or
* <attr name="settings.instanceCreate" methodvalue="org.netbeans.modules.foo.Foo.create"/>
*
*/
public final static String EA_INSTANCE_CREATE = "settings.instanceCreate"; //NOI18N
private final FileObject providerFO;
/** create Environment.Provider */
public static Environment.Provider create(FileObject fo) {
return new Env(fo);
}
private Env(FileObject fo) {
providerFO = fo;
}
public Lookup getEnvironment(DataObject dobj) {
if (!(dobj instanceof org.openide.loaders.InstanceDataObject)) return Lookup.EMPTY;
InstanceProvider icp = new InstanceProvider(dobj, providerFO);
return icp.getLookup();
}
/** parse file attribute
* @param attr String value can be null; used delimiter is ","
* @return set of items
*/
public static java.util.Set parseAttribute(Object attr) {
if (attr != null && attr instanceof String) {
java.util.StringTokenizer s =
new java.util.StringTokenizer((String) attr, ","); //NOI18N
java.util.Set set = new java.util.HashSet(10);
while (s.hasMoreTokens()) {
set.add(s.nextToken().trim());
}
return set;
} else {
return java.util.Collections.EMPTY_SET;
}
}
/** look up appropriate provider according to clazz */
public static FileObject findProvider(Class clazz) throws IOException {
String prefix = "xml/memory/"; //NOI18N
String name = clazz.getName().replace('.', '/');
FileSystem sfs = Repository.getDefault().getDefaultFileSystem();
FileObject memContext = sfs.findResource(prefix);
if (memContext == null) throw new java.io.FileNotFoundException("SFS/xml/memory/"); //NOI18N
String convertorPath = new StringBuffer(200).append(prefix).
append(name).toString(); // NOI18N
FileObject fo = sfs.findResource(convertorPath);
if (fo != null) {
String providerPath = (String) fo.getAttribute(EA_PROVIDER_PATH);
if (providerPath != null) {
return sfs.findResource(providerPath);
}
}
return null;
}
private static String xmlLookupsPrefix = "xml/lookups"; // NOI18N
private static String xmlEntitiesPrefix = "xml/entities"; // NOI18N
/** find an entity registration according to passed provider
* @param provider provider file object
* @return entity file object
*/
public static FileObject findEntityRegistration(FileObject provider) {
String filename = provider.getPath();
int i = filename.lastIndexOf('.');
if (i != -1 && i > filename.lastIndexOf('/')) {
filename = filename.substring(0, i);
}
String resource = xmlEntitiesPrefix +
filename.substring(xmlLookupsPrefix.length(), filename.length());
return Repository.getDefault().getDefaultFileSystem().findResource(resource);
}
}
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