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003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
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008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
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041:
042: package org.netbeans.modules.gsfpath.platform.classpath;
043:
044: import java.util.Collections;
045: import org.netbeans.modules.gsfpath.spi.classpath.support.ClassPathSupport;
046: import org.openide.filesystems.FileObject;
047: import org.openide.filesystems.FileUtil;
048: import org.netbeans.modules.gsfpath.api.classpath.ClassPath;
049: import org.netbeans.modules.gsfpath.spi.classpath.ClassPathProvider;
050: import org.netbeans.modules.gsfpath.api.platform.JavaPlatform;
051: import org.netbeans.modules.gsfpath.api.platform.JavaPlatformManager;
052: import org.netbeans.modules.gsfpath.spi.classpath.PathResourceImplementation;
053:
054: public class PlatformClassPathProvider implements ClassPathProvider {
055:
056: /** Creates a new instance of PlatformClassPathProvider */
057: public PlatformClassPathProvider() {
058: }
059:
060: public ClassPath findClassPath(FileObject fo, String type) {
061: if (fo == null || type == null) {
062: throw new IllegalArgumentException();
063: }
064: JavaPlatform lp = this .getLastUsedPlatform(fo);
065: JavaPlatform[] platforms;
066: if (lp != null) {
067: platforms = new JavaPlatform[] { lp };
068: } else {
069: JavaPlatformManager manager = JavaPlatformManager
070: .getDefault();
071: platforms = manager.getInstalledPlatforms();
072: }
073: for (int i = 0; i < platforms.length; i++) {
074: ClassPath bootClassPath = platforms[i]
075: .getBootstrapLibraries();
076: ClassPath libraryPath = platforms[i].getStandardLibraries();
077: ClassPath sourcePath = platforms[i].getSourceFolders();
078: FileObject root = null;
079: if (ClassPath.SOURCE.equals(type) && sourcePath != null
080: && (root = sourcePath.findOwnerRoot(fo)) != null) {
081: this .setLastUsedPlatform(root, platforms[i]);
082: return sourcePath;
083: } else if (ClassPath.BOOT.equals(type)
084: && ((bootClassPath != null && (root = bootClassPath
085: .findOwnerRoot(fo)) != null)
086: || (sourcePath != null && (root = sourcePath
087: .findOwnerRoot(fo)) != null) || (libraryPath != null && (root = libraryPath
088: .findOwnerRoot(fo)) != null))) {
089: this .setLastUsedPlatform(root, platforms[i]);
090: return bootClassPath;
091: } else if (ClassPath.COMPILE.equals(type)) {
092: if (libraryPath != null
093: && (root = libraryPath.findOwnerRoot(fo)) != null) {
094: this .setLastUsedPlatform(root, platforms[i]);
095: return libraryPath;
096: } else if ((bootClassPath != null && (root = bootClassPath
097: .findOwnerRoot(fo)) != null)
098: || (sourcePath != null && (root = sourcePath
099: .findOwnerRoot(fo)) != null)) {
100: return this .getEmptyClassPath();
101: }
102: }
103: }
104: return null;
105: }
106:
107: private synchronized ClassPath getEmptyClassPath() {
108: if (this .emptyCp == null) {
109: this .emptyCp = ClassPathSupport.createClassPath(Collections
110: .<PathResourceImplementation> emptyList());
111: }
112: return this .emptyCp;
113: }
114:
115: private synchronized void setLastUsedPlatform(FileObject root,
116: JavaPlatform platform) {
117: this .lastUsedRoot = root;
118: this .lastUsedPlatform = platform;
119: }
120:
121: private synchronized JavaPlatform getLastUsedPlatform(
122: FileObject file) {
123: if (this .lastUsedRoot != null
124: && FileUtil.isParentOf(this .lastUsedRoot, file)) {
125: return lastUsedPlatform;
126: } else {
127: return null;
128: }
129: }
130:
131: private FileObject lastUsedRoot;
132: private JavaPlatform lastUsedPlatform;
133: private ClassPath emptyCp;
134: }
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