001: /*
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004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
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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
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041:
042: package org.netbeans.modules.cnd.modelimpl.cache.impl;
043:
044: import antlr.collections.AST;
045: import java.lang.ref.SoftReference;
046: import java.lang.ref.WeakReference;
047: import org.netbeans.modules.cnd.apt.structure.APTFile;
048: import org.netbeans.modules.cnd.apt.support.APTPreprocHandler;
049: import org.netbeans.modules.cnd.modelimpl.cache.*;
050:
051: /**
052: * memory-sensitive cache entry:
053: * - APT light (soft reference)
054: * - APT (weak reference)
055: * - AST (weak reference)
056: * @author Vladimir Voskresensky
057: */
058: final class FileCacheWeakImpl implements FileCache {
059: // light APT
060: private SoftReference/*<APTFile>*/aptLight = null;
061: // full APT
062: private SoftReference/*<APTFile>*/aptFull = null;
063: // AST
064: private SoftReference/*<APT>*/ast = null;
065:
066: public FileCacheWeakImpl() {
067:
068: }
069:
070: public FileCacheWeakImpl(FileCache cache) {
071: assert (cache != null);
072: this .aptLight = new SoftReference(cache.getAPTLight());
073: this .aptFull = new SoftReference(cache.getAPT());
074: this .ast = new SoftReference(cache.getAST(null));
075: }
076:
077: public APTFile getAPTLight() {
078: return aptLight != null ? (APTFile) aptLight.get() : null;
079: }
080:
081: public void setAPTLight(APTFile aptLight) {
082: this .aptLight = new SoftReference(aptLight);
083: }
084:
085: public APTFile getAPT() {
086: return aptFull != null ? (APTFile) aptFull.get() : null;
087: }
088:
089: public void setAPT(APTFile aptFull) {
090: this .aptFull = new SoftReference(aptFull);
091: }
092:
093: public AST getAST(APTPreprocHandler preprocHandler) {
094: // we use the same AST now
095: return ast != null ? (AST) ast.get() : null;
096: }
097:
098: public void setAST(AST ast, APTPreprocHandler preprocHandler) {
099: // we use the same AST now
100: this .ast = new SoftReference(ast);
101: }
102:
103: // private Object aptLock = new Object() {
104: // public String toString() {
105: // return "APT lock";
106: // }
107: // };
108: //
109: // private Object aptLightLock = new Object() {
110: // public String toString() {
111: // return "APT Light lock";
112: // }
113: // };
114: //
115: //
116: // private Object astLock = new Object() {
117: // public String toString() {
118: // return "AST lock";
119: // }
120: // };
121: }
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