1.1 --- a/lookup/src/main/java/org/openide/util/lookup/DelegatingStorage.java Wed Jan 27 17:46:23 2010 -0500
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,180 +0,0 @@
1.4 -/*
1.5 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
1.6 - *
1.7 - * Copyright 1997-2009 Sun Microsystems, Inc. All rights reserved.
1.8 - *
1.9 - * The contents of this file are subject to the terms of either the GNU
1.10 - * General Public License Version 2 only ("GPL") or the Common
1.11 - * Development and Distribution License("CDDL") (collectively, the
1.12 - * "License"). You may not use this file except in compliance with the
1.13 - * License. You can obtain a copy of the License at
1.14 - * http://www.netbeans.org/cddl-gplv2.html
1.15 - * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
1.16 - * specific language governing permissions and limitations under the
1.17 - * License. When distributing the software, include this License Header
1.18 - * Notice in each file and include the License file at
1.19 - * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
1.20 - * particular file as subject to the "Classpath" exception as provided
1.21 - * by Sun in the GPL Version 2 section of the License file that
1.22 - * accompanied this code. If applicable, add the following below the
1.23 - * License Header, with the fields enclosed by brackets [] replaced by
1.24 - * your own identifying information:
1.25 - * "Portions Copyrighted [year] [name of copyright owner]"
1.26 - *
1.27 - * Contributor(s):
1.28 - *
1.29 - * The Original Software is NetBeans. The Initial Developer of the Original
1.30 - * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
1.31 - * Microsystems, Inc. All Rights Reserved.
1.32 - *
1.33 - * If you wish your version of this file to be governed by only the CDDL
1.34 - * or only the GPL Version 2, indicate your decision by adding
1.35 - * "[Contributor] elects to include this software in this distribution
1.36 - * under the [CDDL or GPL Version 2] license." If you do not indicate a
1.37 - * single choice of license, a recipient has the option to distribute
1.38 - * your version of this file under either the CDDL, the GPL Version 2 or
1.39 - * to extend the choice of license to its licensees as provided above.
1.40 - * However, if you add GPL Version 2 code and therefore, elected the GPL
1.41 - * Version 2 license, then the option applies only if the new code is
1.42 - * made subject to such option by the copyright holder.
1.43 - */
1.44 -package org.openide.util.lookup;
1.45 -
1.46 -import org.openide.util.Lookup;
1.47 -
1.48 -import java.io.*;
1.49 -
1.50 -import java.lang.ref.WeakReference;
1.51 -
1.52 -import java.util.*;
1.53 -import org.openide.util.lookup.AbstractLookup.Pair;
1.54 -
1.55 -
1.56 -/** Storages that can switch between another storages.
1.57 - * @author Jaroslav Tulach
1.58 - */
1.59 -final class DelegatingStorage<Transaction> extends Object
1.60 -implements Serializable, AbstractLookup.Storage<Transaction> {
1.61 - /** object to delegate to */
1.62 - private AbstractLookup.Storage<Transaction> delegate;
1.63 -
1.64 - /** thread just accessing the storage */
1.65 - private Thread owner;
1.66 -
1.67 - public DelegatingStorage(AbstractLookup.Storage<Transaction> d) {
1.68 - this.delegate = d;
1.69 - this.owner = Thread.currentThread();
1.70 - }
1.71 -
1.72 - /** Never serialize yourself, always put there the delegate */
1.73 - public Object writeReplace() {
1.74 - return this.delegate;
1.75 - }
1.76 -
1.77 - /** Method to check whether there is not multiple access from the same thread.
1.78 - */
1.79 - public void checkForTreeModification() {
1.80 - if (Thread.currentThread() == owner) {
1.81 - throw new AbstractLookup.ISE("You are trying to modify lookup from lookup query!"); // NOI18N
1.82 - }
1.83 - }
1.84 -
1.85 - /** Checks whether we have simple behaviour or complex.
1.86 - */
1.87 - public static boolean isSimple(AbstractLookup.Storage s) {
1.88 - if (s instanceof DelegatingStorage) {
1.89 - return ((DelegatingStorage) s).delegate instanceof ArrayStorage;
1.90 - } else {
1.91 - return s instanceof ArrayStorage;
1.92 - }
1.93 - }
1.94 -
1.95 - /** Exits from the owners ship of the storage.
1.96 - */
1.97 - public AbstractLookup.Storage<Transaction> exitDelegate() {
1.98 - if (Thread.currentThread() != owner) {
1.99 - throw new IllegalStateException("Onwer: " + owner + " caller: " + Thread.currentThread()); // NOI18N
1.100 - }
1.101 -
1.102 - AbstractLookup.Storage<Transaction> d = delegate;
1.103 - delegate = null;
1.104 -
1.105 - return d;
1.106 - }
1.107 -
1.108 - public boolean add(AbstractLookup.Pair<?> item, Transaction transaction) {
1.109 - return delegate.add(item, transaction);
1.110 - }
1.111 -
1.112 - public void remove(org.openide.util.lookup.AbstractLookup.Pair item, Transaction transaction) {
1.113 - delegate.remove(item, transaction);
1.114 - }
1.115 -
1.116 - public void retainAll(Map retain, Transaction transaction) {
1.117 - delegate.retainAll(retain, transaction);
1.118 - }
1.119 -
1.120 - /** A special method to change the backing storage.
1.121 - * In fact it is not much typesafe as it changes the
1.122 - * type of Transaction but we know that nobody is currently
1.123 - * holding a transaction object, so there cannot be inconsitencies.
1.124 - */
1.125 - @SuppressWarnings("unchecked")
1.126 - private void changeDelegate(InheritanceTree st) {
1.127 - delegate = (AbstractLookup.Storage<Transaction>)st;
1.128 - }
1.129 -
1.130 - public Transaction beginTransaction(int ensure) {
1.131 - try {
1.132 - return delegate.beginTransaction(ensure);
1.133 - } catch (UnsupportedOperationException ex) {
1.134 - // let's convert to InheritanceTree
1.135 - ArrayStorage arr = (ArrayStorage) delegate;
1.136 - InheritanceTree inh = new InheritanceTree();
1.137 - changeDelegate(inh);
1.138 -
1.139 - //
1.140 - // Copy content
1.141 - //
1.142 - Enumeration<Pair<Object>> en = arr.lookup(Object.class);
1.143 -
1.144 - while (en.hasMoreElements()) {
1.145 - if (!inh.add(en.nextElement(), new ArrayList<Class>())) {
1.146 - throw new IllegalStateException("All objects have to be accepted"); // NOI18N
1.147 - }
1.148 - }
1.149 -
1.150 - //
1.151 - // Copy listeners
1.152 - //
1.153 - AbstractLookup.ReferenceToResult<?> ref = arr.cleanUpResult(null);
1.154 -
1.155 - if (ref != null) {
1.156 - ref.cloneList(inh);
1.157 - }
1.158 -
1.159 - // we have added the current content and now we can start transaction
1.160 - return delegate.beginTransaction(ensure);
1.161 - }
1.162 - }
1.163 -
1.164 - public org.openide.util.lookup.AbstractLookup.ReferenceToResult cleanUpResult(
1.165 - org.openide.util.Lookup.Template templ
1.166 - ) {
1.167 - return delegate.cleanUpResult(templ);
1.168 - }
1.169 -
1.170 - public void endTransaction(Transaction transaction, Set<AbstractLookup.R> modified) {
1.171 - delegate.endTransaction(transaction, modified);
1.172 - }
1.173 -
1.174 - public <T> Enumeration<Pair<T>> lookup(Class<T> clazz) {
1.175 - return delegate.lookup(clazz);
1.176 - }
1.177 -
1.178 - public org.openide.util.lookup.AbstractLookup.ReferenceToResult registerReferenceToResult(
1.179 - org.openide.util.lookup.AbstractLookup.ReferenceToResult newRef
1.180 - ) {
1.181 - return delegate.registerReferenceToResult(newRef);
1.182 - }
1.183 -}