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Index: masterfs/apichanges.xml
--- masterfs/apichanges.xml Base (BASE)
+++ masterfs/apichanges.xml Locally Modified (Based On LOCAL)
@@ -49,6 +49,19 @@
         <apidef name="masterfs">MasterFileSystem API</apidef>
     </apidefs>
     <changes>
+        <change id="canWrite">
+            <api name="masterfs"/>
+            <summary>Delegate FileObject.copy() to ProvidedExtensions</summary>
+            <version major="2" minor="29"/>
+            <date day="1" month="2" year="2011"/>
+            <author login="tstupka"/>
+            <compatibility addition="yes" binary="compatible" source="compatible" semantic="compatible" deprecation="no" deletion="no" modification="no"/>
+            <description>
+                Setup if an ProvidedExtensions instance should be used to determine a files canWrite() value
+            </description>
+            <class package="org.netbeans.modules.masterfs.providers" name="ProvidedExtensions"/>
+            <issue number="194683"/>
+        </change>
         <change id="copy-handler">
             <api name="masterfs"/>
             <summary>Delegate FileObject.copy() to ProvidedExtensions</summary>
Index: masterfs/src/org/netbeans/modules/masterfs/ProvidedExtensionsAccessor.java
--- masterfs/src/org/netbeans/modules/masterfs/ProvidedExtensionsAccessor.java Base (BASE)
+++ masterfs/src/org/netbeans/modules/masterfs/ProvidedExtensionsAccessor.java Locally New
@@ -0,0 +1,55 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2011 Oracle and/or its affiliates. All rights reserved.
+ *
+ * Oracle and Java are registered trademarks of Oracle and/or its affiliates.
+ * Other names may be trademarks of their respective owners.
+ *
+ * The contents of this file are subject to the terms of either the GNU
+ * General Public License Version 2 only ("GPL") or the Common
+ * Development and Distribution License("CDDL") (collectively, the
+ * "License"). You may not use this file except in compliance with the
+ * License. You can obtain a copy of the License at
+ * http://www.netbeans.org/cddl-gplv2.html
+ * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
+ * specific language governing permissions and limitations under the
+ * License.  When distributing the software, include this License Header
+ * Notice in each file and include the License file at
+ * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the GPL Version 2 section of the License file that
+ * accompanied this code. If applicable, add the following below the
+ * License Header, with the fields enclosed by brackets [] replaced by
+ * your own identifying information:
+ * "Portions Copyrighted [year] [name of copyright owner]"
+ *
+ * If you wish your version of this file to be governed by only the CDDL
+ * or only the GPL Version 2, indicate your decision by adding
+ * "[Contributor] elects to include this software in this distribution
+ * under the [CDDL or GPL Version 2] license." If you do not indicate a
+ * single choice of license, a recipient has the option to distribute
+ * your version of this file under either the CDDL, the GPL Version 2 or
+ * to extend the choice of license to its licensees as provided above.
+ * However, if you add GPL Version 2 code and therefore, elected the GPL
+ * Version 2 license, then the option applies only if the new code is
+ * made subject to such option by the copyright holder.
+ *
+ * Contributor(s):
+ *
+ * Portions Copyrighted 2011 Sun Microsystems, Inc.
+ */
+
+package org.netbeans.modules.masterfs;
+
+import org.netbeans.modules.masterfs.providers.ProvidedExtensions;
+
+/**
+ *
+ * @author Tomas Stupka
+ */
+public abstract class ProvidedExtensionsAccessor {
+    public static ProvidedExtensionsAccessor IMPL;
+    
+    protected abstract boolean providesCanWrite(ProvidedExtensions pe);
+}
Index: masterfs/src/org/netbeans/modules/masterfs/ProvidedExtensionsProxy.java
--- masterfs/src/org/netbeans/modules/masterfs/ProvidedExtensionsProxy.java Base (BASE)
+++ masterfs/src/org/netbeans/modules/masterfs/ProvidedExtensionsProxy.java Locally Modified (Based On LOCAL)
@@ -218,11 +218,19 @@
             if (iListener instanceof ProvidedExtensions) {
                 runCheckCode(new Runnable() {
                     public void run() {
+                        ProvidedExtensions extension = (ProvidedExtensions)iListener;
+                        if(ProvidedExtensionsAccessor.IMPL != null && 
+                           ProvidedExtensionsAccessor.IMPL.providesCanWrite(extension)) 
+                        {
                         ret[0] = ((ProvidedExtensions)iListener).canWrite(f);
                     }
+                    }
                 });                                                                                
+                if(ret[0] != null && ret[0]) {
+                    break;
             }
         }
+        }
         return ret[0] != null ? ret[0] : super.canWrite(f);
     }
         
Index: masterfs/src/org/netbeans/modules/masterfs/providers/ProvidedExtensions.java
--- masterfs/src/org/netbeans/modules/masterfs/providers/ProvidedExtensions.java Base (BASE)
+++ masterfs/src/org/netbeans/modules/masterfs/providers/ProvidedExtensions.java Locally Modified (Based On LOCAL)
@@ -48,6 +48,7 @@
 import java.io.IOException;
 import java.util.List;
 import java.util.concurrent.Callable;
+import org.netbeans.modules.masterfs.ProvidedExtensionsAccessor;
 import org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager;
 import org.openide.filesystems.FileObject;
 
@@ -69,6 +70,38 @@
 public class ProvidedExtensions implements InterceptionListener {
 
     /**
+     * true if this instance should be called to determine a files canWrite value, otherwise false
+     */
+    private final boolean providesCanWrite;
+
+    /**
+     * Creates a new ProvidedExtensions. 
+     * 
+     * @param providesCanWrite true if this instance is meant to 
+     *        determine a files {@link #canWrite()} value, otherwise false. 
+     * @since 2.29
+     *          
+     */
+    public ProvidedExtensions(boolean providesCanWrite) {
+        this.providesCanWrite = providesCanWrite;
+        if(ProvidedExtensionsAccessor.IMPL == null) {
+            ProvidedExtensionsAccessor.IMPL = new ProvidedExtensionsAccessor() {
+                @Override
+                protected boolean providesCanWrite(ProvidedExtensions pe) {
+                    return pe.providesCanWrite;
+                }
+            };
+        }     
+    }
+
+    /**
+     * Default constructor
+     */
+    public ProvidedExtensions() {
+        this(false);
+    }
+    
+    /**
      * Return instance of {@link ProvidedExtensions.IOHandler}
      * that is responsible for copying the file or null.
      *
Index: masterfs/test/unit/src/org/netbeans/modules/masterfs/providers/ProvidedExtensionsTest.java
--- masterfs/test/unit/src/org/netbeans/modules/masterfs/providers/ProvidedExtensionsTest.java Base (BASE)
+++ masterfs/test/unit/src/org/netbeans/modules/masterfs/providers/ProvidedExtensionsTest.java Locally Modified (Based On LOCAL)
@@ -615,6 +615,7 @@
         }
 
         public ProvidedExtensionsImpl(AnnotationProviderImpl p) {
+            super(true);
             this.provider = p;
             cnt++;
         }