1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Eclipse Public License, Version 1.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.eclipse.org/org/documents/epl-v10.php 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.ide.eclipse.adt.internal.build.builders; 18 19 import com.android.sdklib.SdkConstants; 20 21 import org.eclipse.core.resources.IResource; 22 import org.eclipse.core.resources.IResourceDelta; 23 import org.eclipse.core.resources.IResourceDeltaVisitor; 24 import org.eclipse.core.runtime.CoreException; 25 import org.eclipse.core.runtime.IPath; 26 27 /** 28 * Delta visitor specifically for Library resources. 29 * The goal is to detect library resource/library changes when compiling the main project 30 * and trigger a resource recompilation/repackaging. 31 * 32 */ 33 public class LibraryDeltaVisitor implements IResourceDeltaVisitor { 34 35 private boolean mResChange = false; 36 private boolean mLibChange = false; 37 getResChange()38 public boolean getResChange() { 39 return mResChange; 40 } 41 getLibChange()42 public boolean getLibChange() { 43 return mLibChange; 44 } 45 visit(IResourceDelta delta)46 public boolean visit(IResourceDelta delta) throws CoreException { 47 // we are only going to look for changes in res/ 48 // Since the delta visitor goes through the main 49 // folder before its children we can check when the path segment 50 // count is 2 (format will be /$Project/folder) and make sure we are 51 // processing res/ 52 53 IResource resource = delta.getResource(); 54 IPath path = resource.getFullPath(); 55 String[] segments = path.segments(); 56 57 // since the delta visitor also visits the root we return true if 58 // segments.length = 1 59 if (segments.length == 1) { 60 // this is always the Android project since we call 61 // Builder#getDelta(IProject) on the project itself. 62 return true; 63 } else if (segments.length == 2) { 64 if (SdkConstants.FD_RESOURCES.equalsIgnoreCase(segments[1])) { 65 // res folder was changed! 66 // This is all that matters, we can stop (return false below) 67 mResChange = true; 68 } else if (SdkConstants.FD_NATIVE_LIBS.equalsIgnoreCase(segments[1])) { 69 // libs folder was changed. 70 // This is all that matters, we can stop (return false below) 71 mLibChange = true; 72 } 73 } 74 75 return false; 76 } 77 } 78