Creates a delegate for CompilationResult for use by third party linkers.

Review at http://gwt-code-reviews.appspot.com/1451808


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10266 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/dev/core/src/com/google/gwt/core/ext/linker/DelegatingCompilationResult.java b/dev/core/src/com/google/gwt/core/ext/linker/DelegatingCompilationResult.java
new file mode 100644
index 0000000..687cecd
--- /dev/null
+++ b/dev/core/src/com/google/gwt/core/ext/linker/DelegatingCompilationResult.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2011 Google Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.gwt.core.ext.linker;
+
+import com.google.gwt.core.ext.Linker;
+
+import java.util.SortedMap;
+import java.util.SortedSet;
+
+/**
+ * A delegate for {@link CompilationResult} intended for third party linkers
+ * that want to modify a compilation result.  Extending this class should insulate
+ * against future changes to the CompilationResult type.
+ */
+public class DelegatingCompilationResult extends CompilationResult {
+  private final CompilationResult delegate;
+
+  public DelegatingCompilationResult(Class<? extends Linker> linkerType,
+      CompilationResult compilationResult) {
+    super(linkerType);
+    this.delegate = compilationResult;
+  }
+
+  @Override
+  public String[] getJavaScript() {
+    return delegate.getJavaScript();
+  }
+
+  @Override
+  public int getPermutationId() {
+    return delegate.getPermutationId();
+  }
+
+  @Override
+  public SortedSet<SortedMap<SelectionProperty, String>> getPropertyMap() {
+    return delegate.getPropertyMap();
+  }
+
+  @Override
+  public SoftPermutation[] getSoftPermutations() {
+    return delegate.getSoftPermutations();
+  }
+
+  @Override
+  public StatementRanges[] getStatementRanges() {
+    return delegate.getStatementRanges();
+  }
+
+  @Override
+  public String getStrongName() {
+    return delegate.getStrongName();
+  }
+
+  @Override
+  public SymbolData[] getSymbolMap() {
+    return delegate.getSymbolMap();
+  }
+
+  @Override
+  public String toString() {
+    return delegate.toString();
+  }
+}