Replace parsed and resolved maps with cache interface

editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/analysis/SelectiveCacheAdapter.java

Index: editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/analysis/SelectiveCacheAdapter.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/analysis/SelectiveCacheAdapter.java	(revision 0)
+++ editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/analysis/SelectiveCacheAdapter.java	(revision 0)
@@ -0,0 +1,64 @@
+package com.google.dart.tools.core.analysis;
+
+import com.google.dart.compiler.DartCompiler.SelectiveCache;
+import com.google.dart.compiler.DartSource;
+import com.google.dart.compiler.SystemLibraryManager;
+import com.google.dart.compiler.ast.DartUnit;
+import com.google.dart.compiler.ast.LibraryUnit;
+import com.google.dart.tools.core.internal.model.SystemLibraryManagerProvider;
+
+import java.net.URI;
+import java.util.HashSet;
+import java.util.Map;
+
+final class SelectiveCacheAdapter extends SelectiveCache {
+  private final Context context;
+  private final HashSet<URI> parsedUnitURIs;
+
+  SelectiveCacheAdapter(Context context) {
+    this.context = context;
+    this.parsedUnitURIs = new HashSet<URI>();
+  }
+
+  @Override
+  public Map<URI, LibraryUnit> getResolvedLibraries() {
+    return context.getResolvedLibraries();
+  }
+
+  @Override
+  public DartUnit getUnresolvedDartUnit(DartSource dartSrc) {
+
+    // Remove the parsed unit from the map if present
+    // so that it will not be consumed a 2nd time if it is sourced by multiple libraries
+
+    URI srcUri = dartSrc.getUri();
+    DartUnit dartUnit = context.getUnresolvedUnits().remove(srcUri);
+    if (dartUnit != null) {
+      return dartUnit;
+    }
+    SystemLibraryManager libraryManager = SystemLibraryManagerProvider.getSystemLibraryManager();
+    URI fileUri = libraryManager.resolveDartUri(srcUri);
+    dartUnit = context.getUnresolvedUnits().remove(fileUri);
+    if (dartUnit != null) {
+      return dartUnit;
+    }
+
+    // If the desired unit is not cached, record the fact that it was requested
+    // so that later we can notify others that it was parsed as part of this process
+
+    parsedUnitURIs.add(srcUri);
+    if (fileUri != null) {
+      parsedUnitURIs.add(fileUri);
+    }
+    return null;
+  }
+
+  /**
+   * Answer the URIs for the files that were parsed during the resolution process
+   * 
+   * @return a collection of URIs (not <code>null</code>, contains no <code>null</code>s)
+   */
+  HashSet<URI> getParsedUnitURIs() {
+    return parsedUnitURIs;
+  }
+}