Version 1.5.6

dart/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/index/file/IndexNode.java

+/*
+ * Copyright (c) 2014, the Dart project authors.
+ * 
+ * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
+ * 
+ * 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.dart.engine.internal.index.file;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import com.google.dart.engine.context.AnalysisContext;
+import com.google.dart.engine.element.Element;
+import com.google.dart.engine.index.Location;
+import com.google.dart.engine.index.Relationship;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * A single index file in-memory presentation.
+ * 
+ * @coverage dart.engine.index
+ */
+public class IndexNode {
+  private final AnalysisContext context;
+  private final ElementCodec elementCodec;
+  private final RelationshipCodec relationshipCodec;
+  private final Map<RelationKeyData, List<LocationData>> relations = Maps.newHashMap();
+
+  public IndexNode(AnalysisContext context, ElementCodec elementCodec,
+      RelationshipCodec relationshipCodec) {
+    this.context = context;
+    this.elementCodec = elementCodec;
+    this.relationshipCodec = relationshipCodec;
+  }
+
+  /**
+   * Returns the {@link AnalysisContext} this node is created for.
+   */
+  public AnalysisContext getContext() {
+    return context;
+  }
+
+  /**
+   * Returns number of locations in this node.
+   */
+  public int getLocationCount() {
+    int locationCount = 0;
+    for (List<LocationData> locations : relations.values()) {
+      locationCount += locations.size();
+    }
+    return locationCount;
+  }
+
+  /**
+   * Returns the recorded relations.
+   */
+  public Map<RelationKeyData, List<LocationData>> getRelations() {
+    return relations;
+  }
+
+  /**
+   * Return the locations of the elements that have the given relationship with the given element.
+   * 
+   * @param element the the element that has the relationship with the locations to be returned
+   * @param relationship the {@link Relationship} between the given element and the locations to be
+   *          returned
+   */
+  public Location[] getRelationships(Element element, Relationship relationship) {
+    // prepare key
+    RelationKeyData key = new RelationKeyData(
+        elementCodec,
+        relationshipCodec,
+        element,
+        relationship);
+    // find LocationData(s)
+    List<LocationData> locationDatas = relations.get(key);
+    if (locationDatas == null) {
+      return Location.EMPTY_ARRAY;
+    }
+    // convert to Location(s)
+    List<Location> locations = Lists.newArrayList();
+    for (LocationData locationData : locationDatas) {
+      Location location = locationData.getLocation(context, elementCodec);
+      if (location != null) {
+        locations.add(location);
+      }
+    }
+    return locations.toArray(new Location[locations.size()]);
+  }
+
+  /**
+   * Records that the given element and location have the given relationship.
+   * 
+   * @param element the element that is related to the location
+   * @param relationship the {@link Relationship} between the element and the location
+   * @param location the {@link Location} where relationship happens
+   */
+  public void recordRelationship(Element element, Relationship relationship, Location location) {
+    RelationKeyData key = new RelationKeyData(
+        elementCodec,
+        relationshipCodec,
+        element,
+        relationship);
+    // prepare LocationData(s)
+    List<LocationData> locationDatas = relations.get(key);
+    if (locationDatas == null) {
+      locationDatas = Lists.newArrayList();
+      relations.put(key, locationDatas);
+    }
+    // add new LocationData
+    locationDatas.add(new LocationData(elementCodec, location));
+  }
+
+  /**
+   * Sets relations data. This method is used during loading data from a storage.
+   */
+  public void setRelations(Map<RelationKeyData, List<LocationData>> relations) {
+    this.relations.clear();
+    this.relations.putAll(relations);
+  }
+}