content: /*
   * Copyright (C) 2011 The Android Open Source Project
   *
   * 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 android.filterfw.io;
  
  import android.content.Context;
  import android.filterfw.core.FilterGraph;
  import android.filterfw.core.KeyValueMap;
  import android.filterfw.io.GraphIOException;
  
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.IOException;
  import java.io.StringWriter;
  
  /**
   * @hide
   */
  public abstract class GraphReader {
  
      protected KeyValueMap mReferences = new KeyValueMap();
  
      public abstract FilterGraph readGraphString(String graphString) throws GraphIOException;
  
      public abstract KeyValueMap readKeyValueAssignments(String assignments) throws GraphIOException;
  
      public FilterGraph readGraphResource(Context context, int resourceId) throws GraphIOException {
          InputStream inputStream = context.getResources().openRawResource(resourceId);
          InputStreamReader reader = new InputStreamReader(inputStream);
          StringWriter writer = new StringWriter();
          char[] buffer = new char[1024];
          try {
              int bytesRead;
              while ((bytesRead = reader.read(buffer, 0, 1024)) > 0) {
                  writer.write(buffer, 0, bytesRead);
              }
          } catch (IOException e) {
              throw new RuntimeException("Could not read specified resource file!");
          }
          return readGraphString(writer.toString());
      }
  
      public void addReference(String name, Object object) {
          mReferences.put(name, object);
      }
  
      public void addReferencesByMap(KeyValueMap refs) {
          mReferences.putAll(refs);
      }
  
      public void addReferencesByKeysAndValues(Object... references) {
          mReferences.setKeyValues(references);
      }
  
  }
  