MuteDocumentFactory.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.waveprotocol.wave.model.wave.data;

import org.waveprotocol.wave.model.schema.SchemaProvider;
import org.waveprotocol.wave.model.wave.data.impl.ObservablePluggableMutableDocument;

import org.waveprotocol.wave.model.document.ObservableDocument;
import org.waveprotocol.wave.model.document.operation.DocInitialization;
import org.waveprotocol.wave.model.id.WaveletId;
import org.waveprotocol.wave.model.operation.SilentOperationSink;

/**
 * A document factory that produces a document operation sink which will just
 * swallow any outgoing mutation ops.
 *
 * A {@link DocumentOperationSink} produced by this factory provides an
 * {@link ObservableDocument}.
 *
 */
public class MuteDocumentFactory implements DocumentFactory<DocumentOperationSink> {
  private final DocumentFactory<? extends ObservablePluggableMutableDocument> factory;

  public MuteDocumentFactory(SchemaProvider schemas) {
    this.factory = ObservablePluggableMutableDocument.createFactory(schemas);
  }

  @Override
  public DocumentOperationSink create(WaveletId waveletId, String docId,
      DocInitialization content) {
    ObservablePluggableMutableDocument doc = factory.create(waveletId, docId, content);
    doc.init(SilentOperationSink.VOID);
    return doc;
  }
}