corpus-server/src/main/java/org/apache/opennlp/corpus_server/store/MemoryCorpusStore.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.apache.opennlp.corpus_server.store;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.apache.opennlp.corpus_server.UimaUtil;
import org.apache.uima.cas.CAS;
import org.apache.uima.resource.metadata.TypeSystemDescription;

/**
 * Dummy in memory corpus store.
 */
public class MemoryCorpusStore implements CorpusStore {

  private final String corpusName;
  private final TypeSystemDescription typeSystem;
  private byte[] indexMapping;

  private Map<String, byte[]> casStore = new HashMap<String, byte[]>();

  MemoryCorpusStore(String corpusName, TypeSystemDescription typeSystem,
      byte[] indexMapping) {
    this.corpusName = corpusName;
    this.typeSystem = typeSystem;
    this.indexMapping = indexMapping;
  }

  @Override
  public String getCorpusId() {
    return corpusName;
  }

  public byte[] getCAS(String casId) {
    return casStore.get(casId);
  }

  // TODO: Add exception declaration to propagte errors back to client ...
  public void addCAS(String casID, byte[] content) {

    // Note:
    // Directly store data as xmi, but deserialization is needed to index and
    // validate it!

    CAS cas = UimaUtil.createEmptyCAS(typeSystem);

    try {
      UimaUtil.deserializeXmiCAS(cas, new ByteArrayInputStream(content));
    } catch (IOException e) {
      // TODO: Send error back to client ...
      e.printStackTrace();
    }

    casStore.put(casID, content);
  }

  @Override
  public void updateCAS(String casID, byte[] content) throws IOException {
    addCAS(casID, content);
  }

  public TypeSystemDescription getTypeSystem() {
    return typeSystem;
  }

  @Override
  public byte[] getIndexMapping() throws IOException {
    return indexMapping;
  }
}