xml/dom-impl/src/com/intellij/util/xml/stubs/ElementStubSerializer.java

/*
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * 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 com.intellij.util.xml.stubs;

import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.stubs.IndexSink;
import com.intellij.psi.stubs.ObjectStubSerializer;
import com.intellij.psi.stubs.StubInputStream;
import com.intellij.psi.stubs.StubOutputStream;
import com.intellij.util.xml.stubs.index.DomElementClassIndex;
import com.intellij.util.xml.stubs.index.DomNamespaceKeyIndex;
import org.jetbrains.annotations.NotNull;

import java.io.IOException;

/**
 * @author Dmitry Avdeev
 *         Date: 8/3/12
 */
public class ElementStubSerializer implements ObjectStubSerializer<ElementStub, ElementStub> {

  final static ObjectStubSerializer INSTANCE = new ElementStubSerializer();

  @Override
  public void serialize(@NotNull ElementStub stub, @NotNull StubOutputStream dataStream) throws IOException {
    dataStream.writeName(stub.getName());
    dataStream.writeName(stub.getNamespaceKey());
    dataStream.writeVarInt(stub.getIndex());
    dataStream.writeBoolean(stub.isCustom());
    dataStream.writeName(stub.getElementClass());
  }

  @NotNull
  @Override
  public ElementStub deserialize(@NotNull StubInputStream dataStream, ElementStub parentStub) throws IOException {
    return new ElementStub(parentStub, dataStream.readName(), dataStream.readName(),
                           dataStream.readVarInt(), dataStream.readBoolean(), dataStream.readName());
  }

  @Override
  public void indexStub(@NotNull ElementStub stub, @NotNull IndexSink sink) {
    final String namespaceKey = stub.getNamespaceKey();
    if (StringUtil.isNotEmpty(namespaceKey)) {
      sink.occurrence(DomNamespaceKeyIndex.KEY, namespaceKey);
    }

    final String elementClass = stub.getElementClass();
    if (elementClass != null) {
      sink.occurrence(DomElementClassIndex.KEY, elementClass);
    }
  }

  @NotNull
  @Override
  public String getExternalId() {
    return "ElementStubSerializer";
  }

  @Override
  public String toString() {
    return "Element";
  }
}