platform/lang-impl/src/com/intellij/util/indexing/ByteSequenceDataExternalizer.java

/*
 * Copyright 2000-2014 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.indexing;

import com.intellij.openapi.util.io.ByteSequence;
import com.intellij.util.io.DataExternalizer;
import org.jetbrains.annotations.NotNull;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.io.InputStream;

/**
* Created by Maxim.Mossienko on 5/7/2014.
*/
class ByteSequenceDataExternalizer implements DataExternalizer<ByteSequence> {
  static final ByteSequenceDataExternalizer INSTANCE = new ByteSequenceDataExternalizer();
  @Override
  public void save(@NotNull DataOutput out, ByteSequence value) throws IOException {
    out.write(value.getBytes(), value.getOffset(), value.getLength()); // todo fix double copying
  }

  @Override
  public ByteSequence read(@NotNull DataInput in) throws IOException {
    byte[] buf = new byte[((InputStream)in).available()]; // todo fix double copying
    in.readFully(buf);
    return new ByteSequence(buf);
  }
}