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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common.bytes;
import java.nio.charset.StandardCharsets;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.io.Channels;
import org.elasticsearch.common.io.stream.StreamInput;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.channels.GatheringByteChannel;
import java.util.Arrays;
public class BytesArray implements BytesReference {
public static final BytesArray EMPTY = new BytesArray(BytesRef.EMPTY_BYTES, 0, 0);
private byte[] bytes;
private int offset;
private int length;
public BytesArray(String bytes) {
BytesRef bytesRef = new BytesRef(bytes);
this.bytes = bytesRef.bytes;
this.offset = bytesRef.offset;
this.length = bytesRef.length;
}
public BytesArray(BytesRef bytesRef) {
this(bytesRef, false);
}
public BytesArray(BytesRef bytesRef, boolean deepCopy) {
if (deepCopy) {
BytesRef copy = BytesRef.deepCopyOf(bytesRef);
bytes = copy.bytes;
offset = copy.offset;
length = copy.length;
} else {
bytes = bytesRef.bytes;
offset = bytesRef.offset;
length = bytesRef.length;
}
}
public BytesArray(byte[] bytes) {
this.bytes = bytes;
this.offset = 0;
this.length = bytes.length;
}
public BytesArray(byte[] bytes, int offset, int length) {
this.bytes = bytes;
this.offset = offset;
this.length = length;
}
@Override
public byte get(int index) {
return bytes[offset + index];
}
@Override
public int length() {
return length;
}
@Override
public BytesReference slice(int from, int length) {
if (from < 0 || (from + length) > this.length) {
throw new IllegalArgumentException("can't slice a buffer with length [" + this.length + "], with slice parameters from [" + from + "], length [" + length + "]");
}
return new BytesArray(bytes, offset + from, length);
}
@Override
public StreamInput streamInput() {
return StreamInput.wrap(bytes, offset, length);
}
@Override
public void writeTo(OutputStream os) throws IOException {
os.write(bytes, offset, length);
}
@Override
public void writeTo(GatheringByteChannel channel) throws IOException {
Channels.writeToChannel(bytes, offset, length(), channel);
}
@Override
public byte[] toBytes() {
if (offset == 0 && bytes.length == length) {
return bytes;
}
return Arrays.copyOfRange(bytes, offset, offset + length);
}
@Override
public BytesArray toBytesArray() {
return this;
}
@Override
public BytesArray copyBytesArray() {
return new BytesArray(Arrays.copyOfRange(bytes, offset, offset + length));
}
@Override
public ChannelBuffer toChannelBuffer() {
return ChannelBuffers.wrappedBuffer(bytes, offset, length);
}
@Override
public boolean hasArray() {
return true;
}
@Override
public byte[] array() {
return bytes;
}
@Override
public int arrayOffset() {
return offset;
}
@Override
public String toUtf8() {
if (length == 0) {
return "";
}
return new String(bytes, offset, length, StandardCharsets.UTF_8);
}
@Override
public BytesRef toBytesRef() {
return new BytesRef(bytes, offset, length);
}
@Override
public BytesRef copyBytesRef() {
return new BytesRef(Arrays.copyOfRange(bytes, offset, offset + length));
}
@Override
public int hashCode() {
return Helper.bytesHashCode(this);
}
@Override
public boolean equals(Object obj) {
return Helper.bytesEqual(this, (BytesReference) obj);
}
}
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