001package org.xbib.elasticsearch.common.bytes;
002
003import org.apache.lucene.util.BytesRef;
004import org.apache.lucene.util.UnicodeUtil;
005import org.elasticsearch.ElasticsearchIllegalArgumentException;
006import org.elasticsearch.common.base.Charsets;
007import org.elasticsearch.common.io.stream.BytesStreamInput;
008import org.elasticsearch.common.io.stream.StreamInput;
009import org.jboss.netty.buffer.ChannelBuffer;
010import org.jboss.netty.buffer.ChannelBuffers;
011
012import java.io.IOException;
013import java.io.OutputStream;
014import java.nio.ByteBuffer;
015import java.nio.channels.GatheringByteChannel;
016import java.util.Arrays;
017
018/**
019 * BytesArray for un-relocated netty.
020 */
021public class BytesArray implements BytesReference {
022
023    private byte[] bytes;
024    private int offset;
025    private int length;
026
027    public BytesArray(String bytes) {
028        BytesRef bytesRef = new BytesRef();
029        UnicodeUtil.UTF16toUTF8(bytes, 0, bytes.length(), bytesRef);
030        this.bytes = bytesRef.bytes;
031        this.offset = bytesRef.offset;
032        this.length = bytesRef.length;
033    }
034
035    public BytesArray(BytesRef bytesRef) {
036        this(bytesRef, false);
037    }
038
039    public BytesArray(BytesRef bytesRef, boolean deepCopy) {
040        if (deepCopy) {
041            BytesRef copy = BytesRef.deepCopyOf(bytesRef);
042            bytes = copy.bytes;
043            offset = copy.offset;
044            length = copy.length;
045        } else {
046            bytes = bytesRef.bytes;
047            offset = bytesRef.offset;
048            length = bytesRef.length;
049        }
050    }
051
052    public BytesArray(byte[] bytes) {
053        this.bytes = bytes;
054        this.offset = 0;
055        this.length = bytes.length;
056    }
057
058    public BytesArray(byte[] bytes, int offset, int length) {
059        this.bytes = bytes;
060        this.offset = offset;
061        this.length = length;
062    }
063
064    @Override
065    public byte get(int index) {
066        return bytes[offset + index];
067    }
068
069    @Override
070    public int length() {
071        return length;
072    }
073
074    @Override
075    public BytesReference slice(int from, int length) {
076        if (from < 0 || (from + length) > this.length) {
077            throw new ElasticsearchIllegalArgumentException("can't slice a buffer with length [" + this.length + "], with slice parameters from [" + from + "], length [" + length + "]");
078        }
079        return new BytesArray(bytes, offset + from, length);
080    }
081
082    @Override
083    public StreamInput streamInput() {
084        return new BytesStreamInput(bytes, offset, length, false);
085    }
086
087    @Override
088    public void writeTo(OutputStream os) throws IOException {
089        os.write(bytes, offset, length);
090    }
091
092    @Override
093    public void writeTo(GatheringByteChannel channel) throws IOException {
094        channel.write(ByteBuffer.wrap(bytes, offset, length()));
095    }
096
097    @Override
098    public byte[] toBytes() {
099        if (offset == 0 && bytes.length == length) {
100            return bytes;
101        }
102        return Arrays.copyOfRange(bytes, offset, offset + length);
103    }
104
105    @Override
106    public BytesArray toBytesArray() {
107        return this;
108    }
109
110    @Override
111    public BytesArray copyBytesArray() {
112        return new BytesArray(Arrays.copyOfRange(bytes, offset, offset + length));
113    }
114
115    @Override
116    public ChannelBuffer toChannelBuffer() {
117        return ChannelBuffers.wrappedBuffer(bytes, offset, length);
118    }
119
120    @Override
121    public boolean hasArray() {
122        return true;
123    }
124
125    @Override
126    public byte[] array() {
127        return bytes;
128    }
129
130    @Override
131    public int arrayOffset() {
132        return offset;
133    }
134
135    @Override
136    public String toUtf8() {
137        if (length == 0) {
138            return "";
139        }
140        return new String(bytes, offset, length, Charsets.UTF_8);
141    }
142
143    @Override
144    public BytesRef toBytesRef() {
145        return new BytesRef(bytes, offset, length);
146    }
147
148    @Override
149    public BytesRef copyBytesRef() {
150        return new BytesRef(Arrays.copyOfRange(bytes, offset, offset + length));
151    }
152
153    @Override
154    public int hashCode() {
155        return Helper.bytesHashCode(this);
156    }
157
158    @Override
159    public boolean equals(Object obj) {
160        return Helper.bytesEqual(this, (BytesReference) obj);
161    }
162}