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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.text;
import java.nio.ByteBuffer;
/**
* This is a primitive class that owns an array of utf8 encoded string.
* This is a class that has speed as its primary purpose.
* If you have a string, consider Utf8String
* If you have a large backing array consider Utf8PartialArray.
*
* @author baldersheim
*/
public class Utf8Array extends AbstractUtf8Array {
protected final byte[] utf8;
/**
* This will simply wrap the given array assuming it is valid utf8.
* Note that the immutability of this primitive class depends on that the buffer
* is not modified after ownership has been transferred.
* @param utf8data The utf8 byte sequence.
*/
public Utf8Array(final byte[] utf8data) {
utf8 = utf8data;
}
/**
* This will create a new array from the window given. No validation done.
* Note that this will copy data. You might also want to consider Utf8PartialArray
* @param utf8data The base array.
* @param offset The offset from where to copy from
* @param length The number of bytes that should be copied.
*/
public Utf8Array(byte[] utf8data, int offset, int length) {
this.utf8 = new byte[length];
System.arraycopy(utf8data, offset, this.utf8, 0, length);
}
/**
* This will fetch length bytes from the given buffer.
* @param buf The ByteBuffer to read from
* @param length number of bytes to read
*/
public Utf8Array(ByteBuffer buf, int length) {
this.utf8 = new byte[length];
buf.get(this.utf8, 0, length);
}
@Override
public byte[] getBytes() {
return utf8;
}
@Override
public int getByteLength() {
return utf8.length;
}
@Override
protected int getByteOffset() {
return 0;
}
}
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