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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.apache.qpid.transport;
/**
* Binary
*
*/
public final class Binary
{
private byte[] bytes;
private int offset;
private int size;
private int hash = 0;
public Binary(byte[] bytes, int offset, int size)
{
if (offset + size > bytes.length)
{
throw new ArrayIndexOutOfBoundsException();
}
this.bytes = bytes;
this.offset = offset;
this.size = size;
}
public Binary(byte[] bytes)
{
this(bytes, 0, bytes.length);
}
public final byte[] array()
{
return bytes;
}
public final int offset()
{
return offset;
}
public final int size()
{
return size;
}
public final Binary slice(int low, int high)
{
int sz;
if (high < 0)
{
sz = size + high;
}
else
{
sz = high - low;
}
if (sz < 0)
{
sz = 0;
}
return new Binary(bytes, offset + low, sz);
}
public final int hashCode()
{
if (hash == 0)
{
int hc = 0;
for (int i = 0; i < size; i++)
{
hc = 31*hc + (0xFF & bytes[offset + i]);
}
hash = hc;
}
return hash;
}
public final boolean equals(Object o)
{
if (!(o instanceof Binary))
{
return false;
}
Binary buf = (Binary) o;
if (this.size != buf.size)
{
return false;
}
for (int i = 0; i < size; i++)
{
if (bytes[offset + i] != buf.bytes[buf.offset + i])
{
return false;
}
}
return true;
}
}
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