org.apache.mina.util.byteaccess.AbstractByteArray Maven / Gradle / Ivy
/**
* Copyright 2007-2015, Kaazing Corporation. All rights reserved.
*
* 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 org.apache.mina.util.byteaccess;
/**
*
* Abstract class that implements {@link ByteArray}. This class will only be
* used internally and should not be used by end users.
*
* @author Apache MINA Project
*/
abstract class AbstractByteArray implements ByteArray
{
/**
* @inheritDoc
*/
public final int length()
{
return last() - first();
}
/**
* @inheritDoc
*/
@Override
public final boolean equals( Object other )
{
// Optimization: compare pointers.
if ( other == this )
{
return true;
}
// Compare types.
if ( !( other instanceof ByteArray ) )
{
return false;
}
ByteArray otherByteArray = ( ByteArray ) other;
// Compare properties.
if ( first() != otherByteArray.first() || last() != otherByteArray.last()
|| !order().equals( otherByteArray.order() ) )
{
return false;
}
// Compare bytes.
Cursor cursor = cursor();
Cursor otherCursor = otherByteArray.cursor();
for ( int remaining = cursor.getRemaining(); remaining > 0; )
{
// Optimization: prefer int comparisons over byte comparisons
if ( remaining >= 4 )
{
int i = cursor.getInt();
int otherI = otherCursor.getInt();
if ( i != otherI )
{
return false;
}
}
else
{
byte b = cursor.get();
byte otherB = otherCursor.get();
if ( b != otherB )
{
return false;
}
}
}
return true;
}
}