Copyright (c) 2000, 2009 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2009 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.core.util;

import org.eclipse.jdt.core.util.ClassFormatException;
import org.eclipse.jdt.core.util.IClassFileAttribute;
import org.eclipse.jdt.core.util.IConstantPool;
import org.eclipse.jdt.core.util.IConstantPoolConstant;
import org.eclipse.jdt.core.util.IConstantPoolEntry;

Default implementation of IClassFileAttribute
/**
 * Default implementation of IClassFileAttribute
 */
public class ClassFileAttribute extends ClassFileStruct implements IClassFileAttribute {
	public static final IClassFileAttribute[] NO_ATTRIBUTES = new IClassFileAttribute[0];
	private long attributeLength;
	private int attributeNameIndex;
	private char[] attributeName;

	public ClassFileAttribute(byte[] classFileBytes, IConstantPool constantPool, int offset) throws ClassFormatException {
		this.attributeNameIndex = u2At(classFileBytes, 0, offset);
		this.attributeLength = u4At(classFileBytes, 2, offset);
		IConstantPoolEntry constantPoolEntry = constantPool.decodeEntry(this.attributeNameIndex);
		if (constantPoolEntry.getKind() != IConstantPoolConstant.CONSTANT_Utf8) {
			throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
		}
		this.attributeName = constantPoolEntry.getUtf8Value();
	}

	@Override
	public int getAttributeNameIndex() {
		return this.attributeNameIndex;
	}

	
See Also:
getAttributeName.getAttributeName()/**
	 * @see IClassFileAttribute#getAttributeName()
	 */
	@Override
	public char[] getAttributeName() {
		return this.attributeName;
	}

	
See Also:
getAttributeLength.getAttributeLength()/**
	 * @see IClassFileAttribute#getAttributeLength()
	 */
	@Override
	public long getAttributeLength() {
		return this.attributeLength;
	}

}