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.IConstantPool;
import org.eclipse.jdt.core.util.IConstantPoolConstant;
import org.eclipse.jdt.core.util.IConstantPoolEntry;
import org.eclipse.jdt.core.util.ISignatureAttribute;

Since:
3.0/**
 * @since 3.0
 */
public class SignatureAttribute extends ClassFileAttribute implements ISignatureAttribute {

	private int signatureIndex;
	private char[] signature;

	SignatureAttribute(byte[] classFileBytes, IConstantPool constantPool, int offset) throws ClassFormatException {
		super(classFileBytes, constantPool, offset);
		final int index = u2At(classFileBytes, 6, offset);
		this.signatureIndex = index;
		IConstantPoolEntry constantPoolEntry = constantPool.decodeEntry(index);
		if (constantPoolEntry.getKind() != IConstantPoolConstant.CONSTANT_Utf8) {
			throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
		}
		this.signature = constantPoolEntry.getUtf8Value();
	}

	@Override
	public int getSignatureIndex() {
		return this.signatureIndex;
	}

	@Override
	public char[] getSignature() {
		return this.signature;
	}
}