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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/* *******************************************************************
 * Copyright (c) 2004 IBM
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *     Andy Clement -     initial implementation
 * ******************************************************************/

package org.aspectj.apache.bcel.classfile.annotation;

import java.io.DataOutputStream;
import java.io.IOException;

import org.aspectj.apache.bcel.classfile.ConstantPool;

public class NameValuePair {
	private int nameIdx;
	private ElementValue value;
	private ConstantPool cpool;

	public NameValuePair(NameValuePair pair, ConstantPool cpool, boolean copyPoolEntries) {
		this.cpool = cpool;
		// J5ASSERT:
		// Could assert nvp.getNameString() points to the same thing as cpool.getConstant(nvp.getNameIndex())
		// if (!nvp.getNameString().equals(((ConstantUtf8)cpool.getConstant(nvp.getNameIndex())).getBytes())) {
		// throw new RuntimeException("envp buggered");
		// }
		if (copyPoolEntries) {
			nameIdx = cpool.addUtf8(pair.getNameString());
		} else {
			nameIdx = pair.getNameIndex();
		}
		value = ElementValue.copy(pair.getValue(), cpool, copyPoolEntries);
	}

	protected NameValuePair(int idx, ElementValue value, ConstantPool cpool) {
		this.nameIdx = idx;
		this.value = value;
		this.cpool = cpool;
	}

	public NameValuePair(String name, ElementValue value, ConstantPool cpool) {
		this.nameIdx = cpool.addUtf8(name);
		this.value = value;
		this.cpool = cpool;
	}

	protected void dump(DataOutputStream dos) throws IOException {
		dos.writeShort(nameIdx); // u2 name of the element
		value.dump(dos);
	}

	public int getNameIndex() {
		return nameIdx;
	}

	public final String getNameString() {
		return cpool.getConstantUtf8(nameIdx).getValue();
	}

	public final ElementValue getValue() {
		return value;
	}

	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append(getNameString()).append("=").append(value.stringifyValue());
		return sb.toString();
	}
}