org.aspectj/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/FieldInstruction.java

package org.aspectj.apache.bcel.generic;

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 * reserved.
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 * modification, are permitted provided that the following conditions
 * are met:
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 *    notice, this list of conditions and the following disclaimer.
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 *    if any, must include the following acknowledgment:
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 *        Apache Software Foundation (https://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 *    "Apache BCEL" must not be used to endorse or promote products
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 * information on the Apache Software Foundation, please see
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import org.aspectj.apache.bcel.classfile.ConstantPool;

/**
 * Super class for the GET/PUTxxx family of instructions.
 *
 * @version $Id: FieldInstruction.java,v 1.7 2009/10/05 17:35:36 aclement Exp $
 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
 */
public class FieldInstruction extends FieldOrMethod {

	public FieldInstruction(short opcode, int index) {
		super(opcode, index);
	}

	public String toString(ConstantPool cp) {
		return org.aspectj.apache.bcel.Constants.OPCODE_NAMES[opcode] + " "
				+ cp.constantToString(index, org.aspectj.apache.bcel.Constants.CONSTANT_Fieldref);
	}

	/**
	 * @return size of field (1 or 2)
	 */
	protected int getFieldSize(ConstantPool cpg) {
		return Type.getTypeSize(getSignature(cpg));
	}

	public Type getType(ConstantPool cpg) {
		return getFieldType(cpg);
	}

	public Type getFieldType(ConstantPool cpg) {
		return Type.getType(getSignature(cpg));
	}

	public String getFieldName(ConstantPool cpg) {
		return getName(cpg);
	}

	public int produceStack(ConstantPool cpg) {
		if (!isStackProducer()) {
			return 0;
		}

		return getFieldSize(cpg); // SAME FOR GETFIELD/GETSTATIC
	}

	public int consumeStack(ConstantPool cpg) {
		if (!isStackConsumer()) {
			return 0;
		}
		if (opcode == GETFIELD) {
			return 1;
		}
		return getFieldSize(cpg) + (opcode == PUTFIELD ? 1 : 0);
	}
}