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

package org.aspectj.apache.bcel.generic;

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

import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.util.ByteSequence;

/**
 * LOOKUPSWITCH - Switch with unordered set of values
 *
 * @version $Id: LOOKUPSWITCH.java,v 1.5 2011/04/05 15:15:33 aclement Exp $
 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
 */
public class LOOKUPSWITCH extends InstructionSelect {

	public LOOKUPSWITCH(int[] match, InstructionHandle[] targets, InstructionHandle target) {
		super(LOOKUPSWITCH, match, targets, target);
		// Alignment remainer assumed 0 here, until dump time
		length = (short) (9 + matchLength * 8);
		fixedLength = length;
	}

	/**
	 * Dump instruction as byte code to stream out.
	 *
	 * @param out Output stream
	 */
	public void dump(DataOutputStream out) throws IOException {
		super.dump(out);
		out.writeInt(matchLength); // npairs

		for (int i = 0; i < matchLength; i++) {
			out.writeInt(match[i]); // match-offset pairs
			out.writeInt(indices[i] = getTargetOffset(targets[i]));
		}
	}

	/**
	 * Read needed data (e.g. index) from file.
	 */
	public LOOKUPSWITCH(ByteSequence bytes) throws IOException {
		super(Constants.LOOKUPSWITCH, bytes); // reads padding

		matchLength = bytes.readInt();
		fixedLength = (short) (9 + matchLength * 8);
		length = (short) (fixedLength + padding);

		match = new int[matchLength];
		indices = new int[matchLength];
		targets = new InstructionHandle[matchLength];

		for (int i = 0; i < matchLength; i++) {
			match[i] = bytes.readInt();
			indices[i] = bytes.readInt();
		}
	}

}