LabelNode.java

package edu.udel.cis.vsl.tass.ast.impl;

import edu.udel.cis.vsl.tass.ast.IF.AbstractSyntaxTreeIF;

import edu.udel.cis.vsl.tass.ast.IF.LabelNodeIF;
import edu.udel.cis.vsl.tass.ast.IF.ASTNodeIF;
import edu.udel.cis.vsl.tass.ast.IF.IdentifierNodeIF;
import edu.udel.cis.vsl.tass.ast.IF.statement.StatementNodeIF;

import java.util.NoSuchElementException;

import java.io.PrintWriter;

public class LabelNode
	extends ASTNode
	implements LabelNodeIF {

	private IdentifierNodeIF identifier;

	private StatementNodeIF statement;

	public LabelNode(long id) {
		super(id);
	}
	
	public LabelNode(long id,
					 IdentifierNodeIF mIdentifier,
					 StatementNodeIF mStatement) {
		super(id);
		identifier = mIdentifier;
		statement = mStatement;
	}

	@Override
	public IdentifierNodeIF identifier() {
		return identifier;
	}

	@Override
	public StatementNodeIF statement() {
		return statement;
	}

	@Override
	public void setIdentifier(IdentifierNodeIF mIdentifier) {
		identifier = mIdentifier;
	}

	@Override
	public void setStatement(StatementNodeIF mStatement) {
		statement = mStatement;
	}

	@Override
	public int numChildren() {
		return 1;
	}

	@Override
	public ASTNodeIF child(int index) throws NoSuchElementException {
		switch (index) {
		case 0:
			return identifier;
		default:
			throw new NoSuchElementException("Node " + id()
					+ " does not have a child with index " + index + ".");
		}
	}

	@Override
	public void setChild(int i, ASTNodeIF child) throws NoSuchElementException {
		switch (i) {
		case 0:
			identifier = (IdentifierNodeIF) child;
			break;
		default:
			throw new NoSuchElementException("Node " + id()
					+ " does not have a child with index " + i + ".");
		}
	}

	@Override
	protected String nodeType() {
		return "Label";
	}

	@Override
	public void toXml(String prefix, PrintWriter out,AbstractSyntaxTreeIF ast) {
		super.toXml(prefix,out,ast);

		out.println(prefix+"<ln:identifier>");
		identifier.toXml(prefix+"  ",out,ast);
		out.println(prefix+"</ln:identifier>");

		out.println(prefix+"<ln:statementRef>"+statement.id()+"</ln:statementRef>");
	}
}