StatementNode.java

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

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

import java.io.PrintWriter;
import java.util.NoSuchElementException;

import edu.udel.cis.vsl.tass.ast.IF.ASTNodeIF;
import edu.udel.cis.vsl.tass.ast.IF.LabelNodeIF;
import edu.udel.cis.vsl.tass.ast.IF.SequenceNodeIF;
import edu.udel.cis.vsl.tass.ast.IF.statement.StatementNodeIF;
import edu.udel.cis.vsl.tass.ast.impl.ASTNode;

public class StatementNode extends ASTNode implements StatementNodeIF {
    
    private SequenceNodeIF<LabelNodeIF> labels = null;

	public StatementNode(long id) {
		super(id);
	}

	@Override
	public SequenceNodeIF<LabelNodeIF> labels() {
		return labels;
	}

	@Override
	public void setLabels(SequenceNodeIF<LabelNodeIF> mLabels) {
		labels = mLabels;
	}

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

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

	@Override
	@SuppressWarnings("unchecked")
	public void setChild(int i, ASTNodeIF child) throws NoSuchElementException {
		switch (i) {
		case 0:
			//FIXME: unchecked cast
			labels = (SequenceNodeIF<LabelNodeIF>) child;
			break;
		default:
			throw new NoSuchElementException("Node " + id()
			   + " does not have a child with index " + i + ".");
		}
	}

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

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

		out.println(prefix+"<stn:statementId>"+id()+"</stn:statementId>");

		if (labels != null) {
			out.println(prefix+"<stn:labels>");
			labels.toXml(prefix+"  ",out,ast);
			out.println(prefix+"</stn:labels>");
		}
	}
}