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/*
 * Copyright 2003-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.codehaus.groovy.ast.stmt;

import java.util.ArrayList;
import java.util.List;

import org.codehaus.groovy.ast.GroovyCodeVisitor;
import org.codehaus.groovy.ast.expr.Expression;

/**
 * Represents a switch (object) { case value: ... case [1, 2, 3]: ...  default: ... } statement in Groovy.
 * 
 * @author James Strachan
 * @version $Revision$
 */
public class SwitchStatement extends Statement {

    private Expression expression;
    private List caseStatements = new ArrayList();
    private Statement defaultStatement;
    

    public SwitchStatement(Expression expression) {
        this(expression, EmptyStatement.INSTANCE);
    }

    public SwitchStatement(Expression expression, Statement defaultStatement) {
        this.expression = expression;
        this.defaultStatement = defaultStatement;
    }

    public SwitchStatement(Expression expression, List caseStatements, Statement defaultStatement) {
        this.expression = expression;
        this.caseStatements = caseStatements;
        this.defaultStatement = defaultStatement;
    }

    public void visit(GroovyCodeVisitor visitor) {
        visitor.visitSwitch(this);
    }
    
    public List getCaseStatements() {
        return caseStatements;
    }

    public Expression getExpression() {
        return expression;
    }

    public void setExpression(Expression e) {
        expression=e;
    }
    
    public Statement getDefaultStatement() {
        return defaultStatement;
    }

    public void setDefaultStatement(Statement defaultStatement) {
        this.defaultStatement = defaultStatement;
    }

    public void addCase(CaseStatement caseStatement) {
        caseStatements.add(caseStatement);
    }

    /**
     * @return the case statement of the given index or null
     */
    public CaseStatement getCaseStatement(int idx) {
        if (idx >= 0 && idx < caseStatements.size()) {
            return caseStatements.get(idx);
        }
        return null;
    }
}