Groovy example source code file (TupleExpression.java)

This example Groovy source code file (TupleExpression.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

arraylist, expression, expression, list, string, string, stringbuffer, stringbuffer, tupleexpression, tupleexpression, util

The Groovy TupleExpression.java source code

/*
 * 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.expr;

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

import org.codehaus.groovy.ast.GroovyCodeVisitor;

/**
 * Represents a tuple expression {1, 2, 3} which creates an immutable List
 * 
 * @author <a href="mailto:james@coredevelopers.net">James Strachan
 * @version $Revision: 15807 $
 */
public class TupleExpression extends Expression {
    private List<Expression> expressions;

    public TupleExpression() {
        this(0);
    }

    public TupleExpression(Expression expr) {
        this(1);
        addExpression(expr);
    }

    public TupleExpression(Expression expr1, Expression expr2) {
        this(2);
        addExpression(expr1);
        addExpression(expr2);
    }

    public TupleExpression(Expression expr1, Expression expr2, Expression expr3) {
        this(3);
        addExpression(expr1);
        addExpression(expr2);
        addExpression(expr3);
    }
    
    public TupleExpression(int length) {
        this.expressions = new ArrayList<Expression>(length);
    }
    
    public TupleExpression(List<Expression> expressions) {
        this.expressions = expressions;
    }
    
    public TupleExpression(Expression[] expressionArray) {
        this();
        expressions.addAll(Arrays.asList(expressionArray));
    }

    public TupleExpression addExpression(Expression expression) {
        expressions.add(expression);
        return this;
    }
    
    public List<Expression> getExpressions() {
        return expressions;
    }

    public void visit(GroovyCodeVisitor visitor) {
        visitor.visitTupleExpression(this);
    }

    public Expression transformExpression(ExpressionTransformer transformer) {
        Expression ret = new TupleExpression(transformExpressions(getExpressions(), transformer)); 
        ret.setSourcePosition(this);
        return ret;
    }

    public Expression getExpression(int i) {
        return expressions.get(i);
    }

    public String getText() {
        StringBuffer buffer = new StringBuffer("(");
        boolean first = true;
        for (Expression expression : expressions) {
            if (first) {
                first = false;
            }
            else {
                buffer.append(", ");
            }
            
            buffer.append(expression.getText());
        }
        buffer.append(")");
        return buffer.toString();
    }

    public String toString() {
        return super.toString() + expressions;
    }
}