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Groovy: A powerful, dynamic language for the JVM
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.*;
import org.codehaus.groovy.ast.GroovyCodeVisitor;
/**
* Represents a tuple expression {1, 2, 3} which creates an immutable List
*
* @author James Strachan
*/
public class TupleExpression extends Expression implements Iterable {
private List 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(length);
}
public TupleExpression(List 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 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);
ret.copyNodeMetaData(this);
return ret;
}
public Expression getExpression(int i) {
return expressions.get(i);
}
public String getText() {
StringBuilder buffer = new StringBuilder("(");
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;
}
public Iterator iterator() {
return Collections.unmodifiableList(expressions).iterator();
}
}