/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1997-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Steve Yegge
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License Version 2 or later (the "GPL"), in which
* case the provisions of the GPL are applicable instead of those above. If
* you wish to allow use of your version of this file only under the terms of
* the GPL and not to allow others to use your version of this file under the
* MPL, indicate your decision by deleting the provisions above and replacing
* them with the notice and other provisions required by the GPL. If you do
* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the GPL.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.javascript.ast;
import org.mozilla.javascript.Token;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* AST node for a function call. Node type is {@link Token#CALL}.<p>
*/
public class FunctionCall extends AstNode {
protected static final List<AstNode> NO_ARGS =
Collections.unmodifiableList(new ArrayList<AstNode>());
protected AstNode target;
protected List<AstNode> arguments;
protected int lp = -1;
protected int rp = -1;
{
type = Token.CALL;
}
public FunctionCall() {
}
public FunctionCall(int pos) {
super(pos);
}
public FunctionCall(int pos, int len) {
super(pos, len);
}
/**
* Returns node evaluating to the function to call
*/
public AstNode getTarget() {
return target;
}
/**
* Sets node evaluating to the function to call, and sets
* its parent to this node.
* @param target node evaluating to the function to call.
* @throws IllegalArgumentException} if target is {@code null}
*/
public void setTarget(AstNode target) {
assertNotNull(target);
this.target = target;
target.setParent(this);
}
/**
* Returns function argument list
* @return function argument list, or an empty immutable list if
* there are no arguments.
*/
public List<AstNode> getArguments() {
return arguments != null ? arguments : NO_ARGS;
}
/**
* Sets function argument list
* @param arguments function argument list. Can be {@code null},
* in which case any existing args are removed.
*/
public void setArguments(List<AstNode> arguments) {
if (arguments == null) {
this.arguments = null;
} else {
if (this.arguments != null)
this.arguments.clear();
for (AstNode arg : arguments) {
addArgument(arg);
}
}
}
/**
* Adds an argument to the list, and sets its parent to this node.
* @param arg the argument node to add to the list
* @throws IllegalArgumentException} if arg is {@code null}
*/
public void addArgument(AstNode arg) {
assertNotNull(arg);
if (arguments == null) {
arguments = new ArrayList<AstNode>();
}
arguments.add(arg);
arg.setParent(this);
}
/**
* Returns left paren position, -1 if missing
*/
public int getLp() {
return lp;
}
/**
* Sets left paren position
* @param lp left paren position
*/
public void setLp(int lp) {
this.lp = lp;
}
/**
* Returns right paren position, -1 if missing
*/
public int getRp() {
return rp;
}
/**
* Sets right paren position
*/
public void setRp(int rp) {
this.rp = rp;
}
/**
* Sets both paren positions
*/
public void setParens(int lp, int rp) {
this.lp = lp;
this.rp = rp;
}
@Override
public String toSource(int depth) {
StringBuilder sb = new StringBuilder();
sb.append(makeIndent(depth));
sb.append(target.toSource(0));
sb.append("(");
if (arguments != null) {
printList(arguments, sb);
}
sb.append(")");
return sb.toString();
}
/**
* Visits this node, the target object, and the arguments.
*/
@Override
public void visit(NodeVisitor v) {
if (v.visit(this)) {
target.visit(v);
for (AstNode arg : getArguments()) {
arg.visit(v);
}
}
}
}