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/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package jdk.nashorn.internal.ir;
import jdk.nashorn.internal.codegen.types.Type;
import jdk.nashorn.internal.ir.annotations.Immutable;
import jdk.nashorn.internal.ir.visitor.NodeVisitor;
/**
* IR representation of a property access (period operator.)
*/
@Immutable
public final class AccessNode extends BaseNode {
private static final long serialVersionUID = 1L;
/** Property name. */
private final String property;
/**
* Constructor
*
* @param token token
* @param finish finish
* @param base base node
* @param property property
*/
public AccessNode(final long token, final int finish, final Expression base, final String property) {
super(token, finish, base, false);
this.property = property;
}
private AccessNode(final AccessNode accessNode, final Expression base, final String property, final boolean isFunction, final Type type, final int id) {
super(accessNode, base, isFunction, type, id);
this.property = property;
}
/**
* Assist in IR navigation.
* @param visitor IR navigating visitor.
*/
@Override
public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
if (visitor.enterAccessNode(this)) {
return visitor.leaveAccessNode(
setBase((Expression)base.accept(visitor)));
}
return this;
}
@Override
public void toString(final StringBuilder sb, final boolean printType) {
final boolean needsParen = tokenType().needsParens(getBase().tokenType(), true);
if (printType) {
optimisticTypeToString(sb);
}
if (needsParen) {
sb.append('(');
}
base.toString(sb, printType);
if (needsParen) {
sb.append(')');
}
sb.append('.');
sb.append(property);
}
/**
* Get the property name
*
* @return the property name
*/
public String getProperty() {
return property;
}
private AccessNode setBase(final Expression base) {
if (this.base == base) {
return this;
}
return new AccessNode(this, base, property, isFunction(), type, programPoint);
}
@Override
public AccessNode setType(final Type type) {
if (this.type == type) {
return this;
}
return new AccessNode(this, base, property, isFunction(), type, programPoint);
}
@Override
public AccessNode setProgramPoint(final int programPoint) {
if (this.programPoint == programPoint) {
return this;
}
return new AccessNode(this, base, property, isFunction(), type, programPoint);
}
@Override
public AccessNode setIsFunction() {
if (isFunction()) {
return this;
}
return new AccessNode(this, base, property, true, type, programPoint);
}
}
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