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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 java.util.Collections;
import java.util.List;
import java.util.RandomAccess;
import jdk.nashorn.internal.codegen.types.Type;
import jdk.nashorn.internal.ir.annotations.Immutable;
import jdk.nashorn.internal.ir.visitor.NodeVisitor;
/**
* IR representation of an object literal.
*/
@Immutable
public final class ObjectNode extends Expression implements LexicalContextNode, Splittable {
private static final long serialVersionUID = 1L;
/** Literal elements. */
private final List<PropertyNode> elements;
/** Ranges for splitting large literals over multiple compile units in codegen. */
private final List<Splittable.SplitRange> splitRanges;
/**
* Constructor
*
* @param token token
* @param finish finish
* @param elements the elements used to initialize this ObjectNode
*/
public ObjectNode(final long token, final int finish, final List<PropertyNode> elements) {
super(token, finish);
this.elements = elements;
this.splitRanges = null;
assert elements instanceof RandomAccess : "Splitting requires random access lists";
}
private ObjectNode(final ObjectNode objectNode, final List<PropertyNode> elements,
final List<Splittable.SplitRange> splitRanges ) {
super(objectNode);
this.elements = elements;
this.splitRanges = splitRanges;
}
@Override
public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
return Acceptor.accept(this, visitor);
}
@Override
public Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) {
if (visitor.enterObjectNode(this)) {
return visitor.leaveObjectNode(setElements(lc, Node.accept(visitor, elements)));
}
return this;
}
@Override
public Type getType() {
return Type.OBJECT;
}
@Override
public void toString(final StringBuilder sb, final boolean printType) {
sb.append('{');
if (!elements.isEmpty()) {
sb.append(' ');
boolean first = true;
for (final Node element : elements) {
if (!first) {
sb.append(", ");
}
first = false;
element.toString(sb, printType);
}
sb.append(' ');
}
sb.append('}');
}
/**
* Get the elements of this literal node
* @return a list of elements
*/
public List<PropertyNode> getElements() {
return Collections.unmodifiableList(elements);
}
private ObjectNode setElements(final LexicalContext lc, final List<PropertyNode> elements) {
if (this.elements == elements) {
return this;
}
return Node.replaceInLexicalContext(lc, this, new ObjectNode(this, elements, this.splitRanges));
}
/**
* Set the split ranges for this ObjectNode
* @see Splittable.SplitRange
* @param lc the lexical context
* @param splitRanges list of split ranges
* @return new or changed object node
*/
public ObjectNode setSplitRanges(final LexicalContext lc, final List<Splittable.SplitRange> splitRanges) {
if (this.splitRanges == splitRanges) {
return this;
}
return Node.replaceInLexicalContext(lc, this, new ObjectNode(this, elements, splitRanges));
}
/**
* Get the split ranges for this ObjectNode, or null if the object is not split.
* @see Splittable.SplitRange
* @return list of split ranges
*/
@Override
public List<Splittable.SplitRange> getSplitRanges() {
return splitRanges == null ? null : Collections.unmodifiableList(splitRanges);
}
}
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