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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.
/**
* IR representation of an object literal.
*/
@Immutable
public final class ObjectNode extends Expression implements LexicalContextNode, Splittable {
private static final long serialVersionUID = 1L;
Literal elements. /** Literal elements. */
private final List<PropertyNode> elements;
Ranges for splitting large literals over multiple compile units in codegen. /** Ranges for splitting large literals over multiple compile units in codegen. */
private final List<Splittable.SplitRange> splitRanges;
Constructor
Params: - token – token
- finish – finish
- elements – the elements used to initialize this ObjectNode
/**
* 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
Returns: a list of elements
/**
* 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
Params: - lc – the lexical context
- splitRanges – list of split ranges
See Also: - SplitRange
Returns: new or changed object node
/**
* 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 Also: - SplitRange
Returns: list of split ranges
/**
* 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);
}
}