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/**********************************************************************
* This file is part of "Object Teams Development Tooling"-Software
*
* Copyright 2006 Fraunhofer Gesellschaft, Munich, Germany,
* for its Fraunhofer Institute for Computer Architecture and Software
* Technology (FIRST), Berlin, Germany and Technical University Berlin,
* Germany.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
* $Id: LiftingType.java 14417 2006-09-23 11:18:42Z stephan $
*
* Please visit http://www.eclipse.org/objectteams for updates and contact.
*
* Contributors:
* Fraunhofer FIRST - Initial API and implementation
* Technical University Berlin - Initial API and implementation
**********************************************************************/
package org.eclipse.jdt.core.dom;
import java.util.ArrayList;
import java.util.List;
/**
* NEW for OTDT
*
* This class represents the anchor "@anchor" of a dependent type T<@anchor>.
* For the compiler this is a value reference but syntactically we treat it
* as a type reference so the whole type can mimic as a regular generic type.
*
* @author stephan
* @version $Id: LiftingType.java 14417 2006-09-23 11:18:42Z stephan $
*/
public class TypeAnchor extends Type {
/**
* The "path" structural property of this node type.
*/
public static final ChildPropertyDescriptor PATH_PROPERTY =
new ChildPropertyDescriptor(TypeAnchor.class, "path", Name.class, MANDATORY, NO_CYCLE_RISK); //$NON-NLS-1$
/**
* A list of property descriptors (element type:
* {@link StructuralPropertyDescriptor}),
* or null if uninitialized.
*/
@SuppressWarnings("rawtypes")
private static final List PROPERTY_DESCRIPTORS;
static
{
List<StructuralPropertyDescriptor> propertyList = new ArrayList<StructuralPropertyDescriptor>(2);
createPropertyList(TypeAnchor.class, propertyList);
addProperty(PATH_PROPERTY, propertyList);
PROPERTY_DESCRIPTORS = reapPropertyList(propertyList);
}
/**
* Returns a list of structural property descriptors for this node type.
* Clients must not modify the result.
*
* @param apiLevel the API level; one of the
* <code>AST.JLS*</code> constants
* @return a list of property descriptors (element type:
* {@link StructuralPropertyDescriptor})
*/
@SuppressWarnings("rawtypes")
public static List propertyDescriptors(int apiLevel)
{
return PROPERTY_DESCRIPTORS;
}
/**
* The path node; lazily initialized; defaults to a unspecified, but legal, path.
*/
private Name path = null;
/**
* Creates a new unparented node for a type anchor owned by the given AST.
* By default, an unspecified, but legal, expression.
* <p>
* N.B. This constructor is package-private.
* </p>
*
* @param ast the AST that is to own this node
*/
TypeAnchor(AST ast)
{
super(ast);
}
@Override
final List internalStructuralPropertiesForType(int apiLevel)
{
return propertyDescriptors(apiLevel);
}
@Override
final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child)
{
if (property == PATH_PROPERTY)
{
if (get)
{
return getPath();
}
else
{
setPath((Name) child);
return null;
}
}
// allow default implementation to flag the error
return super.internalGetSetChildProperty(property, get, child);
}
/**
* Returns the path of this type anchor.
*
* @return the path node
*/
public Name getPath() {
if (this.path == null) {
// lazy init must be thread-safe for readers
synchronized (this) {
if (this.path == null) {
preLazyInit();
this.path = new SimpleName(this.ast);
postLazyInit(this.path, PATH_PROPERTY);
}
}
}
return this.path;
}
/**
* Sets the path of this type anchor.
*
* @param path the new path node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* </ul>
*/
public void setPath(Name path) {
if (path == null) {
throw new IllegalArgumentException();
}
ASTNode oldChild = this.path;
preReplaceChild(oldChild, path, PATH_PROPERTY);
this.path = path;
postReplaceChild(oldChild, path, PATH_PROPERTY);
}
@Override
void accept0(ASTVisitor visitor) {
boolean visitChildren = visitor.visit(this);
if (visitChildren) {
acceptChild(visitor, getPath());
}
visitor.endVisit(this);
}
@Override
ASTNode clone0(AST target) {
TypeAnchor result = new TypeAnchor(target);
result.setSourceRange(this.getStartPosition(), this.getLength());
result.setPath((Name) getPath().clone(target));
return result;
}
@Override
int getNodeType0() {
return TYPE_ANCHOR;
}
@Override
int memSize() {
return BASE_NODE_SIZE + 1 * 4;
}
@Override
boolean subtreeMatch0(ASTMatcher matcher, Object other) {
// dispatch to correct overloaded match method
return matcher.match(this, other);
}
@Override
int treeSize() {
return memSize()
+ (this.path == null ? 0 : getPath().treeSize());
}
}
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