/*******************************************************************************
* Copyright (c) 2004, 2013 IBM Corporation and others.
*
* 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
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.core.dom;
import java.util.ArrayList;
import java.util.List;
/**
* AST node for a member reference within a doc comment
* ({@link Javadoc}). The principal uses of these are in "@see" and "@link"
* tag elements, for references to field members (and occasionally to method
* and constructor members).
* <pre>
* MemberRef:
* [ Name ] <b>#</b> Identifier
* </pre>
*
* @see Javadoc
* @since 3.0
* @noinstantiate This class is not intended to be instantiated by clients.
*/
@SuppressWarnings("rawtypes")
public class MemberRef extends ASTNode implements IDocElement {
/**
* The "qualifier" structural property of this node type (child type: {@link Name}).
* @since 3.0
*/
public static final ChildPropertyDescriptor QUALIFIER_PROPERTY =
new ChildPropertyDescriptor(MemberRef.class, "qualifier", Name.class, OPTIONAL, NO_CYCLE_RISK); //$NON-NLS-1$
/**
* The "name" structural property of this node type (child type: {@link SimpleName}).
* @since 3.0
*/
public static final ChildPropertyDescriptor NAME_PROPERTY =
new ChildPropertyDescriptor(MemberRef.class, "name", SimpleName.class, MANDATORY, NO_CYCLE_RISK); //$NON-NLS-1$
/**
* A list of property descriptors (element type:
* {@link StructuralPropertyDescriptor}),
* or null if uninitialized.
*/
private static final List PROPERTY_DESCRIPTORS;
static {
List propertyList = new ArrayList(3);
createPropertyList(MemberRef.class, propertyList);
addProperty(QUALIFIER_PROPERTY, propertyList);
addProperty(NAME_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 AST.JLS* constants
* @return a list of property descriptors (element type:
* {@link StructuralPropertyDescriptor})
* @since 3.0
*/
public static List propertyDescriptors(int apiLevel) {
return PROPERTY_DESCRIPTORS;
}
/**
* The optional qualifier; <code>null</code> for none; defaults to none.
*/
private Name optionalQualifier = null;
/**
* The member name; lazily initialized; defaults to a unspecified,
* legal Java method name.
*/
private SimpleName memberName = null;
/**
* Creates a new AST node for a member reference owned by the given
* AST. By default, the method reference is for a member with an
* unspecified, but legal, name; and no qualifier.
* <p>
* N.B. This constructor is package-private; all subclasses must be
* declared in the same package; clients are unable to declare
* additional subclasses.
* </p>
*
* @param ast the AST that is to own this node
*/
MemberRef(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 == QUALIFIER_PROPERTY) {
if (get) {
return getQualifier();
} else {
setQualifier((Name) child);
return null;
}
}
if (property == NAME_PROPERTY) {
if (get) {
return getName();
} else {
setName((SimpleName) child);
return null;
}
}
// allow default implementation to flag the error
return super.internalGetSetChildProperty(property, get, child);
}
@Override
final int getNodeType0() {
return MEMBER_REF;
}
@Override
ASTNode clone0(AST target) {
MemberRef result = new MemberRef(target);
result.setSourceRange(getStartPosition(), getLength());
result.setQualifier((Name) ASTNode.copySubtree(target, getQualifier()));
result.setName((SimpleName) ASTNode.copySubtree(target, getName()));
return result;
}
@Override
final boolean subtreeMatch0(ASTMatcher matcher, Object other) {
// dispatch to correct overloaded match method
return matcher.match(this, other);
}
@Override
void accept0(ASTVisitor visitor) {
boolean visitChildren = visitor.visit(this);
if (visitChildren) {
// visit children in normal left to right reading order
acceptChild(visitor, getQualifier());
acceptChild(visitor, getName());
}
visitor.endVisit(this);
}
/**
* Returns the qualifier of this member reference, or
* <code>null</code> if there is none.
*
* @return the qualifier name node, or <code>null</code> if there is none
*/
public Name getQualifier() {
return this.optionalQualifier;
}
/**
* Sets or clears the qualifier of this member reference.
*
* @param name the qualifier name node, or <code>null</code> if
* there is none
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* </ul>
*/
public void setQualifier(Name name) {
ASTNode oldChild = this.optionalQualifier;
preReplaceChild(oldChild, name, QUALIFIER_PROPERTY);
this.optionalQualifier = name;
postReplaceChild(oldChild, name, QUALIFIER_PROPERTY);
}
/**
* Returns the name of the referenced member.
*
* @return the member name node
*/
public SimpleName getName() {
if (this.memberName == null) {
// lazy init must be thread-safe for readers
synchronized (this) {
if (this.memberName == null) {
preLazyInit();
this.memberName = new SimpleName(this.ast);
postLazyInit(this.memberName, NAME_PROPERTY);
}
}
}
return this.memberName;
}
/**
* Sets the name of the referenced member to the given name.
*
* @param name the new member name node
* @exception IllegalArgumentException if:
* <ul>
* <li>the name is <code>null</code></li>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* </ul>
*/
public void setName(SimpleName name) {
if (name == null) {
throw new IllegalArgumentException();
}
ASTNode oldChild = this.memberName;
preReplaceChild(oldChild, name, NAME_PROPERTY);
this.memberName = name;
postReplaceChild(oldChild, name, NAME_PROPERTY);
}
/**
* Resolves and returns the binding for the entity referred to by
* this member reference.
* <p>
* Note that bindings are generally unavailable unless requested when the
* AST is being built.
* </p>
*
* @return the binding, or <code>null</code> if the binding cannot be
* resolved
*/
public final IBinding resolveBinding() {
return this.ast.getBindingResolver().resolveReference(this);
}
@Override
int memSize() {
return BASE_NODE_SIZE + 2 * 4;
}
@Override
int treeSize() {
return
memSize()
+ (this.optionalQualifier == null ? 0 : getQualifier().treeSize())
+ (this.memberName == null ? 0 : getName().treeSize());
}
}
