Copyright (c) 2016, 2017 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
IBM Corporation - initial API and implementation
/*******************************************************************************
* Copyright (c) 2016, 2017 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
*
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.core.dom;
import java.util.ArrayList;
import java.util.List;
Uses directive AST node type (added in JLS9 API).
UsesDirective:
uses Name ;
Since: 3.14 @noextend This class is not intended to be subclassed by clients. @noinstantiate This class is not intended to be instantiated by clients.
/**
* Uses directive AST node type (added in JLS9 API).
* <pre>
* UsesDirective:
* <b>uses</b> Name <b>;</b>
* </pre>
*
* @since 3.14
*
* @noextend This class is not intended to be subclassed by clients.
* @noinstantiate This class is not intended to be instantiated by clients.
*/
@SuppressWarnings("rawtypes")
public class UsesDirective extends ModuleDirective {
The "name" structural property of this node type (child type: Name
). /**
* The "name" structural property of this node type (child type: {@link Name}).
*/
public static final ChildPropertyDescriptor NAME_PROPERTY =
new ChildPropertyDescriptor(UsesDirective.class, "name", Name.class, MANDATORY, NO_CYCLE_RISK); //$NON-NLS-1$
A list of property descriptors (element type: StructuralPropertyDescriptor
), or null if uninitialized. /**
* A list of property descriptors (element type:
* {@link StructuralPropertyDescriptor}),
* or null if uninitialized.
*/
private static final List PROPERTY_DESCRIPTORS_9_0;
static {
List properyList = new ArrayList(2);
createPropertyList(UsesDirective.class, properyList);
addProperty(NAME_PROPERTY, properyList);
PROPERTY_DESCRIPTORS_9_0 = reapPropertyList(properyList);
}
Returns a list of structural property descriptors for this node type.
Clients must not modify the result.
Params: - apiLevel – the API level; one of the
AST.JLS*
constants
Returns: a list of property descriptors (element type: StructuralPropertyDescriptor
)
/**
* 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})
*/
public static List propertyDescriptors(int apiLevel) {
return PROPERTY_DESCRIPTORS_9_0;
}
The module name; lazily initialized; defaults to a unspecified,
legal Java identifier.
/**
* The module name; lazily initialized; defaults to a unspecified,
* legal Java identifier.
*/
private Name name = null;
Creates a new AST node for an uses directive owned by the
given AST. The uses directive initially is
for an unspecified, but legal, Java type name.
N.B. This constructor is package-private; all subclasses must be
declared in the same package; clients are unable to declare
additional subclasses.
Params: - ast – the AST that is to own this node
/**
* Creates a new AST node for an uses directive owned by the
* given AST. The uses directive initially is
* for an unspecified, but legal, Java type name.
* <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
*/
UsesDirective(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 == NAME_PROPERTY) {
if (get) {
return getName();
} else {
setName((Name) child);
return null;
}
}
// allow default implementation to flag the error
return super.internalGetSetChildProperty(property, get, child);
}
@Override
final int getNodeType0() {
return USES_DIRECTIVE;
}
@Override
ASTNode clone0(AST target) {
UsesDirective result = new UsesDirective(target);
result.setSourceRange(getStartPosition(), getLength());
result.setName((Name) getName().clone(target));
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) {
acceptChild(visitor, getName());
}
visitor.endVisit(this);
}
Returns the name of the service in this directive.
Returns: the name of the service
/**
* Returns the name of the service in this directive.
*
* @return the name of the service
*/
public Name getName() {
if (this.name == null) {
// lazy init must be thread-safe for readers
synchronized (this) {
if (this.name == null) {
preLazyInit();
this.name = this.ast.newQualifiedName(
new SimpleName(this.ast), new SimpleName(this.ast));
postLazyInit(this.name, NAME_PROPERTY);
}
}
}
return this.name;
}
Sets the name of the service in this directive.
Params: - name – the new name of the service
Throws: - IllegalArgumentException – if:
- the node belongs to a different AST
- the node already has a parent
/**
* Sets the name of the service in this directive.
*
* @param name the new name of the service
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* </ul>
*/
public void setName(Name name) {
if (name == null) {
throw new IllegalArgumentException();
}
ASTNode oldChild = this.name;
preReplaceChild(oldChild, name, NAME_PROPERTY);
this.name = name;
postReplaceChild(oldChild, name, NAME_PROPERTY);
}
@Override
int memSize() {
return BASE_NODE_SIZE + 1 * 4;
}
@Override
int treeSize() {
return
memSize()
+ (this.name == null ? 0 : getName().treeSize());
}
}