| /******************************************************************************* |
| * 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). |
| * <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: {@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: |
| * {@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. |
| * |
| * @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. |
| */ |
| 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. |
| * <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. |
| * |
| * @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. |
| * |
| * @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()); |
| } |
| |
| } |