| /******************************************************************************* |
| * Copyright (c) 2004, 2019 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; |
| |
| /** |
| * Member value pair node (added in JLS3 API). Member value pairs appear in annotations. |
| * <pre> |
| * MemberValuePair: |
| * SimpleName <b>=</b> Expression |
| * </pre> |
| * <p> |
| * Within annotations, only certain kinds of expressions are meaningful, |
| * including other annotations. |
| * </p> |
| * |
| * @see NormalAnnotation |
| * @since 3.1 |
| * @noinstantiate This class is not intended to be instantiated by clients. |
| */ |
| @SuppressWarnings("rawtypes") |
| public class MemberValuePair extends ASTNode { |
| |
| /** |
| * The "name" structural property of this node type (child type: {@link SimpleName}). |
| */ |
| public static final ChildPropertyDescriptor NAME_PROPERTY = |
| new ChildPropertyDescriptor(MemberValuePair.class, "name", SimpleName.class, MANDATORY, NO_CYCLE_RISK); //$NON-NLS-1$ |
| |
| /** |
| * The "value" structural property of this node type (child type: {@link Expression}). |
| */ |
| public static final ChildPropertyDescriptor VALUE_PROPERTY = |
| new ChildPropertyDescriptor(MemberValuePair.class, "value", Expression.class, MANDATORY, 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(MemberValuePair.class, propertyList); |
| addProperty(NAME_PROPERTY, propertyList); |
| addProperty(VALUE_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}) |
| */ |
| public static List propertyDescriptors(int apiLevel) { |
| return PROPERTY_DESCRIPTORS; |
| } |
| |
| /** |
| * The member name; lazily initialized; defaults to a unspecified, |
| * legal name. |
| */ |
| private SimpleName name = null; |
| |
| /** |
| * The value; lazily initialized; defaults to a unspecified, |
| * legal expression. |
| */ |
| private Expression value = null; |
| |
| /** |
| * Creates a new AST node for a member value pair owned by the given |
| * AST. By default, the node has an unspecified (but legal) member |
| * name and value. |
| * <p> |
| * N.B. This constructor is package-private. |
| * </p> |
| * |
| * @param ast the AST that is to own this node |
| */ |
| MemberValuePair(AST ast) { |
| super(ast); |
| unsupportedIn2(); |
| } |
| |
| @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((SimpleName) child); |
| return null; |
| } |
| } |
| if (property == VALUE_PROPERTY) { |
| if (get) { |
| return getValue(); |
| } else { |
| setValue((Expression) child); |
| return null; |
| } |
| } |
| // allow default implementation to flag the error |
| return super.internalGetSetChildProperty(property, get, child); |
| } |
| |
| @Override |
| final int getNodeType0() { |
| return MEMBER_VALUE_PAIR; |
| } |
| |
| @Override |
| ASTNode clone0(AST target) { |
| MemberValuePair result = new MemberValuePair(target); |
| result.setSourceRange(getStartPosition(), getLength()); |
| result.setName((SimpleName) ASTNode.copySubtree(target, getName())); |
| result.setValue((Expression) ASTNode.copySubtree(target, getValue())); |
| 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, getName()); |
| acceptChild(visitor, getValue()); |
| } |
| visitor.endVisit(this); |
| } |
| |
| /** |
| * Returns the member name. |
| * |
| * @return the member name node |
| */ |
| public SimpleName getName() { |
| if (this.name == null) { |
| // lazy init must be thread-safe for readers |
| synchronized (this) { |
| if (this.name == null) { |
| preLazyInit(); |
| this.name = new SimpleName(this.ast); |
| postLazyInit(this.name, NAME_PROPERTY); |
| } |
| } |
| } |
| return this.name; |
| } |
| |
| /** |
| * Resolves and returns the member value pair binding for this member value pair. |
| * <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 |
| * @since 3.2 |
| */ |
| public final IMemberValuePairBinding resolveMemberValuePairBinding() { |
| return this.ast.getBindingResolver().resolveMemberValuePair(this); |
| } |
| |
| /** |
| * Sets the member name. |
| * |
| * @param name the member name node |
| * @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(SimpleName name) { |
| if (name == null) { |
| throw new IllegalArgumentException(); |
| } |
| ASTNode oldChild = this.name; |
| preReplaceChild(oldChild, name, NAME_PROPERTY); |
| this.name = name; |
| postReplaceChild(oldChild, name, NAME_PROPERTY); |
| } |
| |
| /** |
| * Returns the value expression. |
| * |
| * @return the value expression |
| */ |
| public Expression getValue() { |
| if (this.value == null) { |
| // lazy init must be thread-safe for readers |
| synchronized (this) { |
| if (this.value == null) { |
| preLazyInit(); |
| this.value= new SimpleName(this.ast); |
| postLazyInit(this.value, VALUE_PROPERTY); |
| } |
| } |
| } |
| return this.value; |
| } |
| |
| /** |
| * Sets the value of this pair. |
| * |
| * @param value the new value |
| * @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 setValue(Expression value) { |
| if (value == null) { |
| throw new IllegalArgumentException(); |
| } |
| ASTNode oldChild = this.value; |
| preReplaceChild(oldChild, value, VALUE_PROPERTY); |
| this.value = value; |
| postReplaceChild(oldChild, value, VALUE_PROPERTY); |
| } |
| |
| @Override |
| int memSize() { |
| return BASE_NODE_SIZE + 2 * 4; |
| } |
| |
| @Override |
| int treeSize() { |
| return |
| memSize() |
| + (this.name == null ? 0 : getName().treeSize()) |
| + (this.value == null ? 0 : getValue().treeSize()); |
| } |
| } |