| /******************************************************************************* |
| * Copyright (c) 2000, 2013 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.aspectj.org.eclipse.jdt.core.dom; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Array access expression AST node type. |
| * |
| * <pre> |
| * ArrayAccess: |
| * Expression <b>[</b> Expression <b>]</b> |
| * </pre> |
| * |
| * @since 2.0 |
| * @noinstantiate This class is not intended to be instantiated by clients. |
| */ |
| @SuppressWarnings("rawtypes") |
| public class ArrayAccess extends Expression { |
| |
| /** |
| * The "array" structural property of this node type (child type: {@link Expression}). |
| * @since 3.0 |
| */ |
| public static final ChildPropertyDescriptor ARRAY_PROPERTY = |
| new ChildPropertyDescriptor(ArrayAccess.class, "array", Expression.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$ |
| |
| /** |
| * The "index" structural property of this node type (child type: {@link Expression}). |
| * @since 3.0 |
| */ |
| public static final ChildPropertyDescriptor INDEX_PROPERTY = |
| new ChildPropertyDescriptor(ArrayAccess.class, "index", 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 properyList = new ArrayList(3); |
| createPropertyList(ArrayAccess.class, properyList); |
| addProperty(ARRAY_PROPERTY, properyList); |
| addProperty(INDEX_PROPERTY, properyList); |
| PROPERTY_DESCRIPTORS = 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}) |
| * @since 3.0 |
| */ |
| public static List propertyDescriptors(int apiLevel) { |
| return PROPERTY_DESCRIPTORS; |
| } |
| |
| /** |
| * The array expression; lazily initialized; defaults to an unspecified, |
| * but legal, expression. |
| */ |
| private Expression arrayExpression = null; |
| |
| /** |
| * The index expression; lazily initialized; defaults to an unspecified, |
| * but legal, expression. |
| */ |
| private Expression indexExpression = null; |
| |
| /** |
| * Creates a new unparented array access expression node owned by the given |
| * AST. By default, the array and index expresssions are unspecified, |
| * but legal. |
| * <p> |
| * N.B. This constructor is package-private. |
| * </p> |
| * |
| * @param ast the AST that is to own this node |
| */ |
| ArrayAccess(AST ast) { |
| super(ast); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final List internalStructuralPropertiesForType(int apiLevel) { |
| return propertyDescriptors(apiLevel); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) { |
| if (property == ARRAY_PROPERTY) { |
| if (get) { |
| return getArray(); |
| } else { |
| setArray((Expression) child); |
| return null; |
| } |
| } |
| if (property == INDEX_PROPERTY) { |
| if (get) { |
| return getIndex(); |
| } else { |
| setIndex((Expression) child); |
| return null; |
| } |
| } |
| // allow default implementation to flag the error |
| return super.internalGetSetChildProperty(property, get, child); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final int getNodeType0() { |
| return ARRAY_ACCESS; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| ASTNode clone0(AST target) { |
| ArrayAccess result = new ArrayAccess(target); |
| result.setSourceRange(getStartPosition(), getLength()); |
| result.setArray((Expression) getArray().clone(target)); |
| result.setIndex((Expression) getIndex().clone(target)); |
| return result; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final boolean subtreeMatch0(ASTMatcher matcher, Object other) { |
| // dispatch to correct overloaded match method |
| return matcher.match(this, other); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| void accept0(ASTVisitor visitor) { |
| boolean visitChildren = visitor.visit(this); |
| if (visitChildren) { |
| // visit children in normal left to right reading order |
| acceptChild(visitor, getArray()); |
| acceptChild(visitor, getIndex()); |
| } |
| visitor.endVisit(this); |
| } |
| |
| /** |
| * Returns the array expression of this array access expression. |
| * |
| * @return the array expression node |
| */ |
| public Expression getArray() { |
| if (this.arrayExpression == null) { |
| // lazy init must be thread-safe for readers |
| synchronized (this) { |
| if (this.arrayExpression == null) { |
| preLazyInit(); |
| this.arrayExpression = new SimpleName(this.ast); |
| postLazyInit(this.arrayExpression, ARRAY_PROPERTY); |
| } |
| } |
| } |
| return this.arrayExpression; |
| } |
| |
| /** |
| * Sets the array expression of this array access expression. |
| * |
| * @param expression the array expression 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 setArray(Expression expression) { |
| if (expression == null) { |
| throw new IllegalArgumentException(); |
| } |
| // an ArrayAccess may occur inside an Expression |
| // must check cycles |
| ASTNode oldChild = this.arrayExpression; |
| preReplaceChild(oldChild, expression, ARRAY_PROPERTY); |
| this.arrayExpression = expression; |
| postReplaceChild(oldChild, expression, ARRAY_PROPERTY); |
| } |
| |
| /** |
| * Returns the index expression of this array access expression. |
| * |
| * @return the index expression node |
| */ |
| public Expression getIndex() { |
| if (this.indexExpression == null) { |
| // lazy init must be thread-safe for readers |
| synchronized (this) { |
| if (this.indexExpression == null) { |
| preLazyInit(); |
| this.indexExpression = new SimpleName(this.ast); |
| postLazyInit(this.indexExpression, INDEX_PROPERTY); |
| } |
| } |
| } |
| return this.indexExpression; |
| } |
| |
| /** |
| * Sets the index expression of this array access expression. |
| * |
| * @param expression the index expression 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 setIndex(Expression expression) { |
| if (expression == null) { |
| throw new IllegalArgumentException(); |
| } |
| // an ArrayAccess may occur inside an Expression |
| // must check cycles |
| ASTNode oldChild = this.indexExpression; |
| preReplaceChild(oldChild, expression, INDEX_PROPERTY); |
| this.indexExpression = expression; |
| postReplaceChild(oldChild, expression, INDEX_PROPERTY); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int memSize() { |
| return BASE_NODE_SIZE + 2 * 4; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int treeSize() { |
| return |
| memSize() |
| + (this.arrayExpression == null ? 0 : getArray().treeSize()) |
| + (this.indexExpression == null ? 0 : getIndex().treeSize()); |
| } |
| } |
| |