/******************************************************************************* * Copyright (c) 2000, 2008 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 net.sourceforge.phpdt.core.dom; import java.util.ArrayList; import java.util.List; /** * Catch clause AST node type. * *
* CatchClause: * catch ( FormalParameter ) Block ** * @since 2.0 * @noinstantiate This class is not intended to be instantiated by clients. */ public class CatchClause extends ASTNode { /** * The "exception" structural property of this node type. * @since 3.0 */ public static final ChildPropertyDescriptor EXCEPTION_PROPERTY = new ChildPropertyDescriptor(CatchClause.class, "exception", SingleVariableDeclaration.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$ /** * The "body" structural property of this node type. * @since 3.0 */ public static final ChildPropertyDescriptor BODY_PROPERTY = new ChildPropertyDescriptor(CatchClause.class, "body", Block.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(CatchClause.class, properyList); addProperty(EXCEPTION_PROPERTY, properyList); addProperty(BODY_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 *
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 body; lazily initialized; defaults to an empty block.
*/
private Block body = null;
/**
* The exception variable declaration; lazily initialized; defaults to a
* unspecified, but legal, variable declaration.
*/
private SingleVariableDeclaration exceptionDecl = null;
/**
* Creates a new AST node for a catch clause owned by the given
* AST. By default, the catch clause declares an unspecified, but legal,
* exception declaration and has an empty block.
* * N.B. This constructor is package-private. *
* * @param ast the AST that is to own this node */ CatchClause(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 == EXCEPTION_PROPERTY) { if (get) { return getException(); } else { setException((SingleVariableDeclaration) child); return null; } } if (property == BODY_PROPERTY) { if (get) { return getBody(); } else { setBody((Block) 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 CATCH_CLAUSE; } /* (omit javadoc for this method) * Method declared on ASTNode. */ ASTNode clone0(AST target) { CatchClause result = new CatchClause(target); result.setSourceRange(this.getStartPosition(), this.getLength()); result.setBody((Block) getBody().clone(target)); result.setException( (SingleVariableDeclaration) ASTNode.copySubtree(target, getException())); 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, getException()); acceptChild(visitor, getBody()); } visitor.endVisit(this); } /** * Returns the exception variable declaration of this catch clause. * * @return the exception variable declaration node */ public SingleVariableDeclaration getException() { if (this.exceptionDecl == null) { // lazy init must be thread-safe for readers synchronized (this) { if (this.exceptionDecl == null) { preLazyInit(); this.exceptionDecl = new SingleVariableDeclaration(this.ast); postLazyInit(this.exceptionDecl, EXCEPTION_PROPERTY); } } } return this.exceptionDecl; } /** * Sets the variable declaration of this catch clause. * * @param exception the exception variable declaration node * @exception IllegalArgumentException if: *