/******************************************************************************* * 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; /** * Try statement AST node type. * *
* TryStatement: * try Block * { CatchClause } * [ finally Block ] ** * @since 2.0 * @noinstantiate This class is not intended to be instantiated by clients. */ public class TryStatement extends Statement { /** * The "body" structural property of this node type. * @since 3.0 */ public static final ChildPropertyDescriptor BODY_PROPERTY = new ChildPropertyDescriptor(TryStatement.class, "body", Block.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$ /** * The "catchClauses" structural property of this node type. * @since 3.0 */ public static final ChildListPropertyDescriptor CATCH_CLAUSES_PROPERTY = new ChildListPropertyDescriptor(TryStatement.class, "catchClauses", CatchClause.class, CYCLE_RISK); //$NON-NLS-1$ /** * The "finally" structural property of this node type. * @since 3.0 */ public static final ChildPropertyDescriptor FINALLY_PROPERTY = new ChildPropertyDescriptor(TryStatement.class, "finally", Block.class, OPTIONAL, 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(4); createPropertyList(TryStatement.class, propertyList); addProperty(BODY_PROPERTY, propertyList); addProperty(CATCH_CLAUSES_PROPERTY, propertyList); addProperty(FINALLY_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})
* @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 catch clauses (element type: CatchClause
).
* Defaults to an empty list.
*/
private ASTNode.NodeList catchClauses =
new ASTNode.NodeList(CATCH_CLAUSES_PROPERTY);
/**
* The finally block, or null
if none.
* Defaults to none.
*/
private Block optionalFinallyBody = null;
/**
* Creates a new AST node for a try statement owned by the given
* AST. By default, the try statement has an empty block, no catch
* clauses, and no finally block.
* * N.B. This constructor is package-private. *
* * @param ast the AST that is to own this node */ TryStatement(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 == BODY_PROPERTY) { if (get) { return getBody(); } else { setBody((Block) child); return null; } } if (property == FINALLY_PROPERTY) { if (get) { return getFinally(); } else { setFinally((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 List internalGetChildListProperty(ChildListPropertyDescriptor property) { if (property == CATCH_CLAUSES_PROPERTY) { return catchClauses(); } // allow default implementation to flag the error return super.internalGetChildListProperty(property); } /* (omit javadoc for this method) * Method declared on ASTNode. */ final int getNodeType0() { return TRY_STATEMENT; } /* (omit javadoc for this method) * Method declared on ASTNode. */ ASTNode clone0(AST target) { TryStatement result = new TryStatement(target); result.setSourceRange(this.getStartPosition(), this.getLength()); result.copyLeadingComment(this); result.setBody((Block) getBody().clone(target)); result.catchClauses().addAll( ASTNode.copySubtrees(target, catchClauses())); result.setFinally( (Block) ASTNode.copySubtree(target, getFinally())); 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, getBody()); acceptChildren(visitor, this.catchClauses); acceptChild(visitor, getFinally()); } visitor.endVisit(this); } /** * Returns the body of this try statement. * * @return the try body */ public Block getBody() { if (this.body == null) { // lazy init must be thread-safe for readers synchronized (this) { if (this.body == null) { preLazyInit(); this.body = new Block(this.ast); postLazyInit(this.body, BODY_PROPERTY); } } } return this.body; } /** * Sets the body of this try statement. * * @param body the block node * @exception IllegalArgumentException if: *CatchClause
)
*/
public List catchClauses() {
return this.catchClauses;
}
/**
* Returns the finally block of this try statement, or null
if
* this try statement has no finally block.
*
* @return the finally block, or null
if this try statement
* has none
*/
public Block getFinally() {
return this.optionalFinallyBody;
}
/**
* Sets or clears the finally block of this try statement.
*
* @param block the finally block node, or null
if
* there is none
* @exception IllegalArgumentException if:
*