| /******************************************************************************* |
| * 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 org.eclipse.jdt.internal.core; |
| |
| import org.eclipse.jdt.core.ICompilationUnit; |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.IJavaModelStatusConstants; |
| import org.eclipse.jdt.core.IType; |
| import org.eclipse.jdt.core.JavaModelException; |
| import org.eclipse.jdt.core.dom.ASTNode; |
| import org.eclipse.jdt.core.dom.SimpleName; |
| import org.eclipse.jdt.core.dom.rewrite.ASTRewrite; |
| import org.eclipse.jdt.internal.core.util.Messages; |
| |
| /** |
| * <p>This operation creates a initializer in a type. |
| * |
| * <p>Required Attributes:<ul> |
| * <li>Containing Type |
| * <li>The source code for the initializer. No verification of the source is |
| * performed. |
| * </ul> |
| */ |
| public class CreateInitializerOperation extends CreateTypeMemberOperation { |
| /** |
| * The current number of initializers in the parent type. |
| * Used to retrieve the handle of the newly created initializer. |
| */ |
| protected int numberOfInitializers= 1; |
| /** |
| * When executed, this operation will create an initializer with the given name |
| * in the given type with the specified source. |
| * |
| * <p>By default the new initializer is positioned after the last existing initializer |
| * declaration, or as the first member in the type if there are no |
| * initializers. |
| */ |
| public CreateInitializerOperation(IType parentElement, String source) { |
| super(parentElement, source, false); |
| } |
| protected ASTNode generateElementAST(ASTRewrite rewriter, ICompilationUnit cu) throws JavaModelException { |
| ASTNode node = super.generateElementAST(rewriter, cu); |
| if (node.getNodeType() != ASTNode.INITIALIZER) |
| throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.INVALID_CONTENTS)); |
| return node; |
| } |
| /** |
| * @see CreateElementInCUOperation#generateResultHandle |
| */ |
| protected IJavaElement generateResultHandle() { |
| try { |
| //update the children to be current |
| getType().getCompilationUnit().close(); |
| if (this.anchorElement == null) { |
| return getType().getInitializer(this.numberOfInitializers); |
| } else { |
| IJavaElement[] children = getType().getChildren(); |
| int count = 0; |
| for (int i = 0; i < children.length; i++) { |
| IJavaElement child = children[i]; |
| if (child.equals(this.anchorElement)) { |
| if (child .getElementType() == IJavaElement.INITIALIZER && this.insertionPolicy == CreateElementInCUOperation.INSERT_AFTER) { |
| count++; |
| } |
| return getType().getInitializer(count); |
| } else |
| if (child.getElementType() == IJavaElement.INITIALIZER) { |
| count++; |
| } |
| } |
| } |
| } catch (JavaModelException e) { |
| // type doesn't exist: ignore |
| } |
| return null; |
| } |
| /** |
| * @see CreateElementInCUOperation#getMainTaskName() |
| */ |
| public String getMainTaskName(){ |
| return Messages.operation_createInitializerProgress; |
| } |
| protected SimpleName rename(ASTNode node, SimpleName newName) { |
| return null; // intializer cannot be renamed |
| } |
| /** |
| * By default the new initializer is positioned after the last existing initializer |
| * declaration, or as the first member in the type if there are no |
| * initializers. |
| */ |
| protected void initializeDefaultPosition() { |
| IType parentElement = getType(); |
| try { |
| IJavaElement[] elements = parentElement.getInitializers(); |
| if (elements != null && elements.length > 0) { |
| this.numberOfInitializers = elements.length; |
| createAfter(elements[elements.length - 1]); |
| } else { |
| elements = parentElement.getChildren(); |
| if (elements != null && elements.length > 0) { |
| createBefore(elements[0]); |
| } |
| } |
| } catch (JavaModelException e) { |
| // type doesn't exist: ignore |
| } |
| } |
| } |