/*******************************************************************************
* 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.wst.jsdt.internal.core;
import java.util.Iterator;
import org.eclipse.jface.text.IDocument;
import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
import org.eclipse.wst.jsdt.core.IField;
import org.eclipse.wst.jsdt.core.IJavaScriptElement;
import org.eclipse.wst.jsdt.core.IJavaScriptModelStatus;
import org.eclipse.wst.jsdt.core.IJavaScriptModelStatusConstants;
import org.eclipse.wst.jsdt.core.IParent;
import org.eclipse.wst.jsdt.core.IType;
import org.eclipse.wst.jsdt.core.JavaScriptModelException;
import org.eclipse.wst.jsdt.core.dom.ASTNode;
import org.eclipse.wst.jsdt.core.dom.FieldDeclaration;
import org.eclipse.wst.jsdt.core.dom.SimpleName;
import org.eclipse.wst.jsdt.core.dom.VariableDeclarationFragment;
import org.eclipse.wst.jsdt.core.dom.rewrite.ASTRewrite;
import org.eclipse.wst.jsdt.internal.core.util.Messages;
/**
* <p>
* This operation creates a field declaration in a type.
*
* <p>
* Required Attributes:
* <ul>
* <li>Containing Type
* <li>The source code for the declaration. No verification of the source is
* performed.
* </ul>
*/
public class CreateFieldOperation extends CreateTypeMemberOperation {
/**
* When executed, this operation will create a field with the given name in
* the given type with the specified source.
*
* <p>
* By default the new field is positioned after the last existing field
* declaration, or as the first member in the type if there are no field
* declarations.
*/
public CreateFieldOperation(IJavaScriptElement parentElement, String source,
boolean force) {
super(parentElement, source, force);
}
protected ASTNode generateElementAST(ASTRewrite rewriter,
IDocument document, IJavaScriptUnit cu) throws JavaScriptModelException {
ASTNode node = super.generateElementAST(rewriter, document, cu);
if (node.getNodeType() != ASTNode.FIELD_DECLARATION)
throw new JavaScriptModelException(new JavaModelStatus(
IJavaScriptModelStatusConstants.INVALID_CONTENTS));
return node;
}
/**
* @see CreateElementInCUOperation#generateResultHandle
*/
protected IJavaScriptElement generateResultHandle() {
if (getType()!=null)
return getType().getField(getASTNodeName());
return getCompilationUnit().getField(getASTNodeName());
}
/**
* @see CreateElementInCUOperation#getMainTaskName()
*/
public String getMainTaskName() {
return Messages.operation_createFieldProgress;
}
private VariableDeclarationFragment getFragment(ASTNode node) {
Iterator fragments = ((FieldDeclaration) node).fragments().iterator();
if (this.anchorElement != null) {
VariableDeclarationFragment fragment = null;
String fragmentName = this.anchorElement.getElementName();
while (fragments.hasNext()) {
fragment = (VariableDeclarationFragment) fragments.next();
if (fragment.getName().getIdentifier().equals(fragmentName)) {
return fragment;
}
}
return fragment;
} else {
return (VariableDeclarationFragment) fragments.next();
}
}
/**
* By default the new field is positioned after the last existing field
* declaration, or as the first member in the type if there are no field
* declarations.
*/
protected void initializeDefaultPosition() {
IField[] fields = null;
IParent parentElement;
try {
if (getType() != null) {
parentElement = getType();
fields = getType().getFields();
} else {
parentElement = getCompilationUnit();
fields = getCompilationUnit().getFields();
}
if (fields != null && fields.length > 0) {
final IField lastField = fields[fields.length - 1];
// if (parentElement.isEnum()) {
// IField field = lastField;
// if (!field.isEnumConstant()) {
// createAfter(lastField);
// }
// } else {
createAfter(lastField);
// }
} else {
IJavaScriptElement[] elements = parentElement.getChildren();
if (elements != null && elements.length > 0) {
createBefore(elements[0]);
}
}
} catch (JavaScriptModelException e) {
// type doesn't exist: ignore
}
}
/**
* @see CreateTypeMemberOperation#verifyNameCollision
*/
protected IJavaScriptModelStatus verifyNameCollision() {
if (this.createdNode != null) {
IType type = getType();
String fieldName = getASTNodeName();
if (type != null) {
if (type.getField(fieldName).exists()) {
return new JavaModelStatus(
IJavaScriptModelStatusConstants.NAME_COLLISION, Messages
.bind(Messages.status_nameCollision,
fieldName));
}
} else {
if (getCompilationUnit().getField(fieldName).exists()) {
return new JavaModelStatus(
IJavaScriptModelStatusConstants.NAME_COLLISION, Messages
.bind(Messages.status_nameCollision,
fieldName));
}
}
}
return JavaModelStatus.VERIFIED_OK;
}
private String getASTNodeName() {
if (this.alteredName != null)
return this.alteredName;
return getFragment(this.createdNode).getName().getIdentifier();
}
protected SimpleName rename(ASTNode node, SimpleName newName) {
VariableDeclarationFragment fragment = getFragment(node);
SimpleName oldName = fragment.getName();
fragment.setName(newName);
return oldName;
}
}