| /****************************************************************************** |
| * Copyright (c) 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.sse.core.internal.propertytester; |
| |
| import org.eclipse.core.expressions.PropertyTester; |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.core.runtime.content.IContentDescription; |
| import org.eclipse.core.runtime.content.IContentType; |
| import org.eclipse.wst.sse.core.internal.Logger; |
| |
| /** |
| * A Property Tester that operates on IFiles and validates |
| * that the expected content type id matches that of the content |
| * type of the file, or any of the base content types. |
| * |
| * Based on org.eclipse.core.internal.propertytester.FilePropertyTester |
| * |
| */ |
| public class StructuredFilePropertyTester extends PropertyTester { |
| |
| /** |
| * A property indicating that we are looking to verify that the file matches |
| * the content type matching the given identifier. The identifier is |
| * provided as the expected value. |
| */ |
| private static final String PROPERTY_CONTENT_TYPE_ID = "contentTypeId"; //$NON-NLS-1$ |
| |
| /* |
| * (non-Javadoc) |
| * @see org.eclipse.core.expressions.IPropertyTester#test(java.lang.Object, java.lang.String, java.lang.Object[], java.lang.Object) |
| */ |
| public boolean test(Object receiver, String property, Object[] args, Object expectedValue) { |
| if(PROPERTY_CONTENT_TYPE_ID.equals(property) && (expectedValue != null) && (receiver instanceof IFile) && ((IFile) receiver).exists()) |
| return testContentType((IFile) receiver, expectedValue.toString()); |
| return false; |
| } |
| |
| /** |
| * Tests whether the content type for <code>file</code> (or any base content types) |
| * matches the <code>contentTypeId</code>. It is possible that this method call could |
| * cause the file to be read. It is also possible (through poor plug-in |
| * design) for this method to load plug-ins. |
| * |
| * @param file |
| * The file for which the content type should be determined; must |
| * not be <code>null</code>. |
| * @param contentTypeId |
| * The expected content type; must not be <code>null</code>. |
| * @return <code>true</code> if the file's content type (or base content types) |
| * has an identifier that matches <code>contentTypeId</code>; |
| * <code>false</code> otherwise. |
| */ |
| private boolean testContentType(final IFile file, String contentTypeId) { |
| final String expectedValue = contentTypeId.trim(); |
| |
| try { |
| IContentDescription contentDescription = file.getContentDescription(); |
| if (contentDescription != null) { |
| IContentType contentType = contentDescription.getContentType(); |
| while (contentType != null) { |
| if (expectedValue.equals(contentType.getId())) |
| return true; |
| contentType = contentType.getBaseType(); |
| } |
| } |
| } |
| catch (Exception e) { |
| // [232831] - Log messages only when debugging |
| if(Logger.DEBUG) |
| Logger.logException(e); |
| } |
| return false; |
| } |
| } |