| /******************************************************************************* |
| * Copyright (c) 2010, 2011 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.jst.jsp.ui.internal.breakpointproviders; |
| |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IExtensionRegistry; |
| import org.eclipse.core.runtime.RegistryFactory; |
| import org.eclipse.jst.jsp.ui.internal.JSPUIPlugin; |
| |
| import com.ibm.icu.util.StringTokenizer; |
| |
| /** |
| * This registry provides all additional class patterns to be associated with a specific content type |
| * |
| */ |
| public class ClassPatternRegistry { |
| |
| private static ClassPatternRegistry fInstance = null; |
| |
| private Map fPatterns = null; |
| |
| private ClassPatternRegistry() { |
| IExtensionRegistry registry = RegistryFactory.getRegistry(); |
| if (registry != null) { |
| IConfigurationElement[] elements = RegistryFactory.getRegistry().getConfigurationElementsFor(JSPUIPlugin.ID, "classPatternProvider"); //$NON-NLS-1$ |
| fPatterns = new HashMap(elements.length); |
| for (int i = 0; i < elements.length; i++) { |
| final IConfigurationElement element = elements[i]; |
| final String contentType = element.getAttribute("contentType"); //$NON-NLS-1$ |
| final String pattern = element.getAttribute("pattern"); //$NON-NLS-1$ |
| if (pattern != null && contentType != null) { |
| final StringTokenizer tokenizer = new StringTokenizer(pattern, ","); //$NON-NLS-1$ |
| Set patterns = (Set) fPatterns.get(contentType); |
| if (patterns == null) { |
| patterns = new HashSet(0); |
| fPatterns.put(contentType, patterns); |
| } |
| |
| while (tokenizer.hasMoreTokens()) { |
| String token = tokenizer.nextToken(); |
| token = token.trim(); |
| if (token.length() > 0) { |
| patterns.add(token); |
| } |
| } |
| } |
| |
| } |
| } |
| } |
| |
| /** |
| * Returns the additional class patterns to be associated with the provided content type id. |
| * @param contentType the content type id to find patterns for |
| * @return an String for the additional class patterns |
| */ |
| public String getClassPattern(String contentType) { |
| if (fPatterns == null) |
| return null; |
| final Set patterns = (Set) fPatterns.get(contentType); |
| if (patterns != null) { |
| final Iterator it = patterns.iterator(); |
| final StringBuffer buffer = new StringBuffer(); |
| while (it.hasNext()) { |
| if (buffer.length() > 0) |
| buffer.append(','); |
| buffer.append(it.next()); |
| } |
| return buffer.toString(); |
| } |
| return null; |
| } |
| |
| public Iterator getClassPatternSegments(String contentType) { |
| Iterator result = EMPTY; |
| if (fPatterns != null) { |
| Set patterns = (Set) fPatterns.get(contentType); |
| if (patterns != null) |
| result = patterns.iterator(); |
| } |
| return result; |
| } |
| |
| private static final Iterator EMPTY = new Iterator() { |
| |
| /* (non-Javadoc) |
| * @see java.util.Iterator#hasNext() |
| */ |
| public boolean hasNext() { |
| return false; |
| } |
| |
| /* (non-Javadoc) |
| * @see java.util.Iterator#next() |
| */ |
| public Object next() { |
| return null; |
| } |
| |
| /* (non-Javadoc) |
| * @see java.util.Iterator#remove() |
| */ |
| public void remove() {} |
| |
| }; |
| |
| public static synchronized ClassPatternRegistry getInstance() { |
| if (fInstance == null) { |
| fInstance = new ClassPatternRegistry(); |
| } |
| return fInstance; |
| } |
| } |