| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.myfaces.extensions.scripting.jsf.resources.deprecated; |
| |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.util.Comparator; |
| |
| /** |
| * Base class for resource loaders. Resource loaders can lookup resources |
| * as URLs from arbitrary locations, including JAR files. |
| * |
| * @author Leonardo Uribe (latest modification by $Author: lu4242 $) |
| * @version $Revision: 882702 $ $Date: 2009-11-20 15:16:07 -0500 (Vie, 20 Nov 2009) $ |
| * @deprecated |
| */ |
| public abstract class ResourceLoader |
| { |
| |
| public static final String VERSION_INVALID = "INVALID"; |
| |
| private String _prefix; |
| |
| public ResourceLoader(String prefix) |
| { |
| _prefix = prefix; |
| } |
| |
| /** |
| * Gets the resource version of a specifiy resource |
| * |
| * @param path the resource path |
| * @return the version of the resource as String |
| */ |
| public abstract String getResourceVersion(String path); |
| |
| /** |
| * Return the max available version found (if exists) or |
| * return null if no version available. |
| * |
| * @param path the path to the library |
| * @return the available version or null |
| */ |
| public abstract String getLibraryVersion(String path); |
| |
| /** |
| * Return the resourource url from the given meta data |
| * |
| * @param resourceMeta the resource metadata |
| * @return the resourource url from the given meta data |
| */ |
| public abstract URL getResourceURL(ResourceMeta resourceMeta); |
| |
| /** |
| * Returns an input stream on a given resource defined by resource meta |
| * |
| * @param resourceMeta the resource metadata |
| * @return an input stream on the given resource |
| */ |
| public abstract InputStream getResourceInputStream(ResourceMeta resourceMeta); |
| |
| /** |
| * creates a resource meta data object |
| * @param prefix the prefix for the resource |
| * @param libraryName the library name |
| * @param libraryVersion the library version |
| * @param resourceName the resource name |
| * @param resourceVersion and the version |
| * @return a ResourceMeta object of the information passed to this method |
| */ |
| public abstract ResourceMeta createResourceMeta(String prefix, String libraryName, String libraryVersion, |
| String resourceName, String resourceVersion); |
| |
| /** |
| * checks if the library exists |
| * @param libraryName the library name to check for |
| * @return true if it exists |
| */ |
| public abstract boolean libraryExists(String libraryName); |
| |
| private Comparator<String> _versionComparator = null; |
| |
| protected Comparator<String> getVersionComparator() |
| { |
| if (_versionComparator == null) |
| { |
| _versionComparator = new VersionComparator(); |
| } |
| return _versionComparator; |
| } |
| |
| protected void setVersionComparator(Comparator<String> versionComparator) |
| { |
| _versionComparator = versionComparator; |
| } |
| |
| protected class VersionComparator implements Comparator<String> |
| { |
| |
| /** |
| * Standard comoare method |
| * @param s1 string1 to compare |
| * @param s2 string2 to compare |
| * @return standard numeric compare result |
| */ |
| public int compare(String s1, String s2) |
| { |
| int n1 = 0; |
| int n2 = 0; |
| String o1 = s1; |
| String o2 = s2; |
| |
| boolean p1 = true; |
| boolean p2 = true; |
| |
| while (n1 == n2 && (p1 || p2)) |
| { |
| int i1 = o1.indexOf('_'); |
| int i2 = o2.indexOf('_'); |
| if (i1 < 0) |
| { |
| if (o1.length() > 0) |
| { |
| p1 = false; |
| n1 = Integer.valueOf(o1); |
| o1 = ""; |
| } |
| else |
| { |
| p1 = false; |
| n1 = 0; |
| } |
| } |
| else |
| { |
| n1 = Integer.valueOf(o1.substring(0, i1)); |
| o1 = o1.substring(i1 + 1); |
| } |
| if (i2 < 0) |
| { |
| if (o2.length() > 0) |
| { |
| p2 = false; |
| n2 = Integer.valueOf(o2); |
| o2 = ""; |
| } |
| else |
| { |
| p2 = false; |
| n2 = 0; |
| } |
| } |
| else |
| { |
| n2 = Integer.valueOf(o2.substring(0, i2)); |
| o2 = o2.substring(i2 + 1); |
| } |
| } |
| |
| if (n1 == n2) |
| { |
| return s1.length() - s2.length(); |
| } |
| return n1 - n2; |
| } |
| } |
| |
| /** |
| * getter for the standard resource loader prefix |
| * @return the resource loader prefix |
| */ |
| public String getPrefix() |
| { |
| return _prefix; |
| } |
| |
| /** |
| * setter for the prefix |
| * @param prefix the prefix satring used for the resource loader |
| */ |
| public void setPrefix(String prefix) |
| { |
| _prefix = prefix; |
| } |
| } |