src/commons/org/codehaus/groovy/grails/plugins/GrailsPluginUtils.groovy

   1 /* Copyright 2004-2005 Graeme Rocher
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at
   6  *
   7  *      http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 package org.codehaus.groovy.grails.plugins;
  16
  17 /**
  18  * Utility class containing methods that aid in loading and evaluating plug-ins
  19  *
  20  * @author Graeme Rocher
  21  * @since 1.0
  22  *        <p/>
  23  *        Created: Nov 29, 2007
  24  */
  25 public class GrailsPluginUtils {
  26
  27     static final String WILDCARD = "*";
  28     static final COMPARATOR = [compare: { o1, o2 ->
  29         def result = 0
  30         if(o1 == '*') result = 1
  31         else if(o2 == '*') result = -1
  32         else {
  33             def nums1 = o1.split(/\./).findAll { it.trim() != ''}*.toInteger()
  34             def nums2 = o2.split(/\./).findAll { it.trim() != ''}*.toInteger()
  35             for(i in 0..<nums1.size()) {
  36                 if(nums2.size() > i) {
  37                     result = nums1[i].compareTo(nums2[i])
  38                     if(result != 0)break
  39                 }
  40             }
  41         }
  42             result
  43         },
  44         equals: { false }] as Comparator
  45
  46     /**
  47      * Check if the required version is a valid for the given plugin version
  48      *
  49      * @param pluginVersion The plugin version
  50      * @param requiredVersion The required version
  51      * @return True if it is valid
  52      */
  53     public static boolean isValidVersion(String pluginVersion, String requiredVersion) {
  54
  55         pluginVersion = trimTag(pluginVersion);
  56
  57        if(requiredVersion.indexOf('>')>-1) {
  58             def tokens = requiredVersion.split(">")*.trim()
  59             def newTokens = []
  60             for(t in tokens) {
  61                 newTokens << trimTag(t)
  62             }
  63
  64             tokens << pluginVersion
  65             tokens = tokens.sort(COMPARATOR)
  66
  67             if(tokens[1] == pluginVersion) return true
  68
  69         }
  70         else if(pluginVersion.equals(trimTag(requiredVersion))) return true;
  71         return false;
  72     }
  73
  74     private static trimTag(pluginVersion) {
  75         def i = pluginVersion.indexOf('-')
  76         if(i>-1)
  77             pluginVersion = pluginVersion[0..i-1]
  78         pluginVersion
  79     }
  80
  81 }