plugins/IntelliLang/src/org/intellij/plugins/intelliLang/inject/config/JspSupportProxy.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.intellij.plugins.intelliLang.inject.config;
  18
  19 import com.intellij.openapi.components.ServiceManager;
  20 import com.intellij.openapi.module.Module;
  21 import com.intellij.psi.impl.source.jsp.JspManager;
  22 import org.jetbrains.annotations.NotNull;
  23 import org.jetbrains.annotations.Nullable;
  24
  25 /**
  26  * Proxy class that allows to avoid a hard compile time dependency on the XPathView plugin.
  27  */
  28 public abstract class JspSupportProxy {
  29
  30   @NotNull
  31   public abstract String[] getPossibleTldUris(final Module module);
  32
  33   private static JspSupportProxy ourInstance;
  34   private static boolean isInitialized;
  35
  36   @Nullable
  37   public static synchronized JspSupportProxy getInstance() {
  38     if (isInitialized) {
  39       return ourInstance;
  40     }
  41     try {
  42       return ourInstance = ServiceManager.getService(JspSupportProxy.class);
  43     } finally {
  44       isInitialized = true;
  45     }
  46   }
  47
  48   public static class Impl extends JspSupportProxy {
  49     @NotNull
  50     @Override
  51     public String[] getPossibleTldUris(Module module) {
  52       return JspManager.getInstance(module.getProject()).getPossibleTldUris(module);
  53     }
  54   }
  55 }