StandardFileSystems class in core-api introduced

platform/core-api/src/com/intellij/openapi/vfs/StandardFileSystems.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2000-2012 JetBrains s.r.o.
+ *
+ * Licensed 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 com.intellij.openapi.vfs;
+
+import com.intellij.openapi.util.NotNullLazyValue;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author yole
+ */
+public class StandardFileSystems {
+  public static String FILE_PROTOCOL = "file";
+  public static String JAR_PROTOCOL = "jar";
+
+  private static final NotNullLazyValue<VirtualFileSystem> ourLocal = new NotNullLazyValue<VirtualFileSystem>() {
+    @NotNull
+    @Override
+    protected VirtualFileSystem compute() {
+      return VirtualFileManager.getInstance().getFileSystem(FILE_PROTOCOL);
+    }
+  };
+
+  private static final NotNullLazyValue<VirtualFileSystem> ourJar = new NotNullLazyValue<VirtualFileSystem>() {
+    @NotNull
+    @Override
+    protected VirtualFileSystem compute() {
+      return VirtualFileManager.getInstance().getFileSystem(JAR_PROTOCOL);
+    }
+  };
+
+  public static VirtualFileSystem local() {
+    return ourLocal.getValue();
+  }
+
+  public static VirtualFileSystem jar() {
+    return ourJar.getValue();
+  }
+}

platform/core-impl/src/com/intellij/openapi/vfs/impl/jar/CoreJarFileSystem.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2011 JetBrains s.r.o.
+ * Copyright 2000-2012 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 package com.intellij.openapi.vfs.impl.jar;
 
 import com.intellij.openapi.vfs.DeprecatedVirtualFileSystem;
+import com.intellij.openapi.vfs.StandardFileSystems;
 import com.intellij.openapi.vfs.VirtualFile;
 import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
@@ -33,7 +34,7 @@ public class CoreJarFileSystem extends DeprecatedVirtualFileSystem {
   @NotNull
   @Override
   public String getProtocol() {
-    return "jar";
+    return StandardFileSystems.JAR_PROTOCOL;
   }
 
   @Override

platform/core-impl/src/com/intellij/openapi/vfs/local/CoreLocalFileSystem.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2011 JetBrains s.r.o.
+ * Copyright 2000-2012 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 package com.intellij.openapi.vfs.local;
 
 import com.intellij.openapi.vfs.DeprecatedVirtualFileSystem;
+import com.intellij.openapi.vfs.StandardFileSystems;
 import com.intellij.openapi.vfs.VirtualFile;
 import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
@@ -30,7 +31,7 @@ public class CoreLocalFileSystem extends DeprecatedVirtualFileSystem {
   @NotNull
   @Override
   public String getProtocol() {
-    return "file";
+    return StandardFileSystems.FILE_PROTOCOL;
   }
 
   @Override

platform/platform-api/src/com/intellij/openapi/vfs/JarFileSystem.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2009 JetBrains s.r.o.
+ * Copyright 2000-2012 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,7 +26,7 @@ import java.io.IOException;
 import java.util.zip.ZipFile;
 
 public abstract class JarFileSystem extends NewVirtualFileSystem {
-  @NonNls public static final String PROTOCOL = "jar";
+  @NonNls public static final String PROTOCOL = StandardFileSystems.JAR_PROTOCOL;
   @NonNls public static final String PROTOCOL_PREFIX = "jar://";
   @NonNls public static final String JAR_SEPARATOR = "!/";
 

platform/platform-api/src/com/intellij/openapi/vfs/LocalFileSystem.java

@@ -31,7 +31,7 @@ import java.util.Set;
 import static java.util.Collections.singleton;
 
 public abstract class LocalFileSystem extends NewVirtualFileSystem {
-  @NonNls public static final String PROTOCOL = "file";
+  @NonNls public static final String PROTOCOL = StandardFileSystems.FILE_PROTOCOL;
   @NonNls public static final String PROTOCOL_PREFIX = PROTOCOL + "://";
 
   @SuppressWarnings("UtilityClassWithoutPrivateConstructor")