plugins/devkit/src/projectRoots/IdeaJdk.java - platform/tools/idea - Git at Google

 /*
  * Copyright 2000-2014 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 org.jetbrains.idea.devkit.projectRoots;

 import com.intellij.openapi.application.PathManager;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.projectRoots.*;
 import com.intellij.openapi.projectRoots.impl.JavaDependentSdkType;
 import com.intellij.openapi.roots.AnnotationOrderRootType;
 import com.intellij.openapi.roots.JavadocOrderRootType;
 import com.intellij.openapi.roots.OrderRootType;
 import com.intellij.openapi.ui.Messages;
 import com.intellij.openapi.util.InvalidDataException;
 import com.intellij.openapi.util.SystemInfo;
 import com.intellij.openapi.util.WriteExternalException;
 import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.util.io.ZipFileCache;
 import com.intellij.openapi.vfs.JarFileSystem;
 import com.intellij.openapi.vfs.VfsUtilCore;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.openapi.vfs.VirtualFileManager;
 import com.intellij.util.ArrayUtil;
 import icons.DevkitIcons;
 import org.jdom.Element;
 import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.idea.devkit.DevKitBundle;

 import javax.swing.*;
 import java.io.DataInputStream;
 import java.io.File;
 import java.io.FileFilter;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;

 /**
  * @author anna
  * @since Nov 22, 2004
  */
 public class IdeaJdk extends JavaDependentSdkType implements JavaSdkType {
   private static final Icon ADD_SDK = DevkitIcons.Add_sdk;
   private static final Icon SDK_CLOSED = DevkitIcons.Sdk_closed;

   private static final Logger LOG = Logger.getInstance("#org.jetbrains.idea.devkit.projectRoots.IdeaJdk");
   @NonNls private static final String LIB_DIR_NAME = "lib";
   @NonNls private static final String SRC_DIR_NAME = "src";
   @NonNls private static final String PLUGINS_DIR = "plugins";

   public IdeaJdk() {
     super("IDEA JDK");
   }

   public Icon getIcon() {
     return SDK_CLOSED;
   }

   @NotNull
   @Override
   public String getHelpTopic() {
     return "reference.project.structure.sdk.idea";
   }

   public Icon getIconForAddAction() {
     return ADD_SDK;
   }

   public String suggestHomePath() {
     return PathManager.getHomePath().replace(File.separatorChar, '/');
   }

   @Override
   public String adjustSelectedSdkHome(String homePath) {
     if (SystemInfo.isMac) {
       File home = new File(homePath, "Contents");
       if (home.exists()) return home.getPath();
     }
     return super.adjustSelectedSdkHome(homePath);
   }

   public boolean isValidSdkHome(String path) {
     if (isFromIDEAProject(path)) {
       return true;
     }
     File home = new File(path);
     if (!home.exists()) {
       return false;
     }
     if (getBuildNumber(path) == null || getOpenApiJar(path) == null) {
       return false;
     }
     return true;
   }

   @Nullable
   private static File getOpenApiJar(String home) {
     @NonNls final String openapiJar = "openapi.jar";
     @NonNls final String platformApiJar = "platform-api.jar";
     final File libDir = new File(home, LIB_DIR_NAME);
     File f = new File(libDir, openapiJar);
     if (f.exists()) return f;
     f = new File(libDir, platformApiJar);
     if (f.exists()) return f;
     return null;
   }

   public static boolean isFromIDEAProject(String path) {
     File home = new File(path);
     File[] openapiDir = home.listFiles(new FileFilter() {
       public boolean accept(File pathname) {
         @NonNls final String name = pathname.getName();
         if (name.equals("openapi") && pathname.isDirectory()) return true; //todo
         return false;
       }
     });
     return openapiDir != null && openapiDir.length != 0;
   }

   @Nullable
   public final String getVersionString(@NotNull final Sdk sdk) {
     final Sdk internalJavaSdk = getInternalJavaSdk(sdk);
     return internalJavaSdk != null ? internalJavaSdk.getVersionString() : null;
   }

   @Nullable
   private static Sdk getInternalJavaSdk(final Sdk sdk) {
     final SdkAdditionalData data = sdk.getSdkAdditionalData();
     if (data instanceof Sandbox) {
       return ((Sandbox)data).getJavaSdk();
     }
     return null;
   }

   public String suggestSdkName(String currentSdkName, String sdkHome) {
     @NonNls final String productName;
     if (new File(sdkHome, "lib/rubymine.jar").exists()) {
       productName = "RubyMine ";
     }
     else if (new File(sdkHome, "lib/pycharm.jar").exists()) {
       productName = "PyCharm ";
     }
     else if (new File(sdkHome, "lib/webide.jar").exists()) {
       productName = "WebStorm/PhpStorm ";
     }
     else if (new File(sdkHome, "license/AppCode_license.txt").exists()) {
       productName = "AppCode ";
     }
     else if (new File(sdkHome, "license/CLion_Preview_License.txt").exists()) {
       productName = "CLion ";
     }
     else {
       productName = "IDEA ";
     }
     String buildNumber = getBuildNumber(sdkHome);
     return productName + (buildNumber != null ? buildNumber : "");
   }

   @Nullable
   public static String getBuildNumber(String ideaHome) {
     try {
       @NonNls final String buildTxt = "/build.txt";
       return FileUtil.loadFile(new File(ideaHome + buildTxt)).trim();
     }
     catch (IOException e) {
       return null;
     }
   }

   private static VirtualFile[] getIdeaLibrary(String home) {
     String plugins = home + File.separator + PLUGINS_DIR + File.separator;
     ArrayList<VirtualFile> result = new ArrayList<VirtualFile>();
     appendIdeaLibrary(home, result, "junit.jar");
     appendIdeaLibrary(plugins + "JavaEE", result, "javaee-impl.jar", "jpa-console.jar");
     appendIdeaLibrary(plugins + "PersistenceSupport", result, "persistence-impl.jar");
     appendIdeaLibrary(plugins + "DatabaseTools", result, "database-impl.jar", "jdbc-console.jar");
     appendIdeaLibrary(plugins + "css", result, "css.jar");
     appendIdeaLibrary(plugins + "uml", result, "uml-support.jar");
     appendIdeaLibrary(plugins + "Spring", result,
                       "spring.jar", "spring-el.jar", "spring-jsf.jar", "spring-persistence-integration.jar");
     return VfsUtilCore.toVirtualFileArray(result);
   }

   private static void appendIdeaLibrary(final String libDirPath,
                                         final ArrayList<VirtualFile> result,
                                         @NonNls final String... forbidden) {
     Arrays.sort(forbidden);
     final String path = libDirPath + File.separator + LIB_DIR_NAME;
     final JarFileSystem jfs = JarFileSystem.getInstance();
     final File lib = new File(path);
     if (lib.isDirectory()) {
       File[] jars = lib.listFiles();
       if (jars != null) {
         for (File jar : jars) {
           @NonNls String name = jar.getName();
           if (jar.isFile() && Arrays.binarySearch(forbidden, name) < 0 && (name.endsWith(".jar") || name.endsWith(".zip"))) {
             result.add(jfs.findFileByPath(jar.getPath() + JarFileSystem.JAR_SEPARATOR));
           }
         }
       }
     }
   }


   public boolean setupSdkPaths(final Sdk sdk, SdkModel sdkModel) {
     final Sandbox additionalData = (Sandbox)sdk.getSdkAdditionalData();
     if (additionalData != null) {
       additionalData.cleanupWatchedRoots();
     }

     final SdkModificator sdkModificator = sdk.getSdkModificator();

     final List<String> javaSdks = new ArrayList<String>();
     final Sdk[] sdks = sdkModel.getSdks();
     for (Sdk jdk : sdks) {
       if (isValidInternalJdk(sdk, jdk)) {
         javaSdks.add(jdk.getName());
       }
     }
     if (javaSdks.isEmpty()){
       JavaSdkVersion requiredVersion = getRequiredJdkVersion(sdk);
       if (requiredVersion != null) {
         Messages.showErrorDialog(DevKitBundle.message("no.java.sdk.for.idea.sdk.found", requiredVersion), "No Java SDK Found");
       }
       else {
         Messages.showErrorDialog(DevKitBundle.message("no.idea.sdk.version.found"), "No Java SDK Found");
       }
       return false;
     }

     final int choice = Messages
       .showChooseDialog("Select Java SDK to be used for " + DevKitBundle.message("sdk.title"),
                         "Select Internal Java Platform",
                         ArrayUtil.toStringArray(javaSdks), javaSdks.get(0),
                         Messages.getQuestionIcon());

     if (choice != -1) {
       final String name = javaSdks.get(choice);
       final Sdk jdk = sdkModel.findSdk(name);
       LOG.assertTrue(jdk != null);
       setupSdkPaths(sdkModificator, sdk.getHomePath(), jdk);
       sdkModificator.setSdkAdditionalData(new Sandbox(getDefaultSandbox(), jdk, sdk));
       sdkModificator.setVersionString(jdk.getVersionString());
       sdkModificator.commitChanges();
       return true;
     }
     return false;
   }

   public static boolean isValidInternalJdk(Sdk ideaSdk, Sdk sdk) {
     final SdkTypeId sdkType = sdk.getSdkType();
     if (sdkType instanceof JavaSdk) {
       final JavaSdkVersion version = JavaSdk.getInstance().getVersion(sdk);
       JavaSdkVersion requiredVersion = getRequiredJdkVersion(ideaSdk);
       if (version != null && requiredVersion != null) {
         return version.isAtLeast(requiredVersion);
       }
     }
     return false;
   }

   private static int getIdeaClassFileVersion(Sdk ideaSdk) {
     try {
       File apiJar = getOpenApiJar(ideaSdk.getHomePath());
       if (apiJar != null) {
         ZipFile zipFile = ZipFileCache.acquire(apiJar.getPath());
         try {
           ZipEntry entry = zipFile.getEntry("com/intellij/psi/PsiManager.class");
           if (entry != null) {
             DataInputStream stream = new DataInputStream(zipFile.getInputStream(entry));
             try {
               if (stream.skip(6) == 6) {
                 return stream.readUnsignedShort();
               }
             }
             finally {
               stream.close();
             }
           }
         }
         finally {
           ZipFileCache.release(zipFile);
         }
       }
     }
     catch (IOException ignored) { }

     return -1;
   }

   @Nullable
   private static JavaSdkVersion getRequiredJdkVersion(final Sdk ideaSdk) {
     int classFileVersion = getIdeaClassFileVersion(ideaSdk);
     switch(classFileVersion) {
       case 48: return JavaSdkVersion.JDK_1_4;
       case 49: return JavaSdkVersion.JDK_1_5;
       case 50: return JavaSdkVersion.JDK_1_6;
       case 51: return JavaSdkVersion.JDK_1_7;
     }
     return null;
   }

   public static void setupSdkPaths(final SdkModificator sdkModificator, final String sdkHome, final Sdk internalJava) {
     //roots from internal jre
     addClasses(sdkModificator, internalJava);
     addDocs(sdkModificator, internalJava);
     addSources(sdkModificator, internalJava);
     //roots for openapi and other libs
     if (!isFromIDEAProject(sdkHome)) {
       final VirtualFile[] ideaLib = getIdeaLibrary(sdkHome);
       if (ideaLib != null) {
         for (VirtualFile aIdeaLib : ideaLib) {
           sdkModificator.addRoot(aIdeaLib, OrderRootType.CLASSES);
         }
       }
       addSources(new File(sdkHome), sdkModificator);
     }
   }

   static String getDefaultSandbox() {
     @NonNls String defaultSandbox = "";
     try {
       defaultSandbox = new File(PathManager.getSystemPath()).getCanonicalPath() + File.separator + "plugins-sandbox";
     }
     catch (IOException e) {
       //can't be on running instance
     }
     return defaultSandbox;
   }

   private static void addSources(File file, SdkModificator sdkModificator) {
     final File src = new File(new File(file, LIB_DIR_NAME), SRC_DIR_NAME);
     if (!src.exists()) return;
     File[] srcs = src.listFiles(new FileFilter() {
       public boolean accept(File pathname) {
         @NonNls final String path = pathname.getPath();
         //noinspection SimplifiableIfStatement
         if (path.contains("generics")) return false;
         return path.endsWith(".jar") || path.endsWith(".zip");
       }
     });
     for (int i = 0; srcs != null && i < srcs.length; i++) {
       File jarFile = srcs[i];
       if (jarFile.exists()) {
         JarFileSystem jarFileSystem = JarFileSystem.getInstance();
         String path = jarFile.getAbsolutePath().replace(File.separatorChar, '/') + JarFileSystem.JAR_SEPARATOR;
         jarFileSystem.setNoCopyJarForPath(path);
         VirtualFile vFile = jarFileSystem.findFileByPath(path);
         sdkModificator.addRoot(vFile, OrderRootType.SOURCES);
       }
     }
   }

   private static void addClasses(SdkModificator sdkModificator, final Sdk javaSdk) {
     addOrderEntries(OrderRootType.CLASSES, javaSdk, sdkModificator);
   }

   private static void addDocs(SdkModificator sdkModificator, final Sdk javaSdk) {
     if (!addOrderEntries(JavadocOrderRootType.getInstance(), javaSdk, sdkModificator) &&
         SystemInfo.isMac){
       Sdk[] jdks = ProjectJdkTable.getInstance().getAllJdks();
       for (Sdk jdk : jdks) {
         if (jdk.getSdkType() instanceof JavaSdk) {
           addOrderEntries(JavadocOrderRootType.getInstance(), jdk, sdkModificator);
           break;
         }
       }
     }
   }

   private static void addSources(SdkModificator sdkModificator, final Sdk javaSdk) {
     if (javaSdk != null) {
       if (!addOrderEntries(OrderRootType.SOURCES, javaSdk, sdkModificator)){
         if (SystemInfo.isMac) {
           Sdk[] jdks = ProjectJdkTable.getInstance().getAllJdks();
           for (Sdk jdk : jdks) {
             if (jdk.getSdkType() instanceof JavaSdk) {
               addOrderEntries(OrderRootType.SOURCES, jdk, sdkModificator);
               break;
             }
           }
         }
         else {
           final File jdkHome = new File(javaSdk.getHomePath()).getParentFile();
           @NonNls final String srcZip = "src.zip";
           final File jarFile = new File(jdkHome, srcZip);
           if (jarFile.exists()){
             JarFileSystem jarFileSystem = JarFileSystem.getInstance();
             String path = jarFile.getAbsolutePath().replace(File.separatorChar, '/') + JarFileSystem.JAR_SEPARATOR;
             jarFileSystem.setNoCopyJarForPath(path);
             sdkModificator.addRoot(jarFileSystem.findFileByPath(path), OrderRootType.SOURCES);
           }
         }
       }
     }
   }

   private static boolean addOrderEntries(OrderRootType orderRootType, Sdk sdk, SdkModificator toModificator){
     boolean wasSmthAdded = false;
     final String[] entries = sdk.getRootProvider().getUrls(orderRootType);
     for (String entry : entries) {
       VirtualFile virtualFile = VirtualFileManager.getInstance().findFileByUrl(entry);
       if (virtualFile != null) {
         toModificator.addRoot(virtualFile, orderRootType);
         wasSmthAdded = true;
       }
     }
     return wasSmthAdded;
   }

   public AdditionalDataConfigurable createAdditionalDataConfigurable(final SdkModel sdkModel, SdkModificator sdkModificator) {
     return new IdeaJdkConfigurable(sdkModel, sdkModificator);
   }

   @Nullable
   public String getBinPath(@NotNull Sdk sdk) {
     final Sdk internalJavaSdk = getInternalJavaSdk(sdk);
     return internalJavaSdk == null ? null : JavaSdk.getInstance().getBinPath(internalJavaSdk);
   }

   @Nullable
   public String getToolsPath(@NotNull Sdk sdk) {
     final Sdk jdk = getInternalJavaSdk(sdk);
     if (jdk != null && jdk.getVersionString() != null){
       return JavaSdk.getInstance().getToolsPath(jdk);
     }
     return null;
   }

   @Nullable
   public String getVMExecutablePath(@NotNull Sdk sdk) {
     final Sdk internalJavaSdk = getInternalJavaSdk(sdk);
     return internalJavaSdk == null ? null : JavaSdk.getInstance().getVMExecutablePath(internalJavaSdk);
   }

   public void saveAdditionalData(@NotNull SdkAdditionalData additionalData, @NotNull Element additional) {
     if (additionalData instanceof Sandbox) {
       try {
         ((Sandbox)additionalData).writeExternal(additional);
       }
       catch (WriteExternalException e) {
         LOG.error(e);
       }
     }
   }

   public SdkAdditionalData loadAdditionalData(@NotNull Sdk sdk, Element additional) {
     Sandbox sandbox = new Sandbox(sdk);
     try {
       sandbox.readExternal(additional);
     }
     catch (InvalidDataException e) {
       LOG.error(e);
     }
     return sandbox;
   }

   public String getPresentableName() {
     return DevKitBundle.message("sdk.title");
   }

   @Nullable
   public static Sdk findIdeaJdk(@Nullable Sdk jdk) {
     if (jdk == null) return null;
     if (jdk.getSdkType() instanceof IdeaJdk) return jdk;
     return null;
   }

   public static SdkType getInstance() {
     return SdkType.findInstance(IdeaJdk.class);
   }

   @Override
   public boolean isRootTypeApplicable(OrderRootType type) {
     return type == OrderRootType.CLASSES ||
            type == OrderRootType.SOURCES ||
            type == JavadocOrderRootType.getInstance() ||
            type == AnnotationOrderRootType.getInstance();
   }

   public String getDefaultDocumentationUrl(final @NotNull Sdk sdk) {
     return JavaSdk.getInstance().getDefaultDocumentationUrl(sdk);
   }
 }
	/*
	* Copyright 2000-2014 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 org.jetbrains.idea.devkit.projectRoots;

	import com.intellij.openapi.application.PathManager;
	import com.intellij.openapi.diagnostic.Logger;
	import com.intellij.openapi.projectRoots.*;
	import com.intellij.openapi.projectRoots.impl.JavaDependentSdkType;
	import com.intellij.openapi.roots.AnnotationOrderRootType;
	import com.intellij.openapi.roots.JavadocOrderRootType;
	import com.intellij.openapi.roots.OrderRootType;
	import com.intellij.openapi.ui.Messages;
	import com.intellij.openapi.util.InvalidDataException;
	import com.intellij.openapi.util.SystemInfo;
	import com.intellij.openapi.util.WriteExternalException;
	import com.intellij.openapi.util.io.FileUtil;
	import com.intellij.openapi.util.io.ZipFileCache;
	import com.intellij.openapi.vfs.JarFileSystem;
	import com.intellij.openapi.vfs.VfsUtilCore;
	import com.intellij.openapi.vfs.VirtualFile;
	import com.intellij.openapi.vfs.VirtualFileManager;
	import com.intellij.util.ArrayUtil;
	import icons.DevkitIcons;
	import org.jdom.Element;
	import org.jetbrains.annotations.NonNls;
	import org.jetbrains.annotations.NotNull;
	import org.jetbrains.annotations.Nullable;
	import org.jetbrains.idea.devkit.DevKitBundle;

	import javax.swing.*;
	import java.io.DataInputStream;
	import java.io.File;
	import java.io.FileFilter;
	import java.io.IOException;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.List;
	import java.util.zip.ZipEntry;
	import java.util.zip.ZipFile;

	/**
	* @author anna
	* @since Nov 22, 2004
	*/
	public class IdeaJdk extends JavaDependentSdkType implements JavaSdkType {
	private static final Icon ADD_SDK = DevkitIcons.Add_sdk;
	private static final Icon SDK_CLOSED = DevkitIcons.Sdk_closed;

	private static final Logger LOG = Logger.getInstance("#org.jetbrains.idea.devkit.projectRoots.IdeaJdk");
	@NonNls private static final String LIB_DIR_NAME = "lib";
	@NonNls private static final String SRC_DIR_NAME = "src";
	@NonNls private static final String PLUGINS_DIR = "plugins";

	public IdeaJdk() {
	super("IDEA JDK");
	}

	public Icon getIcon() {
	return SDK_CLOSED;
	}

	@NotNull
	@Override
	public String getHelpTopic() {
	return "reference.project.structure.sdk.idea";
	}

	public Icon getIconForAddAction() {
	return ADD_SDK;
	}

	public String suggestHomePath() {
	return PathManager.getHomePath().replace(File.separatorChar, '/');
	}

	@Override
	public String adjustSelectedSdkHome(String homePath) {
	if (SystemInfo.isMac) {
	File home = new File(homePath, "Contents");
	if (home.exists()) return home.getPath();
	}
	return super.adjustSelectedSdkHome(homePath);
	}

	public boolean isValidSdkHome(String path) {
	if (isFromIDEAProject(path)) {
	return true;
	}
	File home = new File(path);
	if (!home.exists()) {
	return false;
	}
	if (getBuildNumber(path) == null \|\| getOpenApiJar(path) == null) {
	return false;
	}
	return true;
	}

	@Nullable
	private static File getOpenApiJar(String home) {
	@NonNls final String openapiJar = "openapi.jar";
	@NonNls final String platformApiJar = "platform-api.jar";
	final File libDir = new File(home, LIB_DIR_NAME);
	File f = new File(libDir, openapiJar);
	if (f.exists()) return f;
	f = new File(libDir, platformApiJar);
	if (f.exists()) return f;
	return null;
	}

	public static boolean isFromIDEAProject(String path) {
	File home = new File(path);
	File[] openapiDir = home.listFiles(new FileFilter() {
	public boolean accept(File pathname) {
	@NonNls final String name = pathname.getName();
	if (name.equals("openapi") && pathname.isDirectory()) return true; //todo
	return false;
	}
	});
	return openapiDir != null && openapiDir.length != 0;
	}

	@Nullable
	public final String getVersionString(@NotNull final Sdk sdk) {
	final Sdk internalJavaSdk = getInternalJavaSdk(sdk);
	return internalJavaSdk != null ? internalJavaSdk.getVersionString() : null;
	}

	@Nullable
	private static Sdk getInternalJavaSdk(final Sdk sdk) {
	final SdkAdditionalData data = sdk.getSdkAdditionalData();
	if (data instanceof Sandbox) {
	return ((Sandbox)data).getJavaSdk();
	}
	return null;
	}

	public String suggestSdkName(String currentSdkName, String sdkHome) {
	@NonNls final String productName;
	if (new File(sdkHome, "lib/rubymine.jar").exists()) {
	productName = "RubyMine ";
	}
	else if (new File(sdkHome, "lib/pycharm.jar").exists()) {
	productName = "PyCharm ";
	}
	else if (new File(sdkHome, "lib/webide.jar").exists()) {
	productName = "WebStorm/PhpStorm ";
	}
	else if (new File(sdkHome, "license/AppCode_license.txt").exists()) {
	productName = "AppCode ";
	}
	else if (new File(sdkHome, "license/CLion_Preview_License.txt").exists()) {
	productName = "CLion ";
	}
	else {
	productName = "IDEA ";
	}
	String buildNumber = getBuildNumber(sdkHome);
	return productName + (buildNumber != null ? buildNumber : "");
	}

	@Nullable
	public static String getBuildNumber(String ideaHome) {
	try {
	@NonNls final String buildTxt = "/build.txt";
	return FileUtil.loadFile(new File(ideaHome + buildTxt)).trim();
	}
	catch (IOException e) {
	return null;
	}
	}

	private static VirtualFile[] getIdeaLibrary(String home) {
	String plugins = home + File.separator + PLUGINS_DIR + File.separator;
	ArrayList<VirtualFile> result = new ArrayList<VirtualFile>();
	appendIdeaLibrary(home, result, "junit.jar");
	appendIdeaLibrary(plugins + "JavaEE", result, "javaee-impl.jar", "jpa-console.jar");
	appendIdeaLibrary(plugins + "PersistenceSupport", result, "persistence-impl.jar");
	appendIdeaLibrary(plugins + "DatabaseTools", result, "database-impl.jar", "jdbc-console.jar");
	appendIdeaLibrary(plugins + "css", result, "css.jar");
	appendIdeaLibrary(plugins + "uml", result, "uml-support.jar");
	appendIdeaLibrary(plugins + "Spring", result,
	"spring.jar", "spring-el.jar", "spring-jsf.jar", "spring-persistence-integration.jar");
	return VfsUtilCore.toVirtualFileArray(result);
	}

	private static void appendIdeaLibrary(final String libDirPath,
	final ArrayList<VirtualFile> result,
	@NonNls final String... forbidden) {
	Arrays.sort(forbidden);
	final String path = libDirPath + File.separator + LIB_DIR_NAME;
	final JarFileSystem jfs = JarFileSystem.getInstance();
	final File lib = new File(path);
	if (lib.isDirectory()) {
	File[] jars = lib.listFiles();
	if (jars != null) {
	for (File jar : jars) {
	@NonNls String name = jar.getName();
	if (jar.isFile() && Arrays.binarySearch(forbidden, name) < 0 && (name.endsWith(".jar") \|\| name.endsWith(".zip"))) {
	result.add(jfs.findFileByPath(jar.getPath() + JarFileSystem.JAR_SEPARATOR));
	}
	}
	}
	}
	}


	public boolean setupSdkPaths(final Sdk sdk, SdkModel sdkModel) {
	final Sandbox additionalData = (Sandbox)sdk.getSdkAdditionalData();
	if (additionalData != null) {
	additionalData.cleanupWatchedRoots();
	}

	final SdkModificator sdkModificator = sdk.getSdkModificator();

	final List<String> javaSdks = new ArrayList<String>();
	final Sdk[] sdks = sdkModel.getSdks();
	for (Sdk jdk : sdks) {
	if (isValidInternalJdk(sdk, jdk)) {
	javaSdks.add(jdk.getName());
	}
	}
	if (javaSdks.isEmpty()){
	JavaSdkVersion requiredVersion = getRequiredJdkVersion(sdk);
	if (requiredVersion != null) {
	Messages.showErrorDialog(DevKitBundle.message("no.java.sdk.for.idea.sdk.found", requiredVersion), "No Java SDK Found");
	}
	else {
	Messages.showErrorDialog(DevKitBundle.message("no.idea.sdk.version.found"), "No Java SDK Found");
	}
	return false;
	}

	final int choice = Messages
	.showChooseDialog("Select Java SDK to be used for " + DevKitBundle.message("sdk.title"),
	"Select Internal Java Platform",
	ArrayUtil.toStringArray(javaSdks), javaSdks.get(0),
	Messages.getQuestionIcon());

	if (choice != -1) {
	final String name = javaSdks.get(choice);
	final Sdk jdk = sdkModel.findSdk(name);
	LOG.assertTrue(jdk != null);
	setupSdkPaths(sdkModificator, sdk.getHomePath(), jdk);
	sdkModificator.setSdkAdditionalData(new Sandbox(getDefaultSandbox(), jdk, sdk));
	sdkModificator.setVersionString(jdk.getVersionString());
	sdkModificator.commitChanges();
	return true;
	}
	return false;
	}

	public static boolean isValidInternalJdk(Sdk ideaSdk, Sdk sdk) {
	final SdkTypeId sdkType = sdk.getSdkType();
	if (sdkType instanceof JavaSdk) {
	final JavaSdkVersion version = JavaSdk.getInstance().getVersion(sdk);
	JavaSdkVersion requiredVersion = getRequiredJdkVersion(ideaSdk);
	if (version != null && requiredVersion != null) {
	return version.isAtLeast(requiredVersion);
	}
	}
	return false;
	}

	private static int getIdeaClassFileVersion(Sdk ideaSdk) {
	try {
	File apiJar = getOpenApiJar(ideaSdk.getHomePath());
	if (apiJar != null) {
	ZipFile zipFile = ZipFileCache.acquire(apiJar.getPath());
	try {
	ZipEntry entry = zipFile.getEntry("com/intellij/psi/PsiManager.class");
	if (entry != null) {
	DataInputStream stream = new DataInputStream(zipFile.getInputStream(entry));
	try {
	if (stream.skip(6) == 6) {
	return stream.readUnsignedShort();
	}
	}
	finally {
	stream.close();
	}
	}
	}
	finally {
	ZipFileCache.release(zipFile);
	}
	}
	}
	catch (IOException ignored) { }

	return -1;
	}

	@Nullable
	private static JavaSdkVersion getRequiredJdkVersion(final Sdk ideaSdk) {
	int classFileVersion = getIdeaClassFileVersion(ideaSdk);
	switch(classFileVersion) {
	case 48: return JavaSdkVersion.JDK_1_4;
	case 49: return JavaSdkVersion.JDK_1_5;
	case 50: return JavaSdkVersion.JDK_1_6;
	case 51: return JavaSdkVersion.JDK_1_7;
	}
	return null;
	}

	public static void setupSdkPaths(final SdkModificator sdkModificator, final String sdkHome, final Sdk internalJava) {
	//roots from internal jre
	addClasses(sdkModificator, internalJava);
	addDocs(sdkModificator, internalJava);
	addSources(sdkModificator, internalJava);
	//roots for openapi and other libs
	if (!isFromIDEAProject(sdkHome)) {
	final VirtualFile[] ideaLib = getIdeaLibrary(sdkHome);
	if (ideaLib != null) {
	for (VirtualFile aIdeaLib : ideaLib) {
	sdkModificator.addRoot(aIdeaLib, OrderRootType.CLASSES);
	}
	}
	addSources(new File(sdkHome), sdkModificator);
	}
	}

	static String getDefaultSandbox() {
	@NonNls String defaultSandbox = "";
	try {
	defaultSandbox = new File(PathManager.getSystemPath()).getCanonicalPath() + File.separator + "plugins-sandbox";
	}
	catch (IOException e) {
	//can't be on running instance
	}
	return defaultSandbox;
	}

	private static void addSources(File file, SdkModificator sdkModificator) {
	final File src = new File(new File(file, LIB_DIR_NAME), SRC_DIR_NAME);
	if (!src.exists()) return;
	File[] srcs = src.listFiles(new FileFilter() {
	public boolean accept(File pathname) {
	@NonNls final String path = pathname.getPath();
	//noinspection SimplifiableIfStatement
	if (path.contains("generics")) return false;
	return path.endsWith(".jar") \|\| path.endsWith(".zip");
	}
	});
	for (int i = 0; srcs != null && i < srcs.length; i++) {
	File jarFile = srcs[i];
	if (jarFile.exists()) {
	JarFileSystem jarFileSystem = JarFileSystem.getInstance();
	String path = jarFile.getAbsolutePath().replace(File.separatorChar, '/') + JarFileSystem.JAR_SEPARATOR;
	jarFileSystem.setNoCopyJarForPath(path);
	VirtualFile vFile = jarFileSystem.findFileByPath(path);
	sdkModificator.addRoot(vFile, OrderRootType.SOURCES);
	}
	}
	}

	private static void addClasses(SdkModificator sdkModificator, final Sdk javaSdk) {
	addOrderEntries(OrderRootType.CLASSES, javaSdk, sdkModificator);
	}

	private static void addDocs(SdkModificator sdkModificator, final Sdk javaSdk) {
	if (!addOrderEntries(JavadocOrderRootType.getInstance(), javaSdk, sdkModificator) &&
	SystemInfo.isMac){
	Sdk[] jdks = ProjectJdkTable.getInstance().getAllJdks();
	for (Sdk jdk : jdks) {
	if (jdk.getSdkType() instanceof JavaSdk) {
	addOrderEntries(JavadocOrderRootType.getInstance(), jdk, sdkModificator);
	break;
	}
	}
	}
	}

	private static void addSources(SdkModificator sdkModificator, final Sdk javaSdk) {
	if (javaSdk != null) {
	if (!addOrderEntries(OrderRootType.SOURCES, javaSdk, sdkModificator)){
	if (SystemInfo.isMac) {
	Sdk[] jdks = ProjectJdkTable.getInstance().getAllJdks();
	for (Sdk jdk : jdks) {
	if (jdk.getSdkType() instanceof JavaSdk) {
	addOrderEntries(OrderRootType.SOURCES, jdk, sdkModificator);
	break;
	}
	}
	}
	else {
	final File jdkHome = new File(javaSdk.getHomePath()).getParentFile();
	@NonNls final String srcZip = "src.zip";
	final File jarFile = new File(jdkHome, srcZip);
	if (jarFile.exists()){
	JarFileSystem jarFileSystem = JarFileSystem.getInstance();
	String path = jarFile.getAbsolutePath().replace(File.separatorChar, '/') + JarFileSystem.JAR_SEPARATOR;
	jarFileSystem.setNoCopyJarForPath(path);
	sdkModificator.addRoot(jarFileSystem.findFileByPath(path), OrderRootType.SOURCES);
	}
	}
	}
	}
	}

	private static boolean addOrderEntries(OrderRootType orderRootType, Sdk sdk, SdkModificator toModificator){
	boolean wasSmthAdded = false;
	final String[] entries = sdk.getRootProvider().getUrls(orderRootType);
	for (String entry : entries) {
	VirtualFile virtualFile = VirtualFileManager.getInstance().findFileByUrl(entry);
	if (virtualFile != null) {
	toModificator.addRoot(virtualFile, orderRootType);
	wasSmthAdded = true;
	}
	}
	return wasSmthAdded;
	}

	public AdditionalDataConfigurable createAdditionalDataConfigurable(final SdkModel sdkModel, SdkModificator sdkModificator) {
	return new IdeaJdkConfigurable(sdkModel, sdkModificator);
	}

	@Nullable
	public String getBinPath(@NotNull Sdk sdk) {
	final Sdk internalJavaSdk = getInternalJavaSdk(sdk);
	return internalJavaSdk == null ? null : JavaSdk.getInstance().getBinPath(internalJavaSdk);
	}

	@Nullable
	public String getToolsPath(@NotNull Sdk sdk) {
	final Sdk jdk = getInternalJavaSdk(sdk);
	if (jdk != null && jdk.getVersionString() != null){
	return JavaSdk.getInstance().getToolsPath(jdk);
	}
	return null;
	}

	@Nullable
	public String getVMExecutablePath(@NotNull Sdk sdk) {
	final Sdk internalJavaSdk = getInternalJavaSdk(sdk);
	return internalJavaSdk == null ? null : JavaSdk.getInstance().getVMExecutablePath(internalJavaSdk);
	}

	public void saveAdditionalData(@NotNull SdkAdditionalData additionalData, @NotNull Element additional) {
	if (additionalData instanceof Sandbox) {
	try {
	((Sandbox)additionalData).writeExternal(additional);
	}
	catch (WriteExternalException e) {
	LOG.error(e);
	}
	}
	}

	public SdkAdditionalData loadAdditionalData(@NotNull Sdk sdk, Element additional) {
	Sandbox sandbox = new Sandbox(sdk);
	try {
	sandbox.readExternal(additional);
	}
	catch (InvalidDataException e) {
	LOG.error(e);
	}
	return sandbox;
	}

	public String getPresentableName() {
	return DevKitBundle.message("sdk.title");
	}

	@Nullable
	public static Sdk findIdeaJdk(@Nullable Sdk jdk) {
	if (jdk == null) return null;
	if (jdk.getSdkType() instanceof IdeaJdk) return jdk;
	return null;
	}

	public static SdkType getInstance() {
	return SdkType.findInstance(IdeaJdk.class);
	}

	@Override
	public boolean isRootTypeApplicable(OrderRootType type) {
	return type == OrderRootType.CLASSES \|\|
	type == OrderRootType.SOURCES \|\|
	type == JavadocOrderRootType.getInstance() \|\|
	type == AnnotationOrderRootType.getInstance();
	}

	public String getDefaultDocumentationUrl(final @NotNull Sdk sdk) {
	return JavaSdk.getInstance().getDefaultDocumentationUrl(sdk);
	}
	}