PathUtilEx.java

/*
 * Copyright 2000-2009 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.napile.idea.thermit.config.execution;

import static com.intellij.util.containers.ContainerUtil.map;
import static com.intellij.util.containers.ContainerUtil.skipNulls;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.Nullable;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.module.ModuleManager;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.projectRoots.Sdk;
import com.intellij.openapi.roots.ModuleRootManager;
import com.intellij.openapi.roots.ProjectRootManager;
import com.intellij.rt.compiler.JavacRunner;
import com.intellij.util.Function;
import com.intellij.util.PathUtil;
import com.intellij.util.PathsList;
import com.intellij.util.containers.ComparatorUtil;
import com.intellij.util.containers.Convertor;

public class PathUtilEx
{
	@NonNls
	private static final String IDEA_PREPEND_RTJAR = "idea.prepend.rtjar";

	private static final Function<Module, Sdk> MODULE_JDK = new Function<Module, Sdk>()
	{
		@Nullable
		public Sdk fun(Module module)
		{
			return ModuleRootManager.getInstance(module).getSdk();
		}
	};
	private static final Convertor<Sdk, String> SDK_VERSION = new Convertor<Sdk, String>()
	{
		public String convert(Sdk sdk)
		{
			return sdk.getVersionString();
		}
	};

	private PathUtilEx()
	{
	}

	public static void addRtJar(PathsList pathsList)
	{
		final String ideaRtJarPath = getIdeaRtJarPath();
		if(Boolean.getBoolean(IDEA_PREPEND_RTJAR))
		{
			pathsList.addFirst(ideaRtJarPath);
		}
		else
		{
			pathsList.addTail(ideaRtJarPath);
		}
	}

	public static String getIdeaRtJarPath()
	{
		final Class aClass = JavacRunner.class;
		return PathUtil.getJarPathForClass(aClass);
	}

	public static Sdk getAnyJdk(Project project)
	{
		return chooseJdk(project, Arrays.asList(ModuleManager.getInstance(project).getModules()));
	}

	public static Sdk chooseJdk(Project project, Collection<Module> modules)
	{
		Sdk projectSdk = ProjectRootManager.getInstance(project).getProjectSdk();
		if(projectSdk != null)
		{
			return projectSdk;
		}
		return chooseJdk(modules);
	}

	public static Sdk chooseJdk(Collection<Module> modules)
	{
		List<Sdk> sdks = skipNulls(map(skipNulls(modules), MODULE_JDK));
		if(sdks.isEmpty())
		{
			return null;
		}
		Collections.sort(sdks, ComparatorUtil.compareBy(SDK_VERSION, String.CASE_INSENSITIVE_ORDER));
		return sdks.get(sdks.size() - 1);
	}
}