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A packaging of the IntelliJ Community Edition compiler-openapi library. This is release number 1 of trunk branch 142.
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/*
 * 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 com.intellij.openapi.compiler.ex;

import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.compiler.CompilerPaths;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.progress.ProgressManager;
import com.intellij.openapi.roots.CompilerModuleExtension;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.openapi.vfs.VirtualFileManager;
import com.intellij.util.ArrayUtil;
import com.intellij.util.StringBuilderSpinAllocator;
import com.intellij.util.containers.OrderedSet;

import java.io.File;
import java.util.Collection;
import java.util.Set;

public class CompilerPathsEx extends CompilerPaths {

  public static class FileVisitor {
    protected void accept(final VirtualFile file, final String fileRoot, final String filePath) {
      if (file.isDirectory()) {
        acceptDirectory(file, fileRoot, filePath);
      }
      else {
        acceptFile(file, fileRoot, filePath);
      }
    }

    protected void acceptFile(VirtualFile file, String fileRoot, String filePath) {
    }

    protected void acceptDirectory(final VirtualFile file, final String fileRoot, final String filePath) {
      ProgressManager.checkCanceled();
      final VirtualFile[] children = file.getChildren();
      for (final VirtualFile child : children) {
        final String name = child.getName();
        final String _filePath;
        final StringBuilder buf = StringBuilderSpinAllocator.alloc();
        try {
          buf.append(filePath).append("/").append(name);
          _filePath = buf.toString();
        }
        finally {
          StringBuilderSpinAllocator.dispose(buf);
        }
        accept(child, fileRoot, _filePath);
      }
    }
  }

  public static void visitFiles(final Collection directories, final FileVisitor visitor) {
    for (final VirtualFile outputDir : directories) {
      ApplicationManager.getApplication().runReadAction(new Runnable() {
        public void run() {
          final String path = outputDir.getPath();
          visitor.accept(outputDir, path, path);
        }
      });
    }
  }

  public static String[] getOutputPaths(Module[] modules) {
    final Set outputPaths = new OrderedSet();
    for (Module module : modules) {
      final CompilerModuleExtension compilerModuleExtension = !module.isDisposed()? CompilerModuleExtension.getInstance(module) : null;
      if (compilerModuleExtension == null) {
        continue;
      }
      String outputPathUrl = compilerModuleExtension.getCompilerOutputUrl();
      if (outputPathUrl != null) {
        outputPaths.add(VirtualFileManager.extractPath(outputPathUrl).replace('/', File.separatorChar));
      }

      String outputPathForTestsUrl = compilerModuleExtension.getCompilerOutputUrlForTests();
      if (outputPathForTestsUrl != null) {
        outputPaths.add(VirtualFileManager.extractPath(outputPathForTestsUrl).replace('/', File.separatorChar));
      }
    }
    return ArrayUtil.toStringArray(outputPaths);
  }
}