content: /* Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with this
   * work for additional information regarding copyright ownership.  The ASF
   * licenses this file to you 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.apache.buildr;
  
  import java.lang.reflect.Method;
  import java.lang.reflect.Field;
  import java.lang.reflect.Modifier;
  import java.io.File;
  import java.io.IOException;
  import java.net.URL;
  import java.net.URLClassLoader;
  import java.net.MalformedURLException;
  import java.util.Iterator;
  import java.util.Vector;
  
  public class JavaTestFilter {
  
    private ClassLoader _loader;
    private Vector methodAnnotations = new Vector();
    private Vector classAnnotations = new Vector();
    private Vector interfaces = new Vector();
    private Vector fieldNames = new Vector();
  
    public JavaTestFilter(String[] paths) throws IOException {
      URL[] urls = new URL[paths.length];
      for (int i = 0 ; i < paths.length ; ++i) {
        File file = new File(paths[i]).getCanonicalFile();
        if (file.exists())
          urls[i] = file.toURI().toURL();
        else
          throw new IOException("No file or directory with the name " + file);
      }
      _loader = new URLClassLoader(urls, getClass().getClassLoader());
    }
  
    public JavaTestFilter addInterfaces(String[] names) throws ClassNotFoundException {
      for (int i = names.length; i -- > 0;) {
        String name = names[i];
        interfaces.add(_loader.loadClass(name));
      }
      return this;
    }
  
    public JavaTestFilter addClassAnnotations(String[] names) throws ClassNotFoundException {
      for (int i = names.length; i -- > 0;) {
        String name = names[i];
        classAnnotations.add(_loader.loadClass(name));
      }
      return this;
    }
  
    public JavaTestFilter addMethodAnnotations(String[] names) throws ClassNotFoundException {
      for (int i = names.length; i -- > 0;) {
        String name = names[i];
        methodAnnotations.add(_loader.loadClass(name));
      }
      return this;
    }
  
    public JavaTestFilter addFields(String[] names) {
      for (int i = names.length; i -- > 0;) {
        String name = names[i];
        fieldNames.add(name);
      }
      return this;
    }
  
    private boolean isTest(Class cls) {
      if (Modifier.isAbstract(cls.getModifiers()) || !Modifier.isPublic(cls.getModifiers()))
        return false;
      if (interfaces != null) {
        for (Iterator it = interfaces.iterator(); it.hasNext(); ) {
          Class iface = (Class) it.next();
          if (iface.isAssignableFrom(cls)) { return true; }
        }
      }
      if (classAnnotations != null) {
        for (Iterator it = classAnnotations.iterator(); it.hasNext(); ) {
          Class annotation = (Class) it.next();
          if (cls.isAnnotationPresent(annotation)) { return true; }
        }
      }
      if (methodAnnotations != null) {
        Method[] methods = cls.getMethods();
        for (int j = methods.length ; j-- > 0 ;) {
          for (Iterator it = methodAnnotations.iterator(); it.hasNext(); ) {
            Class annotation = (Class) it.next();
            if (methods[j].isAnnotationPresent(annotation)) { return true; }
          }
        }
      }
      if (fieldNames != null) {
        Field[] fields = cls.getFields();
        for (int j = 0; j < fields.length; j++) {
          for (Iterator it = fieldNames.iterator(); it.hasNext(); ) {
            if (fields[j].getName().equals(it.next())) { return true; }
          }
        }
      }
      return false;
    }
  
  
    public String[] filter(String[] names) throws Throwable {
      Vector testCases = new Vector();
      for (int i = names.length ; i-- > 0 ;) {
        try {
          Class cls = _loader.loadClass(names[i]);
          if (isTest(cls)) { testCases.add(names[i]); }
        } catch (Throwable e) {
          System.err.println("JavaTestFilter: Unable to load class "+names[i]+" to determine testing ability");
          throw e;
        }
      }
      String[] result = new String[testCases.size()];
      testCases.toArray(result);
      return result;
    }
  
  }
  
  /*
   * Local Variables:
   * indent-tabs-mode: nil
   * c-basic-offset: 2
   * End:
   */
  