/*
 * Copyright 2015 Werner Guttmann
 *
 * 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.castor.xmlctf.compiler;

import java.io.File;

/**
 * A factory for obtaining the correct {@link Compiler} instance, based on the version of the JVM
 * executing the XMLCTF tests.
 */
public class CompilerFactory {

  private static final String JAVA_SPECIFICATION_VERSION = "java.specification.version";

  /**
   * Factory method for obtaining a {@link Compiler} instance.
   * 
   * @param directory The source directory holding compilation units.
   * @return A {@link Compiler} instance
   */
  public static Compiler createInstance(File directory) {
    float javaVersion = Float.parseFloat(System.getProperty(JAVA_SPECIFICATION_VERSION));

    if (javaVersion >= 1.6) {
      return new OracleJavaCompiler(directory);
    }
    return new SunJavaCompiler(directory);
  }

}
