content: /**
   * Copyright (c) 2017-2018, the Alpha Team.
   * All rights reserved.
   * 
   * Additional changes made by Siemens.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   * 
   * 1) Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   * 
   * 2) Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package at.ac.tuwien.kr.alpha.core.common.fixedinterpretations;
  
  import org.apache.commons.lang3.ClassUtils;
  
  import at.ac.tuwien.kr.alpha.api.programs.terms.ConstantTerm;
  
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.util.List;
  
  public class MethodPredicateInterpretation extends NonBindingPredicateInterpretation {
  	private final Method method;
  
  	public MethodPredicateInterpretation(Method method) {
  		super(method.getParameterCount());
  
  		if (!method.getReturnType().equals(boolean.class)) {
  			throw new IllegalArgumentException("method must return boolean");
  		}
  
  		this.method = method;
  	}
  
  	@Override
  	protected boolean test(List<ConstantTerm<?>> terms) {
  		final Class<?>[] parameterTypes = method.getParameterTypes();
  		final Object[] arguments = new Object[terms.size()];
  
  		for (int i = 0; i < arguments.length; i++) {
  			arguments[i] = terms.get(i).getObject();
  
  			final Class<?> expected = parameterTypes[i];
  			final Class<?> actual = arguments[i].getClass();
  
  			if (expected.isAssignableFrom(actual)) {
  				continue;
  			}
  
  			if (expected.isPrimitive() && ClassUtils.primitiveToWrapper(expected).isAssignableFrom(actual)) {
  				continue;
  			}
  
  			throw new IllegalArgumentException(
  				"Parameter type mismatch at position " + i + ". Expected " + expected + " but got " +
  					actual + "."
  			);
  		}
  
  		try {
  			return (boolean) method.invoke(null, arguments);
  		} catch (IllegalAccessException | InvocationTargetException e) {
  			throw new RuntimeException(e);
  		}
  	}
  }
  