/*
    *  Copyright 2012 Chris Pheby
    *
    *  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.jadira.scanner.classpath.types;
  
  import java.lang.reflect.Method;
  import java.util.List;
  
  import javassist.bytecode.AccessFlag;
  import javassist.bytecode.MethodInfo;
  
  import org.apache.commons.lang3.builder.EqualsBuilder;
  import org.apache.commons.lang3.builder.HashCodeBuilder;
  import org.jadira.scanner.classpath.ClasspathResolver;
  import org.jadira.scanner.classpath.visitor.IntrospectionVisitor;
  import org.jadira.scanner.core.exception.ClasspathAccessException;
  
  public class JMethod extends JOperation {
  
      protected JMethod(MethodInfo methodInfo, JType enclosingType, ClasspathResolver resolver) {
          super(methodInfo, enclosingType, resolver);
      }
  
      public static JMethod getJMethod(MethodInfo methodInfo, JType enclosingType, ClasspathResolver resolver) {
          return new JMethod(methodInfo, enclosingType, resolver);
      }
      
      @Override
      public Method getActualMethod() throws ClasspathAccessException {
  
          List<JParameter> params = getParameters();
          Class<?>[] paramClasses = new Class<?>[params.size()];
          for (int i = 0; i < params.size(); i++) {
              paramClasses[i] = params.get(i).getType().getActualClass();
          }
  
          try {
              return getEnclosingType().getActualClass().getDeclaredMethod(getName(), paramClasses);
          } catch (SecurityException e) {
              throw new ClasspathAccessException("Could not access class: " + e.getMessage(), e);
          } catch (NoSuchMethodException e) {
              throw new ClasspathAccessException("Could not find method: " + e.getMessage(), e);
          }
      }
  
      public String getModifier() {
          return isPrivate() ? "private" :
                 isProtected() ? "protected" :
                 isPublic() ? "public" : "";
      }
      
      public boolean isPublic() {
          return AccessFlag.isPublic(getMethodInfo().getAccessFlags());
      }
      
      public boolean isProtected() {
          return AccessFlag.isProtected(getMethodInfo().getAccessFlags());
      }
       
      public boolean isPrivate() {
          return AccessFlag.isPrivate(getMethodInfo().getAccessFlags());
      }
      
      @Override
      public void acceptVisitor(IntrospectionVisitor visitor) throws ClasspathAccessException {
          visitor.visit(this);
  
          for (JParameter next : getParameters()) {
              next.acceptVisitor(visitor);
          }
          for (JAnnotation<?> next : getAnnotations()) {
              next.acceptVisitor(visitor);
          }
      }
      
      @Override
  	public boolean equals(Object obj) {
  		if (obj == null) {
  			return false;
  		}
  		if (obj == this) {
  			return true;
  		}
  		if (obj.getClass() != getClass()) {
  			return false;
  		}
  		// JMethod rhs = (JMethod) obj;
 		return new EqualsBuilder()
 			 	.appendSuper(super.equals(obj))
 				.isEquals();
 	}
 
     @Override
 	public int hashCode() {
 		return new HashCodeBuilder(11, 47).append(super.hashCode())
 				.toHashCode();
 	}
 }