/*
Copyright 2011-2016 Google Inc. All Rights Reserved.

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.google.security.zynamics.zylib.reflection;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

public class ReflectionHelpers {
  public static Object getField(final Class<?> c, final Object object, final String field)
      throws IllegalArgumentException, IllegalAccessException, SecurityException,
      NoSuchFieldException {
    final Field chap = c.getDeclaredField(field);
    chap.setAccessible(true);

    return chap.get(object);
  }

  public static Object getField(final Object object, final String field)
      throws IllegalArgumentException, IllegalAccessException, SecurityException,
      NoSuchFieldException {
    final Class<?> c = object.getClass();

    final Field chap = c.getDeclaredField(field);
    chap.setAccessible(true);

    return chap.get(object);
  }

  public static Method getMethod(final Object object, final String methodName,
      final Class<?>... arguments) throws IllegalArgumentException, SecurityException,
      NoSuchMethodException {
    final Class<?> c = object.getClass();

    final Class<?>[] parameterTypes = new Class<?>[arguments.length];

    int counter = 0;

    for (final Class<?> argument : arguments) {
      parameterTypes[counter++] = argument;
    }

    final Method method = c.getDeclaredMethod(methodName, parameterTypes);

    return method;
  }

  public static Object getMethod(final Object object, final String methodName,
      final Object... arguments) throws IllegalArgumentException, SecurityException,
      NoSuchMethodException {
    final Class<?> c = object.getClass();

    final Class<?>[] parameterTypes = new Class<?>[arguments.length];

    int counter = 0;

    for (final Object argument : arguments) {
      parameterTypes[counter++] = argument.getClass();
    }

    final Method method = c.getDeclaredMethod(methodName, parameterTypes);

    return method;
  }

  public static Object getStaticField(final Class<?> c, final String field)
      throws IllegalArgumentException, IllegalAccessException, SecurityException,
      NoSuchFieldException {
    final Field chap = c.getDeclaredField(field);
    chap.setAccessible(true);

    return chap.get(null);
  }
}
