SetterFactory.java

/*
 * Copyright (c) 2009-present the original author or authors.
 *
 * 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.planet57.gshell.util.setter;

import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collection;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * Creates {@link Setter} instances.
 *
 * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
 * @since 2.0
 */
public class SetterFactory
{
  public static Setter create(final AnnotatedElement element, final Object bean) {
    checkNotNull(element);
    checkNotNull(bean);

    if (element instanceof Field) {
      Field field = (Field) element;

      if (Collection.class.isAssignableFrom(field.getType())) {
        return new CollectionFieldSetter(bean, field);
      }
      else {
        return new FieldSetter(field, bean);
      }
    }
    else if (element instanceof Method) {
      Method method = (Method) element;

      return new MethodSetter(method, bean);
    }
    else {
      throw new Error();
    }
  }
}