com.rapiddweller.common.bean.PropertyGraphAccessor Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of rd-lib-common Show documentation

'rapiddweller Common' is an open source Java library forked from Databene Commons by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

There is a newer version: 2.0.1-jdk-11

Show newest version

/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * 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.rapiddweller.common.bean;

import com.rapiddweller.common.BeanUtil;
import com.rapiddweller.common.StringUtil;
import com.rapiddweller.common.accessor.TypedAccessor;
import com.rapiddweller.common.accessor.TypedAccessorChain;

/**
 * Accesses JavaBean object graphs.
 * Created: 21.07.2007 10:18:17
 *
 * @author Volker Bergmann
 */
@SuppressWarnings("rawtypes")
public class PropertyGraphAccessor extends TypedAccessorChain implements PropertyAccessor {

  private final String propertyName;

  /**
   * Instantiates a new Property graph accessor.
   *
   * @param beanClass    the bean class
   * @param propertyName the property name
   * @param strict       the strict
   */
  public PropertyGraphAccessor(Class beanClass, String propertyName, boolean strict) {
    super(createSubAccessors(beanClass, propertyName, strict));
    this.propertyName = propertyName;
  }

  @Override
  public String getPropertyName() {
    return propertyName;
  }


  // static utility methods ------------------------------------------------------------------------------------------

  /**
   * Gets property graph.
   *
   * @param path the path
   * @param bean the bean
   * @return the property graph
   */
  public static Object getPropertyGraph(String path, Object bean) {
    String[] tokens = StringUtil.splitOnFirstSeparator(path, '.');
    Object tmp = BeanUtil.getPropertyValue(bean, tokens[0]);
    if (tokens[1] != null && tmp != null) {
      return getPropertyGraph(tokens[1], tmp);
    } else {
      return tmp;
    }
  }

  private static TypedAccessor[] createSubAccessors(Class beanClass, String propertyName, boolean strict) {
    String[] nodeNames = StringUtil.tokenize(propertyName, '.');
    PropertyAccessor[] nodes = new PropertyAccessor[nodeNames.length];
    Class intermediateClass = beanClass;
    for (int i = 0; i < nodeNames.length; i++) {
      PropertyAccessor node = PropertyAccessorFactory.getAccessor(intermediateClass, nodeNames[i], strict);
      nodes[i] = node;
      if (intermediateClass != null) {
        intermediateClass = node.getValueType();
      }
    }
    return nodes;
  }

}