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'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.

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/*
 * 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.accessor;

import com.rapiddweller.common.Accessor;

/**
 * Accesses object graphs by splitting a path names into tokens by a dot separator('.').
 * Created: 12.06.2007 18:29:19
 *
 * @author Volker Bergmann
 */
@SuppressWarnings({"unchecked", "rawtypes"})
public class GraphAccessor implements Accessor {

  private final Accessor realAccessor;

  /**
   * Instantiates a new Graph accessor.
   *
   * @param path the path
   */
  public GraphAccessor(String path) {
    int separatorIndex = path.lastIndexOf('.');
    if (separatorIndex < 0) {
      realAccessor = new FeatureAccessor(path);
    } else {
      realAccessor = new FetchingAccessor(
          new GraphAccessor(path.substring(0, separatorIndex)),
          new FeatureAccessor(path.substring(separatorIndex + 1))
      );
    }
  }


  // Accessor interface implementation -------------------------------------------------------------------------------

  @Override
  public Object getValue(Object o) {
    return realAccessor.getValue(o);
  }


  // java.lang.Object overrides --------------------------------------------------------------------------------------

  @Override
  public String toString() {
    return getClass().getSimpleName() + '[' + realAccessor + ']';
  }


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

  /**
   * Gets value.
   *
   * @param path the path
   * @param o    the o
   * @return the value
   */
  public static Object getValue(String path, Object o) {
    return new GraphAccessor(path).getValue(o);
  }

}