com.agilejava.docbkx.maven.ExpressionUtils Maven / Gradle / Ivy

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A number of base classes, providing the basic behaviour of objects / plugins transforming DocBook XML sources into some other format.

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/*
 * Copyright 2007 Wilfred Springer
 * 
 * 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.agilejava.docbkx.maven;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;

/**
 * DOCUMENT ME!
 *
 * @author $author$
 * @version $Revision$
 */
public class ExpressionUtils {
  /**
   * DOCUMENT ME!
   *
   * @param properties DOCUMENT ME!
   *
   * @return DOCUMENT ME!
   */
  public final static Map createTree(Properties properties) {
    Map map = new HashMap();
    Iterator iterator = properties.keySet().iterator();

    while (iterator.hasNext()) {
      String key = (String) iterator.next();
      splitToTree(key, properties.get(key), map);
    }

    return map;
  }

  private static void splitToTree(String key, Object object, Map map) {
    int i = key.indexOf('.');

    if (i > 0) {
      String part = key.substring(0, i);
      Map submap = (Map) map.get(part);
      submap = (submap == null) ? new HashMap() : submap;
      map.put(part, submap);
      splitToTree(key.substring(i + 1), object, submap);
    } else {
      map.put(key, object);
    }
  }
}