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Nuts'n'Bolts Utilities
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/*
 * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 David Berkman
 *
 * This file is part of the SmallMind Code Project.
 *
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 *
 * 1) The terms of GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * ...or...
 *
 * 2) The terms of the Apache License, Version 2.0.
 *
 * The SmallMind Code Project is distributed in the hope that it will
 * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License or Apache License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 *
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.nutsnbolts.spring;

import java.util.Collections;
import java.util.Map;
import java.util.Set;
import org.smallmind.nutsnbolts.property.PropertyExpander;
import org.smallmind.nutsnbolts.property.PropertyExpanderException;
import org.smallmind.nutsnbolts.util.SystemPropertyMode;
import org.springframework.beans.BeansException;
import org.springframework.util.StringValueResolver;

public class PropertyPlaceholderStringValueResolver implements StringValueResolver {

  private final PropertyExpander propertyExpander;
  private final Map propertyMap;

  public PropertyPlaceholderStringValueResolver (Map propertyMap, boolean ignoreUnresolvableProperties, SystemPropertyMode systemPropertyMode, boolean searchSystemEnvironment)
    throws BeansException {

    try {
      propertyExpander = new PropertyExpander(ignoreUnresolvableProperties, systemPropertyMode, searchSystemEnvironment);
    } catch (PropertyExpanderException propertyExpanderException) {
      throw new RuntimeBeansException(propertyExpanderException);
    }

    this.propertyMap = propertyMap;
  }

  public Set getKeySet () {

    return Collections.unmodifiableSet(propertyMap.keySet());
  }

  public String resolveStringValue (String property)
    throws BeansException {

    try {

      return propertyExpander.expand(property, propertyMap);
    } catch (PropertyExpanderException propertyExpanderException) {
      throw new RuntimeBeansException(propertyExpanderException);
    }
  }
}