/**
    * Copyright 2010-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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 org.kuali.common.util.spring.convert.support;
  
  import static org.kuali.common.util.Encodings.UTF8;
  import static org.kuali.common.util.base.Exceptions.illegalArgument;
  import static org.kuali.common.util.base.Precondition.checkNotBlank;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.util.Properties;
  
  import org.springframework.core.convert.converter.Converter;
  
  public final class PropertiesToXmlStringConverter implements Converter<Properties, String> {
  
  	public PropertiesToXmlStringConverter() {
  		this(UTF8);
  	}
  
  	public PropertiesToXmlStringConverter(String encoding) {
  		this.encoding = checkNotBlank(encoding, "encoding");
  	}
  
  	private final String encoding;
  
  	@Override
  	public String convert(Properties props) {
  		try {
  			ByteArrayOutputStream out = new ByteArrayOutputStream();
  			props.storeToXML(out, null, encoding);
  			return out.toString(encoding);
  		} catch (IOException e) {
  			throw illegalArgument(e, "unexpected io error converting properties object into an xml string - encoding=[%s]", encoding);
  		}
  	}
  
  	public String getEncoding() {
  		return encoding;
  	}
  }