/**
 *  ServingXML
 *  
 *  Copyright (C) 2006  Daniel Parker
 *    daniel.parker@servingxml.com 
 * 
 * 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.servingxml.components.streamsink.url; 

import java.net.URL;

import com.servingxml.app.ServiceContext;
import com.servingxml.io.streamsink.StreamSink;
import com.servingxml.io.streamsink.url.UrlSink;
import com.servingxml.components.streamsink.StreamSinkFactory;
import com.servingxml.app.Flow;
import java.nio.charset.Charset;
import com.servingxml.components.common.UrlEvaluator;
import com.servingxml.util.ServingXmlException;

public class UrlSinkFactory implements StreamSinkFactory {
  
  private final UrlEvaluator urlResolver;
  private final Charset charset;
  
  public UrlSinkFactory(UrlEvaluator urlResolver, Charset charset) {
    this.urlResolver = urlResolver;
    this.charset = charset;
  }

  public Charset getCharset() {
    return charset;
  }

  public Charset getCharset(Charset defaultCharset) {
    return charset != null ? charset : defaultCharset;
  }

  public StreamSink createStreamSink(ServiceContext context, Flow flow) {
    try {
      URL url = urlResolver.evaluateUrl(flow.getParameters(), flow.getRecord());
      return new UrlSink(url, charset);
    } catch (ServingXmlException e) {
      throw e;
    } catch (Exception e) {
      throw new ServingXmlException(e.getMessage(),e);
    }
  }
}
