/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.hadoop.gateway.filter.rewrite.impl.form;

import java.io.IOException;
import java.io.Writer;
import java.net.URLEncoder;

public class FormWriter {

  private static final String DEFFAULT_FORM_ENCODING = "UTF-8";

  private Writer writer;
  boolean first;

  public FormWriter( Writer writer ) {
    this.writer = writer;
    this.first = true;
  }

  public void writePair( FormPair pair ) throws IOException {
    if( first ) {
      first = false;
    } else {
      writer.write( "&" );
    }
    writer.write( URLEncoder.encode( pair.getName(), DEFFAULT_FORM_ENCODING ) );
    writer.write( "=" );
    writer.write( URLEncoder.encode( pair.getValue(), DEFFAULT_FORM_ENCODING ) );
  }

}
