/*
 * Copyright 2008 Federal Chancellery Austria and
 * Graz University of Technology
 *
 * 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 at.gv.egiz.bku.local.stal;

import at.gv.egiz.bku.smccstal.SecureViewer;
import java.util.Collections;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import at.gv.egiz.bku.smccstal.SignRequestHandler;
import at.gv.egiz.stal.HashDataInput;
import at.gv.egiz.stal.STALRequest;
import at.gv.egiz.stal.STALResponse;
import at.gv.egiz.stal.SignRequest;
import at.gv.egiz.stal.impl.ByteArrayHashDataInput;
import at.gv.egiz.stal.signedinfo.ReferenceType;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;

/**
 * 
 * @author clemens
 */
public class LocalSignRequestHandler extends SignRequestHandler {
//        implements SecureViewer {

  private static final Log log = LogFactory.getLog(LocalSignRequestHandler.class);

  protected LocalSecureViewer secureViewer;

  public LocalSignRequestHandler(LocalSecureViewer secureViewer) {
    super(secureViewer);
  }


  /**
   * If the request is a SIGN request, it contains a list of DataObjectHashDataInput 
   * providing the pre-digested input stream (that can be obtained repeatedly) if 
   * reference caching is enabled (or null otherwise).
   * @param request
   * @return
   */
  @SuppressWarnings("unchecked")
  @Override
  public STALResponse handleRequest(STALRequest request) 
          throws InterruptedException {
    
    if (request instanceof SignRequest) {
      SignRequest signReq = (SignRequest) request;
      secureViewer.setDataToBeSigned(signReq.getHashDataInput());
    }
    return super.handleRequest(request);
  }
}