/*
 * Copyright 1999-2004 The Apache Software Foundation.
 *
 *  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 org.apache.xml.security.utils.resolver.implementations;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import org.apache.xml.security.signature.XMLSignatureInput;
import org.apache.xml.security.utils.resolver.ResourceResolverSpi;
import org.w3c.dom.Attr;

/**
 *
 * @author $Author: mullan $
 */

public class ResolverAnonymous extends ResourceResolverSpi {

   private XMLSignatureInput _input = null;

   /**
    * @param filename
     * @throws FileNotFoundException
     * @throws IOException
     */
   public ResolverAnonymous(String filename) throws FileNotFoundException, IOException {
      this._input = new XMLSignatureInput(new FileInputStream(filename));
   }

   /**
    * @param is
     */
   public ResolverAnonymous(InputStream is) {
      this._input = new XMLSignatureInput(is);
   }

   /** @inheritDoc */
   public XMLSignatureInput engineResolve(Attr uri, String BaseURI) {
      return this._input;
   }

   /**    
    * @inheritDoc
    */
   public boolean engineCanResolve(Attr uri, String BaseURI) {
      if (uri == null) {
         return true;
      }
      return false;
   }

   /** @inheritDoc */
   public String[] engineGetPropertyKeys() {
      return new String[0];
   }
}
