package at.gv.egovernment.moa.id.auth.builder;

import java.io.IOException;

import at.gv.egovernment.moa.id.BuildException;
import at.gv.egovernment.moa.util.FileUtils;

/**
 * Builder for the <code>&lt;VerifyXMLSignatureRequest&gt;</code> structure
 * used for presenting certificate information in the secure viewer of the security layer implementation.
 * 
 * @author Paul Ivancsics
 * @version $Id$
 */
public class CertInfoVerifyXMLSignatureRequestBuilder extends Builder {
  
  /** special tag in the VerifyXMLRequest template to be substituted for a <code>&lt;dsig:Signature&gt;</code> */
  private static final String SIGNATURE_TAG = "<dsig:Signature/>";

  /**
   * Constructor
   */
  public CertInfoVerifyXMLSignatureRequestBuilder() {
    super();
  }
  /**
   * Builds the <code>&lt;VerifyXMLSignatureRequest&gt;</code> structure.
   * @return the XML structure
   * @throws BuildException
   */
  public String build() throws BuildException {
    String resCertInfoRequest = "resources/xmldata/CertInfoVerifyXMLSignatureRequest.xml";
    String resDsigSignature = "resources/xmldata/CertInfoDsigSignature.xml";
    String certInfoRequest;
    try {
      certInfoRequest = FileUtils.readResource(resCertInfoRequest, "UTF-8");
    }
    catch (IOException ex) {
      throw new BuildException("auth.04", new Object[] {resCertInfoRequest, ex.toString()});
    }
    try {
      String dsigSignature = FileUtils.readResource(resDsigSignature, "UTF-8");
      certInfoRequest = replaceTag(certInfoRequest, SIGNATURE_TAG, dsigSignature);
      return certInfoRequest;
    }
    catch (IOException ex) {
      throw new BuildException("auth.04", new Object[] {resDsigSignature, ex.toString()});
    }
  }

}