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Library for validating XML documents with Schematron

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/**
 * Copyright (C) 2014 phloc systems
 * http://www.phloc.com
 * office[at]phloc[dot]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.phloc.schematron.xslt;

import javax.annotation.Nullable;
import javax.xml.transform.Templates;

import org.w3c.dom.Document;

/**
 * Interface for a factory creating Schematron validators from XSLT. Sometimes
 * the pre-built XSLTs are already available, and sometimes they need to be
 * built from the underlying Schematron file.
 * 
 * @author PEPPOL.AT, BRZ, Philip Helger
 */
public interface ISchematronXSLTProvider
{
  /**
   * @return true if the Schematron was successfully interpreted,
   *         false otherwise.
   */
  boolean isValidSchematron ();

  /**
   * @return The produced XSLT document from the Schematron document or
   *         null if preprocessing failed.
   * @see #isValidSchematron()
   */
  @Nullable
  Document getXSLTDocument ();

  /**
   * @return The precompiled XSLT template to be used.
   */
  @Nullable
  Templates getXSLTTemplates ();
}