W3CSchemaType.java

/**
 * **********************************************************************
 *
 * <p>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
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>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.
 *
 * <p>**********************************************************************
 */
package org.odftoolkit.odfdom.type;

import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.xerces.impl.dv.InvalidDatatypeValueException;
import org.apache.xerces.impl.dv.SchemaDVFactory;
import org.apache.xerces.impl.dv.ValidatedInfo;
import org.apache.xerces.impl.dv.XSSimpleType;
import org.apache.xerces.impl.validation.ValidationState;

/**
 * This class validates string to be valid W3C schema data types. In general it takes advantage of
 * already existing underlying parser functionality and encapsulates it
 */
class W3CSchemaType {
  // validate the content by the dataType which is defined in XML schema

  static boolean isValid(String dataType, String content) {
    boolean isValid = false;
    try {
      // SchemaDVFactory / Enumeration Dataype
      XSSimpleType simpleType = SchemaDVFactory.getInstance().getBuiltInType(dataType);
      if (simpleType != null) {
        simpleType.validate(content, new ValidationState(), new ValidatedInfo());
        isValid = true; // Xerces docu is a little weak, we assume it works this way
      } else {
        throw new IllegalArgumentException("Datatype " + dataType + " does not exist!");
      }
    } catch (InvalidDatatypeValueException e) {
      isValid = false;
      Logger.getLogger(W3CSchemaType.class.getName())
          .log(Level.FINER, content + "is not of datatype " + dataType + "!", e);
    }
    return isValid;
  }

  private W3CSchemaType() {}
}