org.apache.xerces.jaxp.validation.XMLSchemaFactory Maven / Gradle / Ivy

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/*
 * 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
 * 
 *      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.xerces.jaxp.validation;

import javax.xml.XMLConstants;
import javax.xml.validation.SchemaFactory;

import org.apache.xerces.impl.Constants;

/**
 * {@link SchemaFactory} for XML Schema.
 *
 * @author Kohsuke Kawaguchi ([email protected])
 * @version $Id: XMLSchemaFactory.java 727364 2008-12-17 12:54:58Z mrglavas $
 */
public final class XMLSchemaFactory extends BaseSchemaFactory {

    public XMLSchemaFactory() {
        super(Constants.W3C_XML_SCHEMA10_NS_URI);
    }
    
    /**
     * Is specified schema supported by this SchemaFactory?
     *
     * @param schemaLanguage Specifies the schema language which the returned SchemaFactory will understand.
     *    schemaLanguage must specify a valid schema language.
     *
     * @return true if SchemaFactory supports schemaLanguage, else false.
     *
     * @throws NullPointerException If schemaLanguage is null.
     * @throws IllegalArgumentException If schemaLanguage.length() == 0
     *   or schemaLanguage does not specify a valid schema language.
     */
    public boolean isSchemaLanguageSupported(String schemaLanguage) {
        if (schemaLanguage == null) {
            throw new NullPointerException(JAXPValidationMessageFormatter.formatMessage(getLocale(), 
                    "SchemaLanguageNull", null));
        }
        if (schemaLanguage.length() == 0) {
            throw new IllegalArgumentException(JAXPValidationMessageFormatter.formatMessage(getLocale(), 
                    "SchemaLanguageLengthZero", null));
        }
        // only W3C XML Schema 1.0 is supported
        return schemaLanguage.equals(XMLConstants.W3C_XML_SCHEMA_NS_URI) || 
            schemaLanguage.equals(Constants.W3C_XML_SCHEMA10_NS_URI);
    }

} // XMLSchemaFactory