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EXIficient is an open source implementation of the W3C Efficient XML Interchange (EXI) format specification written in the Java programming language. The EXI format is a very compact representation for the Extensible Markup Language (XML) Information Set that is intended to simultaneously optimize performance and the utilization of computational resources.

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/*
 * Copyright (c) 2007-2018 Siemens AG
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 */

package com.siemens.ct.exi.main.helpers;

import com.siemens.ct.exi.core.EXIFactory;
import com.siemens.ct.exi.core.SchemaIdResolver;
import com.siemens.ct.exi.core.exceptions.EXIException;
import com.siemens.ct.exi.core.grammars.Grammars;
import com.siemens.ct.exi.grammars.GrammarFactory;

/**
 * 
 * This is the default implementation of an SchemaIdResolver class.
 * 
 * 
 * SchemaId is interpreted as file location
 * 
 * 
 * @see EXIFactory
 * 
 * @author [email protected]
 * @author [email protected]
 * 
 */

public class DefaultSchemaIdResolver implements SchemaIdResolver {

	// protected GrammarFactory gf;

	public DefaultSchemaIdResolver() {

	}

	protected GrammarFactory getGrammarFactory() {
		return GrammarFactory.newInstance();
		// if (gf == null) {
		// gf = GrammarFactory.newInstance();
		// }
		// return gf;
	}

	public Grammars resolveSchemaId(String schemaId) throws EXIException {
		if (schemaId == null) {
			return getGrammarFactory().createSchemaLessGrammars();
		} else if ("".equals(schemaId)) {
			return getGrammarFactory().createXSDTypesOnlyGrammars();
		} else {
			// interpret schemaId as location
			try {
				return getGrammarFactory().createGrammars(schemaId);
			} catch (Exception e) {
				throw new EXIException(this.getClass().getName()
						+ " failed to retrieve schemaId == " + schemaId, e);
			}
		}
	}

}