/*
 * 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 xs;

import org.apache.xerces.xs.XSConstants;
import org.apache.xerces.xs.XSImplementation;
import org.apache.xerces.xs.XSLoader;
import org.apache.xerces.xs.XSModel;
import org.apache.xerces.xs.XSNamedMap;
import org.apache.xerces.xs.XSObject;
import org.w3c.dom.DOMConfiguration;
import org.w3c.dom.DOMError;
import org.w3c.dom.DOMErrorHandler;
import org.w3c.dom.bootstrap.DOMImplementationRegistry;

/**
 * This sample program illustrates how to use load XML Schemas and 
 * use XML Schema API (org.apache.xerces.xs) to navigate XML Schema components.
 *
 * @author Elena Litani, IBM
 * @version $Id$
 */
public class QueryXS implements DOMErrorHandler {

    public static void main(String[] argv) {

        if (argv.length == 0) {
            printUsage();
            System.exit(1);
        }

        try {
            // get DOM Implementation using DOM Registry
            // System.setProperty(
            //    DOMImplementationRegistry.PROPERTY,
            //    "org.apache.xerces.dom.DOMXSImplementationSourceImpl");
            DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance();

            XSImplementation impl = (XSImplementation) registry.getDOMImplementation("XS-Loader");

            XSLoader schemaLoader = impl.createXSLoader(null);

            DOMConfiguration config = schemaLoader.getConfig();

            // create Error Handler
            DOMErrorHandler errorHandler = new QueryXS();

            // set error handler
            config.setParameter("error-handler", errorHandler);

            // set validation feature
            config.setParameter("validate", Boolean.TRUE);

            // parse document
            System.out.println("Parsing " + argv[0] + "...");
            XSModel model = schemaLoader.loadURI(argv[0]);
            if (model != null) {
            	// element declarations
                XSNamedMap map = model.getComponents(XSConstants.ELEMENT_DECLARATION);
                if (map.getLength() != 0) {
					System.out.println("*************************************************");
					System.out.println("* Global element declarations: {namespace} name ");
					System.out.println("*************************************************");
                    for (int i = 0; i < map.getLength(); i++) {
                        XSObject item = map.item(i);
                        System.out.println("{" + item.getNamespace() + "}" + item.getName());
                    }
                }
                // attribute declarations
                map = model.getComponents(XSConstants.ATTRIBUTE_DECLARATION);
                if (map.getLength() != 0) {
					System.out.println("*************************************************");
                    System.out.println("* Global attribute declarations: {namespace} name");
					System.out.println("*************************************************");
                    for (int i = 0; i < map.getLength(); i++) {
                        XSObject item = map.item(i);
                        System.out.println("{" + item.getNamespace() + "}" + item.getName());
                    }
                }
				// notation declarations
				map = model.getComponents(XSConstants.TYPE_DEFINITION);
				if (map.getLength() != 0) {
					System.out.println("*************************************************");
					System.out.println("* Global type declarations: {namespace} name");
					System.out.println("*************************************************");
					for (int i = 0; i < map.getLength(); i++) {
						XSObject item = map.item(i);
						System.out.println("{" + item.getNamespace() + "}" + item.getName());
					}
				}
                
				// notation declarations
				map = model.getComponents(XSConstants.NOTATION_DECLARATION);
				if (map.getLength() != 0) {
					System.out.println("*************************************************");
					System.out.println("* Global notation declarations: {namespace} name");
					System.out.println("*************************************************");
					for (int i = 0; i < map.getLength(); i++) {
						XSObject item = map.item(i);
						System.out.println("{" + item.getNamespace() + "}" + item.getName());
					}
				}

            }

        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    private static void printUsage() {
        
        System.err.println("usage: java dom.QueryXS uri ...");
        System.err.println();

    } // printUsage()


    public boolean handleError(DOMError error){
        short severity = error.getSeverity();
        if (severity == DOMError.SEVERITY_ERROR) {
            System.out.println("[xs-error]: "+error.getMessage());
        }

        if (severity == DOMError.SEVERITY_WARNING) {
            System.out.println("[xs-warning]: "+error.getMessage());
        }
        return true;

    }

}