Check a xml file against a schema. - Android XML

Android examples for XML:XML Schema

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Description

Check a xml file against a schema.

Demo Code

/*//  ww  w .j av a  2s.c  o m
 * Copyright 2012 University of Denver
 * Author Chet Rebman
 * 
 * This file is part of FedoraApp.
 * 
 * FedoraApp is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * FedoraApp is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with FedoraApp.  If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import java.io.File;
import java.net.URL;
import java.util.HashMap;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;

public class Main {
    /**
     * Check a xml file against a schema.
     * 
     * @param fileToCheck
     * @param schemURL
     * @throws Exception
     */
    static public void schemaCheck(File fileToCheck, URL schemURL)
            throws Exception {

        final String W3C_SCHEMA_SPEC = "http://www.w3.org/2001/XMLSchema";
        HashMap<String, Schema> MetsSchema = null;

        if (MetsSchema == null) {
            MetsSchema = new HashMap();
        }

        if (MetsSchema.get(schemURL.toString()) == null) {
            // 1. Lookup a factory for the W3C XML Schema language
            SchemaFactory factory = SchemaFactory
                    .newInstance(W3C_SCHEMA_SPEC);

            // 2. Compile the schema. 
            MetsSchema
                    .put(schemURL.toString(), factory.newSchema(schemURL));
        }

        // 3. Get a validator from the schema.
        Validator validator = MetsSchema.get(schemURL.toString())
                .newValidator();

        // 4. Parse the document you want to check.
        Source source = new StreamSource(fileToCheck);

        // 5. Check the document        
        validator.validate(source);
    }
}

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