001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.component.validator.jing;
018    
019    import java.io.IOException;
020    import java.io.InputStream;
021    
022    import javax.xml.XMLConstants;
023    import javax.xml.transform.Source;
024    import javax.xml.transform.sax.SAXSource;
025    
026    import org.xml.sax.InputSource;
027    import org.xml.sax.SAXException;
028    import org.xml.sax.XMLReader;
029    
030    import com.thaiopensource.relaxng.SchemaFactory;
031    import com.thaiopensource.util.PropertyMap;
032    import com.thaiopensource.util.PropertyMapBuilder;
033    import com.thaiopensource.validate.IncorrectSchemaException;
034    import com.thaiopensource.validate.Schema;
035    import com.thaiopensource.validate.ValidateProperty;
036    import com.thaiopensource.validate.Validator;
037    import com.thaiopensource.xml.sax.Jaxp11XMLReaderCreator;
038    
039    import org.apache.camel.Exchange;
040    import org.apache.camel.Message;
041    import org.apache.camel.Processor;
042    import org.apache.camel.processor.validation.DefaultValidationErrorHandler;
043    import org.apache.camel.util.ExchangeHelper;
044    import org.apache.commons.logging.Log;
045    import org.apache.commons.logging.LogFactory;
046    
047    import org.springframework.core.io.Resource;
048    
049    /**
050     * A validator which uses the <a
051     * href="http://www.thaiopensource.com/relaxng/jing.html">Jing</a> library to
052     * validate XML against RelaxNG
053     * 
054     * @version $Revision: 1.1 $
055     */
056    public class JingValidator implements Processor {
057        private static final transient Log LOG = LogFactory.getLog(JingValidator.class);
058        private Schema schema;
059        private SchemaFactory schemaFactory;
060        private String schemaNamespace = XMLConstants.RELAXNG_NS_URI;
061        private Resource schemaResource;
062        private InputSource inputSource;
063        private boolean compactSyntax;
064    
065        public void process(Exchange exchange) throws Exception {
066            Jaxp11XMLReaderCreator xmlCreator = new Jaxp11XMLReaderCreator();
067            DefaultValidationErrorHandler errorHandler = new DefaultValidationErrorHandler();
068    
069            PropertyMapBuilder mapBuilder = new PropertyMapBuilder();
070            mapBuilder.put(ValidateProperty.XML_READER_CREATOR, xmlCreator);
071            mapBuilder.put(ValidateProperty.ERROR_HANDLER, errorHandler);
072            PropertyMap propertyMap = mapBuilder.toPropertyMap();
073    
074            Validator validator = getSchema().createValidator(propertyMap);
075    
076            Message in = exchange.getIn();
077            SAXSource saxSource = in.getBody(SAXSource.class);
078            if (saxSource == null) {
079                Source source = ExchangeHelper.getMandatoryInBody(exchange, Source.class);
080                saxSource = ExchangeHelper.convertToMandatoryType(exchange, SAXSource.class, source);
081            }
082            InputSource bodyInput = saxSource.getInputSource();
083    
084            // now lets parse the body using the validator
085            XMLReader reader = xmlCreator.createXMLReader();
086            reader.setContentHandler(validator.getContentHandler());
087            reader.setDTDHandler(validator.getDTDHandler());
088            reader.setErrorHandler(errorHandler);
089            reader.parse(bodyInput);
090    
091            errorHandler.handleErrors(exchange, schema);
092        }
093    
094        // Properties
095        // -------------------------------------------------------------------------
096    
097        public Schema getSchema() throws IOException, IncorrectSchemaException, SAXException {
098            if (schema == null) {
099                SchemaFactory factory = getSchemaFactory();
100                schema = factory.createSchema(getInputSource());
101            }
102            return schema;
103        }
104    
105        public void setSchema(Schema schema) {
106            this.schema = schema;
107        }
108    
109        public InputSource getInputSource() throws IOException {
110            if (inputSource == null) {
111                Resource resource = getSchemaResource();
112                if (resource == null) {
113                    throw new IllegalArgumentException("No schemaResource or inputSource specified");
114                } else {
115                    InputStream inputStream = resource.getInputStream();
116                    if (inputStream == null) {
117                        throw new IllegalArgumentException("No inputStream available for: " + resource);
118                    }
119                    inputSource = new InputSource(inputStream);
120                }
121            }
122            return inputSource;
123        }
124    
125        public void setInputSource(InputSource inputSource) {
126            this.inputSource = inputSource;
127        }
128    
129        public SchemaFactory getSchemaFactory() {
130            if (schemaFactory == null) {
131                schemaFactory = new SchemaFactory();
132                schemaFactory.setCompactSyntax(compactSyntax);
133                schemaFactory.setXMLReaderCreator(new Jaxp11XMLReaderCreator());
134            }
135            return schemaFactory;
136        }
137    
138        public void setSchemaFactory(SchemaFactory schemaFactory) {
139            this.schemaFactory = schemaFactory;
140        }
141    
142        public Resource getSchemaResource() {
143            return schemaResource;
144        }
145    
146        public void setSchemaResource(Resource schemaResource) {
147            this.schemaResource = schemaResource;
148        }
149    
150        public String getSchemaNamespace() {
151            return schemaNamespace;
152        }
153    
154        public void setSchemaNamespace(String schemaNamespace) {
155            this.schemaNamespace = schemaNamespace;
156        }
157    
158        public boolean isCompactSyntax() {
159            return compactSyntax;
160        }
161    
162        public void setCompactSyntax(boolean compactSyntax) {
163            this.compactSyntax = compactSyntax;
164        }
165    }