85 lines
2.8 KiB
Java
85 lines
2.8 KiB
Java
package eu.dnetlib.is.util;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.StringReader;
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import java.nio.charset.StandardCharsets;
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import javax.xml.XMLConstants;
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import javax.xml.transform.stream.StreamSource;
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import javax.xml.validation.Schema;
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import javax.xml.validation.SchemaFactory;
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import javax.xml.validation.Validator;
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import org.apache.commons.io.IOUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.http.MediaType;
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import org.springframework.stereotype.Component;
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import org.xml.sax.SAXException;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import eu.dnetlib.is.resource.model.ResourceType;
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import eu.dnetlib.is.resource.repository.ResourceTypeRepository;
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@Component
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public class ResourceValidator {
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private final Log log = LogFactory.getLog(ResourceValidator.class);
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@Autowired
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private ResourceTypeRepository resourceTypeRepository;
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public void validate(final String type, final String content) throws InformationServiceException {
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final ResourceType rtype = resourceTypeRepository.findById(type).orElseThrow(() -> new InformationServiceException("Invalid type"));
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if (rtype.getContentType().equals(MediaType.APPLICATION_XML_VALUE)) {
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validateXml(type, content);
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} else if (rtype.getContentType().equals(MediaType.APPLICATION_JSON_VALUE)) {
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validateJSON(content);
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}
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}
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private void validateXml(final String type, final String content) throws InformationServiceException {
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final Schema schema = getXmlSchema(type);
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if (schema == null) {
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log.warn("no registered schema for " + type);
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return;
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}
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final Validator validator = schema.newValidator();
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try {
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validator.validate(new StreamSource(new StringReader(content)));
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} catch (final Exception e) {
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throw new InformationServiceException(e.getMessage(), e);
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}
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}
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private Schema getXmlSchema(final String type) {
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try {
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final InputStream is = getClass().getResourceAsStream("/schemas/" + type + ".xsd");
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if (is == null) { return null; }
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final String schemaSource = IOUtils.toString(is, StandardCharsets.UTF_8.name());
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if (StringUtils.isBlank(schemaSource)) { return null; }
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return SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI).newSchema(new StreamSource(new StringReader(schemaSource)));
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} catch (final SAXException | IOException e) {
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log.fatal("cannot parse resource type schema", e);
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return null;
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}
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}
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private void validateJSON(final String content) throws InformationServiceException {
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final ObjectMapper mapper = new ObjectMapper();
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try {
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mapper.readValue(content, Object.class);
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} catch (final Exception e) {
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throw new InformationServiceException(e.getMessage(), e);
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}
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}
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}
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