D-Net

package eu.dnetlib.enabling.is.registry.schema;

import java.io.StringReader;

import javax.xml.XMLConstants;

import javax.xml.transform.stream.StreamSource;

import javax.xml.validation.Schema;

import javax.xml.validation.SchemaFactory;

import javax.xml.validation.Validator;

import org.apache.commons.lang3.StringUtils;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Component;

import org.xml.sax.SAXException;

import eu.dnetlib.DnetConstants;

import eu.dnetlib.enabling.is.DnetInformationServiceException;

import eu.dnetlib.enabling.is.store.ISStore;

import eu.dnetlib.enabling.tools.XQueryUtils;

@Component

public class ProfileValidator {

	private static final Log log = LogFactory.getLog(ProfileValidator.class);

	@Autowired

	private ISStore isStore;

	@Autowired

	private XQueryUtils xqueryUtils;

	public boolean isValid(final String type, final String profile) {

		final Schema schema = getSchema(type);

		if (schema == null) { return false; }

		final Validator validator = schema.newValidator();

		try {

			// hack to workaround for #1500

			validator.validate(new StreamSource(new StringReader(profile)));

			return true;

		} catch (final Throwable e) {

			log.warn("The profile is not valid");

			return false;

		}

	}

	private Schema getSchema(final String resourceType) {

		try {

			if (StringUtils.isBlank(resourceType)) { throw new DnetInformationServiceException("Invalid resourceType"); }

			final String schemaSource = isStore.getXML(resourceType, xqueryUtils.getRootCollection() + DnetConstants.RESOURCE_TYPES);

			if ((schemaSource == null) || schemaSource.isEmpty()) {

				log.warn("cannot find resource type " + resourceType);

				return null;

			}

			return SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI).newSchema(new StreamSource(new StringReader(schemaSource)));

		} catch (final DnetInformationServiceException e) {

			log.warn("cannot find resource type " + resourceType, e);

			return null;

		} catch (final SAXException e) {

			log.fatal("cannot parse resource type schema " + resourceType, e);

			return null;

		}

	}

}