/*
* Copyright 2012 the original author or authors.
*
* Licensed 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 org.gradle.api.internal.artifacts.repositories.resolver;
import org.apache.ivy.util.ContextualSAXHandler;
import org.apache.ivy.util.XMLHelper;
import org.gradle.internal.ErroringAction;
import org.gradle.internal.resource.ExternalResource;
import org.gradle.internal.resource.ResourceException;
import org.gradle.internal.resource.ResourceNotFoundException;
import org.gradle.internal.resource.transport.ExternalResourceRepository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.SAXException;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
class MavenMetadataLoader {
private static final Logger LOGGER = LoggerFactory.getLogger(MavenMetadataLoader.class);
private final ExternalResourceRepository repository;
public MavenMetadataLoader(ExternalResourceRepository repository) {
this.repository = repository;
}
public MavenMetadata load(URI metadataLocation) throws ResourceException {
MavenMetadata metadata = new MavenMetadata();
try {
parseMavenMetadataInfo(metadataLocation, metadata);
} catch (ResourceNotFoundException e) {
throw e;
} catch (Exception e) {
throw new ResourceException(String.format("Unable to load Maven meta-data from %s.", metadataLocation), e);
}
return metadata;
}
private void parseMavenMetadataInfo(final URI metadataLocation, final MavenMetadata metadata) throws Exception {
ExternalResource resource = repository.getResource(metadataLocation);
if (resource == null) {
throw new ResourceNotFoundException(String.format("Maven meta-data not available: %s", metadataLocation));
}
try {
parseMavenMetadataInto(resource, metadata);
} finally {
resource.close();
}
}
private void parseMavenMetadataInto(ExternalResource metadataResource, final MavenMetadata mavenMetadata) throws IOException, SAXException, ParserConfigurationException {
LOGGER.debug("parsing maven-metadata: {}", metadataResource);
metadataResource.withContent(new ErroringAction<InputStream>() {
public void doExecute(InputStream inputStream) throws ParserConfigurationException, SAXException, IOException {
XMLHelper.parse(inputStream, null, new ContextualSAXHandler() {
public void endElement(String uri, String localName, String qName)
throws SAXException {
if ("metadata/versioning/snapshot/timestamp".equals(getContext())) {
mavenMetadata.timestamp = getText();
}
if ("metadata/versioning/snapshot/buildNumber".equals(getContext())) {
mavenMetadata.buildNumber = getText();
}
if ("metadata/versioning/versions/version".equals(getContext())) {
mavenMetadata.versions.add(getText().trim());
}
super.endElement(uri, localName, qName);
}
}, null);
}
});
}
}