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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.maven.internal.transformation.impl;
import javax.xml.stream.XMLStreamException;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Supplier;
import org.apache.maven.artifact.DefaultArtifact;
import org.apache.maven.internal.transformation.TransformationFailedException;
import org.apache.maven.model.building.ModelBuildingException;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
import org.eclipse.aether.RepositorySystemSession;
/**
* Transformed artifact is derived with some transformation from source artifact.
*
* @since TBD
*/
class TransformedArtifact extends DefaultArtifact {
private static final int SHA1_BUFFER_SIZE = 8192;
private final DefaultConsumerPomArtifactTransformer defaultConsumerPomArtifactTransformer;
private final MavenProject project;
private final Supplier<Path> sourcePathProvider;
private final Path target;
private final RepositorySystemSession session;
private final AtomicReference<String> sourceState;
TransformedArtifact(
DefaultConsumerPomArtifactTransformer defaultConsumerPomArtifactTransformer,
MavenProject project,
Path target,
RepositorySystemSession session,
org.apache.maven.artifact.Artifact source,
Supplier<Path> sourcePathProvider,
String classifier,
String extension) {
super(
source.getGroupId(),
source.getArtifactId(),
source.getVersionRange(),
source.getScope(),
extension,
classifier,
new TransformedArtifactHandler(
classifier, extension, source.getArtifactHandler().getPackaging()));
this.defaultConsumerPomArtifactTransformer = defaultConsumerPomArtifactTransformer;
this.project = project;
this.target = target;
this.session = session;
this.sourcePathProvider = sourcePathProvider;
this.sourceState = new AtomicReference<>(null);
}
@Override
public boolean isResolved() {
return getFile() != null;
}
@Override
public void setFile(File file) {
throw new UnsupportedOperationException("transformed artifact file cannot be set");
}
@Override
public synchronized File getFile() {
try {
String state = mayUpdate();
if (state == null) {
return null;
}
return target.toFile();
} catch (IOException
| NoSuchAlgorithmException
| XMLStreamException
| ModelBuildingException
| ComponentLookupException e) {
throw new TransformationFailedException(e);
}
}
private String mayUpdate()
throws IOException, NoSuchAlgorithmException, XMLStreamException, ModelBuildingException,
ComponentLookupException {
String result;
Path src = sourcePathProvider.get();
if (src == null) {
Files.deleteIfExists(target);
result = null;
} else if (!Files.exists(src)) {
Files.deleteIfExists(target);
result = "";
} else {
String current = sha1(src);
String existing = sourceState.get();
if (!Objects.equals(current, existing)) {
defaultConsumerPomArtifactTransformer.transform(project, session, src, target);
Files.setLastModifiedTime(target, Files.getLastModifiedTime(src));
}
result = current;
}
sourceState.set(result);
return result;
}
static String sha1(Path path) throws NoSuchAlgorithmException, IOException {
MessageDigest md = MessageDigest.getInstance("SHA-1");
try (InputStream fis = Files.newInputStream(path)) {
byte[] buffer = new byte[SHA1_BUFFER_SIZE];
int read;
while ((read = fis.read(buffer)) != -1) {
md.update(buffer, 0, read);
}
}
StringBuilder result = new StringBuilder();
for (byte b : md.digest()) {
result.append(String.format("%02x", b));
}
return result.toString();
}
}