/*
* Copyright 2017 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.changedetection.state;
import com.google.common.collect.ImmutableSet;
import com.google.common.hash.HashCode;
import org.gradle.api.file.RelativePath;
import org.gradle.api.internal.file.pattern.PathMatcher;
import org.gradle.api.internal.file.pattern.PatternMatcherFactory;
import org.gradle.caching.internal.BuildCacheHasher;
import java.io.IOException;
import java.io.InputStream;
import java.util.Set;
import java.util.zip.ZipEntry;
public class IgnoringResourceHasher implements ResourceHasher {
private final ResourceHasher delegate;
private final Set<String> ignores;
private final ImmutableSet<PathMatcher> ignoreMatchers;
public IgnoringResourceHasher(Set<String> ignores, ResourceHasher delegate) {
this.delegate = delegate;
this.ignores = ImmutableSet.copyOf(ignores);
ImmutableSet.Builder<PathMatcher> builder = ImmutableSet.builder();
for (String ignore : ignores) {
PathMatcher matcher = PatternMatcherFactory.compile(true, ignore);
builder.add(matcher);
}
this.ignoreMatchers = builder.build();
}
@Override
public HashCode hash(RegularFileSnapshot fileSnapshot) {
if (shouldBeIgnored(fileSnapshot.getRelativePath())) {
return null;
}
return delegate.hash(fileSnapshot);
}
@Override
public HashCode hash(ZipEntry zipEntry, InputStream zipInput) throws IOException {
if (shouldBeIgnored(RelativePath.parse(true, zipEntry.getName()))) {
return null;
}
return delegate.hash(zipEntry, zipInput);
}
private boolean shouldBeIgnored(RelativePath relativePath) {
if (ignoreMatchers.isEmpty()) {
return false;
}
for (PathMatcher ignoreSpec : ignoreMatchers) {
if (ignoreSpec.matches(relativePath.getSegments(), 0)) {
return true;
}
}
return false;
}
@Override
public void appendConfigurationToHasher(BuildCacheHasher hasher) {
hasher.putString(getClass().getName());
for (String ignore : ignores) {
hasher.putString(ignore);
}
delegate.appendConfigurationToHasher(hasher);
}
}