/*
* Copyright 2016 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.AbstractIterator;
import org.gradle.api.internal.changedetection.rules.ChangeType;
import org.gradle.api.internal.changedetection.rules.FileChange;
import org.gradle.api.internal.changedetection.rules.TaskStateChange;
import org.gradle.caching.internal.BuildCacheHasher;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
class OrderSensitiveTaskFilePropertyCompareStrategy implements TaskFilePropertyCompareStrategy.Impl {
@Override
public Iterator<TaskStateChange> iterateContentChangesSince(Map<String, NormalizedFileSnapshot> current, Map<String, NormalizedFileSnapshot> previous, final String fileType, boolean isPathAbsolute) {
final Iterator<Map.Entry<String, NormalizedFileSnapshot>> currentEntries = current.entrySet().iterator();
final Iterator<Map.Entry<String, NormalizedFileSnapshot>> previousEntries = previous.entrySet().iterator();
return new AbstractIterator<TaskStateChange>() {
private TaskStateChange remaining;
@Override
protected TaskStateChange computeNext() {
if (remaining != null) {
TaskStateChange next = this.remaining;
remaining = null;
return next;
}
while (true) {
if (currentEntries.hasNext()) {
Map.Entry<String, NormalizedFileSnapshot> current = currentEntries.next();
String absolutePath = current.getKey();
if (previousEntries.hasNext()) {
Map.Entry<String, NormalizedFileSnapshot> other = previousEntries.next();
NormalizedFileSnapshot normalizedSnapshot = current.getValue();
NormalizedFileSnapshot otherNormalizedSnapshot = other.getValue();
String normalizedPath = normalizedSnapshot.getNormalizedPath();
String otherNormalizedPath = otherNormalizedSnapshot.getNormalizedPath();
if (normalizedPath.equals(otherNormalizedPath)) {
if (normalizedSnapshot.getSnapshot().isContentUpToDate(otherNormalizedSnapshot.getSnapshot())) {
continue;
} else {
return new FileChange(absolutePath, ChangeType.MODIFIED, fileType);
}
} else {
String otherAbsolutePath = other.getKey();
remaining = new FileChange(absolutePath, ChangeType.ADDED, fileType);
return new FileChange(otherAbsolutePath, ChangeType.REMOVED, fileType);
}
} else {
return new FileChange(absolutePath, ChangeType.ADDED, fileType);
}
} else {
if (previousEntries.hasNext()) {
return new FileChange(previousEntries.next().getKey(), ChangeType.REMOVED, fileType);
} else {
return endOfData();
}
}
}
}
};
}
@Override
public void appendToHasher(BuildCacheHasher hasher, Collection<NormalizedFileSnapshot> snapshots) {
for (NormalizedFileSnapshot normalizedSnapshot : snapshots) {
normalizedSnapshot.appendToHasher(hasher);
}
}
@Override
public boolean isIncludeAdded() {
return true;
}
}