/*
* Copyright 2010 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.file;
import groovy.lang.Closure;
import org.gradle.api.file.ConfigurableFileCollection;
import org.gradle.api.file.FileCollection;
import org.gradle.api.internal.tasks.DefaultTaskDependency;
import org.gradle.api.internal.tasks.TaskDependencyResolveContext;
import org.gradle.api.internal.tasks.TaskResolver;
import org.gradle.util.UncheckedException;
import java.io.File;
import java.util.*;
import java.util.concurrent.Callable;
/**
* A {@link org.gradle.api.file.FileCollection} which resolves a set of paths relative to a {@link FileResolver}.
*/
public class PathResolvingFileCollection extends CompositeFileCollection implements ConfigurableFileCollection {
private final List<Object> files;
private final String displayName;
private final FileResolver resolver;
private final DefaultTaskDependency buildDependency;
public PathResolvingFileCollection(FileResolver fileResolver, TaskResolver taskResolver, Object... files) {
this("file collection", fileResolver, taskResolver, files);
}
public PathResolvingFileCollection(String displayName, FileResolver fileResolver, TaskResolver taskResolver, Object... files) {
this.displayName = displayName;
this.resolver = fileResolver;
this.files = new ArrayList<Object>(Arrays.asList(files));
buildDependency = new DefaultTaskDependency(taskResolver);
}
public PathResolvingFileCollection clear() {
files.clear();
return this;
}
public String getDisplayName() {
return displayName;
}
public List<?> getSources() {
return files;
}
public ConfigurableFileCollection from(Object... paths) {
for (Object path : paths) {
files.add(path);
}
return this;
}
public ConfigurableFileCollection builtBy(Object... tasks) {
buildDependency.add(tasks);
return this;
}
public Set<Object> getBuiltBy() {
return buildDependency.getValues();
}
public ConfigurableFileCollection setBuiltBy(Iterable<?> tasks) {
buildDependency.setValues(tasks);
return this;
}
@Override
protected void addDependencies(TaskDependencyResolveContext context) {
super.addDependencies(context);
context.add(buildDependency);
}
@Override
protected void addSourceCollections(Collection<FileCollection> sources) {
for (Object element : resolveToFilesAndFileCollections()) {
if (element instanceof FileCollection) {
FileCollection collection = (FileCollection) element;
sources.add(collection);
} else {
File file = (File) element;
sources.add(new SingletonFileCollection(file, buildDependency));
}
}
}
/**
* Converts everything in this collection which is not a FileCollection to Files, but leave FileCollections
* unresolved.
*/
private List<Object> resolveToFilesAndFileCollections() {
List<Object> result = new ArrayList<Object>();
LinkedList<Object> queue = new LinkedList<Object>();
queue.addAll(files);
while (!queue.isEmpty()) {
Object first = queue.removeFirst();
if (first instanceof FileCollection) {
result.add(first);
} else if (first instanceof Closure) {
Closure closure = (Closure) first;
Object closureResult = closure.call();
if (closureResult != null) {
queue.addFirst(closureResult);
}
} else if (first instanceof Collection) {
Collection<?> collection = (Collection<?>) first;
queue.addAll(0, collection);
} else if (first instanceof Object[]) {
Object[] array = (Object[]) first;
queue.addAll(0, Arrays.asList(array));
} else if (first instanceof Callable) {
Callable callable = (Callable) first;
Object callableResult;
try {
callableResult = callable.call();
} catch (Exception e) {
throw UncheckedException.asUncheckedException(e);
}
if (callableResult != null) {
queue.add(0, callableResult);
}
} else {
result.add(resolver.resolve(first));
}
}
return result;
}
}