/*
* Copyright 2009 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 com.google.common.collect.Sets;
import org.gradle.api.file.FileCollection;
import org.gradle.api.file.FileTree;
import org.gradle.api.internal.file.collections.FileCollectionResolveContext;
import org.gradle.internal.Cast;
import java.util.Arrays;
import java.util.Collection;
import java.util.Set;
public class UnionFileTree extends CompositeFileTree {
private final Set<FileTreeInternal> sourceTrees;
private final String displayName;
public UnionFileTree(FileTreeInternal... sourceTrees) {
this("file tree", Arrays.asList(sourceTrees));
}
public UnionFileTree(String displayName, FileTreeInternal... sourceTrees) {
this(displayName, Arrays.asList(sourceTrees));
}
public UnionFileTree(String displayName, Collection<? extends FileTreeInternal> sourceTrees) {
this.displayName = displayName;
this.sourceTrees = Sets.newLinkedHashSet(sourceTrees);
}
@Override
public String getDisplayName() {
return displayName;
}
@Override
public void visitContents(FileCollectionResolveContext context) {
context.add(sourceTrees);
}
@Override
public UnionFileTree add(FileCollection source) {
if (!(source instanceof FileTree)) {
throw new UnsupportedOperationException(String.format("Can only add FileTree instances to %s.", getDisplayName()));
}
sourceTrees.add(Cast.cast(FileTreeInternal.class, source));
return this;
}
}