/*
* Copyright 2013 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.tasks.compile.incremental;
import com.google.common.collect.Lists;
import org.gradle.api.file.DirectoryTree;
import org.gradle.api.file.SourceDirectorySet;
import org.gradle.api.logging.Logging;
import java.io.File;
import java.util.List;
/**
* Attempts to infer the source root directories for the `source` inputs to a
* {@link org.gradle.api.tasks.compile.JavaCompile} task, in order to determine the `.class` file that corresponds
* to any input source file.
*
* This is a bit of a hack: we'd be better off inspecting the actual source file to determine the name of the class file.
*/
public class CompilationSourceDirs {
private static final org.gradle.api.logging.Logger LOG = Logging.getLogger(IncrementalCompilerDecorator.class);
private final List<Object> sources;
private List<File> sourceRoots;
public CompilationSourceDirs(List<Object> sources) {
this.sources = sources;
}
List<File> getSourceRoots() {
if (sourceRoots == null) {
sourceRoots = Lists.newArrayList();
for (Object source : sources) {
if (isDirectory(source)) {
sourceRoots.add((File) source);
} else if (isDirectoryTree(source)) {
sourceRoots.add(((DirectoryTree) source).getDir());
} else if (isSourceDirectorySet(source)) {
sourceRoots.addAll(((SourceDirectorySet) source).getSrcDirs());
} else {
throw new UnsupportedOperationException();
}
}
}
return sourceRoots;
}
public boolean canInferSourceRoots() {
for (Object source : sources) {
if (!canInferSourceRoot(source)) {
LOG.info("Cannot infer source root(s) for input with type `{}`. Supported types are `File`, `DirectoryTree` and `SourceDirectorySet`. Unsupported input: {}", source.getClass().getSimpleName(), source);
return false;
}
}
return true;
}
private boolean canInferSourceRoot(Object source) {
return isSourceDirectorySet(source)
|| isDirectoryTree(source)
|| isDirectory(source);
}
private boolean isSourceDirectorySet(Object source) {
return source instanceof SourceDirectorySet;
}
private boolean isDirectoryTree(Object source) {
return source instanceof DirectoryTree;
}
private boolean isDirectory(Object source) {
return source instanceof File
&& ((File) source).isDirectory();
}
}