/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
* <p/>
* http://www.apache.org/licenses/LICENSE-2.0
* <p/>
* 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.apache.aries.blueprint.plugin;
import java.io.File;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.Stack;
class PackageFinder {
static Set<String> findPackagesInSources(List<String> compileSourceRoots) {
Set<String> packages = new HashSet<>();
for (String src : compileSourceRoots) {
File root = new File(src);
if (root.exists()) {
packages.addAll(findPackageRoots(root));
}
}
return packages;
}
private static Set<String> findPackageRoots(File file) {
Set<String> packages = new HashSet<>();
Stack<SearchFile> stack = new Stack<>();
stack.add(new SearchFile(null, file));
while (!stack.isEmpty()) {
SearchFile cur = stack.pop();
File[] files = cur.f.listFiles();
boolean foundFile = false;
for (File child : files) {
if (child.isFile()) {
packages.add(cur.prefix);
foundFile = true;
}
}
if (foundFile) {
continue;
}
for (File child : files) {
if (child.isDirectory()) {
stack.add(new SearchFile(cur.prefix != null ? cur.prefix + "." + child.getName() : child.getName(), child));
}
}
}
return packages;
}
private static class SearchFile {
String prefix;
File f;
SearchFile(String prefix, File f) {
this.prefix = prefix;
this.f = f;
}
}
}