Java Path File Name nio getSourceRoot(Path filePath, String pkgName)

Description

get Source Root

License

Open Source License

Declaration

public static String getSourceRoot(Path filePath, String pkgName) 

Method Source Code

//package com.java2s;
/*//w ww .ja  va2  s  .c  om
*  Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
*  WSO2 Inc. 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
*
*    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.
*/

import java.io.File;

import java.nio.file.Path;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import java.util.regex.Pattern;

public class Main {
    public static String getSourceRoot(Path filePath, String pkgName) {
        if (filePath == null || filePath.getParent() == null) {
            return null;
        }
        Path parentPath = filePath.getParent();
        if (parentPath == null) {
            return null;
        }
        List<String> pathParts = Arrays.asList(parentPath.toString().split(Pattern.quote(File.separator)));

        List<String> pkgParts = "".equals(pkgName) ? new ArrayList<>()
                : Arrays.asList(pkgName.split(Pattern.quote(".")));
        Collections.reverse(pkgParts);
        boolean foundProgramDir = true;
        for (int i = 1; i <= pkgParts.size(); i++) {
            if (!pathParts.get(pathParts.size() - i).equals(pkgParts.get(i - 1))) {
                foundProgramDir = false;
                break;
            }
        }
        if (!foundProgramDir) {
            return null;
        }

        List<String> programDirParts = pathParts.subList(0, pathParts.size() - pkgParts.size());
        return String.join(File.separator, programDirParts);
    }
}

Related

1. getResourceRootPath(Class resourceClass, String resourceName)
2. getRoot(final String pathName)
3. getRootPathFromDirectory(String resourceName, URL resource)
4. getSimpleName(String path)
5. getSolrCorePath(Path solrHome, String indexName)
6. getTestDataPath(Class clazz, String name)
7. getUniqueFileInDirectory(Path dir, String name)
8. inheritGwtModule(Path path, String inheritableModuleLogicalName)
9. initializePath(String... envVarNames)