org.apache.geode.management.internal.cli.converters.FilePathStringConverter.java Source code

Introduction

Here is the source code for org.apache.geode.management.internal.cli.converters.FilePathStringConverter.java

Source

/*
 * 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
 *
 * 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.apache.geode.management.internal.cli.converters;

import org.apache.commons.lang.StringUtils;
import org.apache.geode.management.cli.ConverterHint;
import org.springframework.shell.core.Completion;
import org.springframework.shell.core.Converter;
import org.springframework.shell.core.MethodTarget;

import java.io.File;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

/**
 * 
 * @since GemFire 7.0
 */
public class FilePathStringConverter implements Converter<String> {
    @Override
    public boolean supports(Class<?> type, String optionContext) {
        return String.class.equals(type) && optionContext.contains(ConverterHint.FILE_PATH);
    }

    @Override
    public String convertFromText(String value, Class<?> targetType, String optionContext) {
        return value;
    }

    public List<String> getRoots() {
        File[] roots = File.listRoots();
        return Arrays.stream(roots).map(File::getAbsolutePath).collect(Collectors.toList());
    }

    /**
     * if path is a dir, it will return the list of files under this dir. if path is a filename, it
     * will return all the siblings of this file
     */
    public List<String> getSiblings(String path) {
        File currentFile = new File(path);

        // if currentFile is not a dir, convert currentFile to it's parent dir
        if (!currentFile.isDirectory()) {
            currentFile = currentFile.getParentFile();
            // a file needs to be in a directory, if the file's parent is null, that means user
            // typed a filename without "./" prefix, but meant to find the file in the current dir.
            if (currentFile == null) {
                currentFile = new File("./");
                path = null;
            } else {
                path = currentFile.getPath();
            }
        }

        // at this point, currentFile should be a directory, we need to return all the files
        // under this directory
        String prefix;
        if (path == null) {
            prefix = "";
        } else {
            prefix = path.endsWith(File.separator) ? path : path + File.separator;
        }
        return Arrays.stream(currentFile.list()).map(s -> prefix + s).collect(Collectors.toList());
    }

    @Override
    public boolean getAllPossibleValues(List<Completion> completions, Class<?> targetType, String existingData,
            String optionContext, MethodTarget target) {
        if (StringUtils.isBlank(existingData)) {
            getRoots().stream().forEach(path -> completions.add(new Completion(path)));
            return !completions.isEmpty();
        }

        getSiblings(existingData).stream().filter(string -> string.startsWith(existingData)).forEach(path -> {
            completions.add(new Completion(path));
        });

        return !completions.isEmpty();
    }

}