de.tiqsolutions.hdfs.BasicFileAttributeViewImpl.java Source code

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Here is the source code for de.tiqsolutions.hdfs.BasicFileAttributeViewImpl.java

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/*******************************************************************************
 * 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 de.tiqsolutions.hdfs;

import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributeView;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.FileTime;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.NullArgumentException;

class BasicFileAttributeViewImpl implements BasicFileAttributeView {

    static final String NAME = "basic";
    protected final HadoopFileSystemPath path;

    public BasicFileAttributeViewImpl(Path path) {
        if (path == null)
            throw new NullArgumentException("path");
        if (!HadoopFileSystemPath.class.isInstance(path))
            throw new IllegalArgumentException("path");
        this.path = (HadoopFileSystemPath) path;

    }

    @Override
    public String name() {
        return NAME;
    }

    @Override
    public BasicFileAttributes readAttributes() throws IOException {
        return new BasicFileAttributesImpl(path);
    }

    @Override
    public void setTimes(FileTime lastModifiedTime, FileTime lastAccessTime, FileTime createTime)
            throws IOException {
        if (lastModifiedTime == null || lastAccessTime == null) {
            BasicFileAttributes attributes = readAttributes();
            if (lastModifiedTime == null)
                lastModifiedTime = attributes.lastModifiedTime();
            if (lastAccessTime == null)
                lastAccessTime = attributes.lastAccessTime();
        }
        ((HadoopFileSystem) path.getFileSystem()).getFileContext().setTimes(((HadoopFileSystemPath) path).getPath(),
                lastModifiedTime.toMillis(), lastAccessTime.toMillis());

    }

    Map<String, Object> readAttributes(String attributes) throws IOException {
        BasicFileAttributes attr = readAttributes();
        List<String> attrlist = Arrays.asList(attributes.split(","));
        boolean readall = attrlist.contains("*");
        Map<String, Object> ret = new HashMap<>();
        if (readall || attrlist.contains("fileKey"))
            ret.put("fileKey", attr.fileKey());
        if (readall || attrlist.contains("creationTime"))
            ret.put("creationTime", attr.creationTime());
        if (readall || attrlist.contains("isDirectory"))
            ret.put("isDirectory", attr.isDirectory());
        if (readall || attrlist.contains("isOther"))
            ret.put("isOther", attr.isOther());
        if (readall || attrlist.contains("isRegularFile"))
            ret.put("isRegularFile", attr.isRegularFile());
        if (readall || attrlist.contains("isSymbolicLink"))
            ret.put("isSymbolicLink", attr.isSymbolicLink());
        if (readall || attrlist.contains("lastAccessTime"))
            ret.put("lastAccessTime", attr.lastAccessTime());
        if (readall || attrlist.contains("lastModifiedTime"))
            ret.put("lastModifiedTime", attr.lastModifiedTime());
        if (readall || attrlist.contains("size"))
            ret.put("size", attr.size());
        return ret;
    }

}