com.lithium.flow.filer.Record.java Source code

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Here is the source code for com.lithium.flow.filer.Record.java

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/*
 * Copyright 2015 Lithium Technologies, Inc.
 *
 * 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 com.lithium.flow.filer;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;

import java.io.File;
import java.io.Serializable;
import java.net.URI;
import java.util.Optional;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

/**
 * Details for a single file from a {@link Filer}.
 *
 * @author Matt Ayres
 */
public class Record implements Serializable {
    private static final long serialVersionUID = -4759712231322406072L;

    public static final long NO_EXIST_SIZE = -1;

    private final URI uri;
    private final String parent;
    private final String name;
    private final long time;
    private final long size;
    private final boolean dir;
    private volatile transient String path;

    public Record(@Nonnull URI uri, @Nullable String parent, @Nonnull String name, long time, long size,
            boolean dir) {
        checkNotNull(name);
        checkArgument(!name.contains("/"), "name cannot include '/' in it: %s", name);
        this.uri = checkNotNull(uri);
        this.parent = parent;
        this.name = name;
        this.time = time;
        this.size = size;
        this.dir = dir;
    }

    @Nonnull
    public URI getUri() {
        return uri;
    }

    @Nonnull
    public Optional<String> getParent() {
        return Optional.ofNullable(parent);
    }

    @Nonnull
    public String getName() {
        return name;
    }

    @Nonnull
    public String getPath() {
        if (path == null) {
            path = parent == null ? "/" : parent.equals("/") ? "/" + name : parent + "/" + name;
        }
        return path;
    }

    public long getTime() {
        return time;
    }

    public long getSize() {
        return size;
    }

    public boolean exists() {
        return size != NO_EXIST_SIZE;
    }

    public boolean isDir() {
        return dir;
    }

    public boolean isFile() {
        return !dir;
    }

    @Nonnull
    public Record withName(String newName) {
        return new Record(uri, parent, newName, time, size, dir);
    }

    @Nonnull
    public Record withSize(long newSize) {
        return new Record(uri, parent, name, time, newSize, dir);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }

        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        Record that = (Record) o;
        return dir == that.dir && size == that.size && time == that.time && uri.equals(that.uri)
                && name.equals(that.name);
    }

    @Override
    public int hashCode() {
        int result = uri.hashCode();
        result = 31 * result + name.hashCode();
        result = 31 * result + (int) (time ^ (time >>> 32));
        result = 31 * result + (int) (size ^ (size >>> 32));
        result = 31 * result + (dir ? 1 : 0);
        return result;
    }

    @Override
    @Nonnull
    public String toString() {
        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
    }

    @Nonnull
    public static Record noFile(@Nonnull URI uri, @Nonnull String path) {
        checkNotNull(uri);
        checkNotNull(path);
        File file = new File(path);
        return new Record(uri, file.getParent(), file.getName(), 0, NO_EXIST_SIZE, false);
    }
}