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An FTP(S) NIO.2 file system
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/*
 * FTPFileStore.java
 * Copyright 2016 Rob Spoor
 *
 * 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.github.robtimus.filesystems.ftp;

import static com.github.robtimus.filesystems.SimpleAbstractPath.ROOT_PATH;
import static com.github.robtimus.filesystems.ftp.FTPFileSystem.VIEWS;
import java.io.IOException;
import java.nio.file.FileStore;
import java.nio.file.attribute.FileAttributeView;
import java.nio.file.attribute.FileStoreAttributeView;
import java.util.Objects;
import com.github.robtimus.filesystems.Messages;

/**
 * An FTP file system store.
 *
 * @author Rob Spoor
 */
class FTPFileStore extends FileStore {

    private final FTPFileSystem fs;

    FTPFileStore(FTPFileSystem fs) {
        this.fs = Objects.requireNonNull(fs);
    }

    @Override
    public String name() {
        return fs.toUri(ROOT_PATH).toString();
    }

    @Override
    public String type() {
        return fs.isSecure() ? "ftps" : "ftp"; //$NON-NLS-1$ //$NON-NLS-2$
    }

    @Override
    public boolean isReadOnly() {
        return false;
    }

    @Override
    public long getTotalSpace() throws IOException {
        return fs.getTotalSpace();
    }

    @Override
    public long getUsableSpace() throws IOException {
        return fs.getUsableSpace();
    }

    @Override
    public long getUnallocatedSpace() throws IOException {
        return fs.getUnallocatedSpace();
    }

    @Override
    public boolean supportsFileAttributeView(Class type) {
        return VIEWS.containsView(type);
    }

    @Override
    public boolean supportsFileAttributeView(String name) {
        return VIEWS.containsView(name);
    }

    @Override
    public  V getFileStoreAttributeView(Class type) {
        Objects.requireNonNull(type);
        return null;
    }

    @Override
    public Object getAttribute(String attribute) throws IOException {
        if ("totalSpace".equals(attribute)) { //$NON-NLS-1$
            return getTotalSpace();
        }
        if ("usableSpace".equals(attribute)) { //$NON-NLS-1$
            return getUsableSpace();
        }
        if ("unallocatedSpace".equals(attribute)) { //$NON-NLS-1$
            return getUnallocatedSpace();
        }
        throw Messages.fileStore().unsupportedAttribute(attribute);
    }
}