com.aliyun.openservices.odps.console.resource.GetResourceCommand.java Source code

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Here is the source code for com.aliyun.openservices.odps.console.resource.GetResourceCommand.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 com.aliyun.openservices.odps.console.resource;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.io.IOUtils;

import com.aliyun.odps.FileResource;
import com.aliyun.odps.Odps;
import com.aliyun.odps.OdpsException;
import com.aliyun.odps.Resource;
import com.aliyun.openservices.odps.console.ExecutionContext;
import com.aliyun.openservices.odps.console.ODPSConsoleException;
import com.aliyun.openservices.odps.console.commands.AbstractCommand;

public class GetResourceCommand extends AbstractCommand {

    public static final String[] HELP_TAGS = new String[] { "get", "resource", "download" };

    public static void printUsage(PrintStream out) {
        out.println("Usage: get resource [<projectname>:]<resourcename> <path>");
    }

    private static Pattern PATTERN_PREFIX = Pattern.compile("\\s*GET\\s+RESOURCE(.*)", Pattern.CASE_INSENSITIVE);
    private static Pattern PATTERN = Pattern.compile("\\s*GET\\s+RESOURCE\\s+(.*)\\s+(.*)",
            Pattern.CASE_INSENSITIVE);
    private String projectName;
    private String resourceName;
    private String path;

    public GetResourceCommand(String projectName, String resourceName, String path, String cmd,
            ExecutionContext ctx) {
        super(cmd, ctx);
        this.projectName = projectName;
        this.resourceName = resourceName;
        this.path = path;
    }

    public static GetResourceCommand parse(String cmd, ExecutionContext ctx) throws ODPSConsoleException {
        if (cmd == null || ctx == null) {
            return null;
        }

        Matcher prefix = PATTERN_PREFIX.matcher(cmd);

        boolean match = prefix.matches();

        if (!match) {
            return null;
        }

        Matcher m = PATTERN.matcher(cmd);

        match = m.matches();

        if (!match) {
            System.err.println("Usage: get resource [<project name>:]<resource name> <path>;");
            throw new ODPSConsoleException("Bad command.");
        }

        String resourceName = m.group(1);
        String projectName = ctx.getProjectName();
        if (resourceName.contains(":")) {
            String[] result = resourceName.split(":", 2);
            projectName = result[0];
            resourceName = result[1];
        }

        String path = m.group(2);

        return new GetResourceCommand(projectName, resourceName, path, cmd, ctx);
    }

    @Override
    public void run() throws OdpsException, ODPSConsoleException {
        Odps odps = getCurrentOdps();
        Resource resource = odps.resources().get(projectName, resourceName);

        resource.reload();

        if (!(resource instanceof FileResource)) {
            throw new ODPSConsoleException("Resource should be a File Type Resource(file, jar, py, archive)");
        }

        FileResource fileResource = (FileResource) resource;

        File file = new File(path);
        if (file.exists() && file.isDirectory()) {
            file = new File(path + File.separator + fileResource.getName());
        }
        try {
            FileOutputStream os = new FileOutputStream(file);
            InputStream is = odps.resources().getResourceAsStream(projectName, resourceName);
            IOUtils.copy(is, os);
            is.close();
            os.close();
        } catch (IOException e) {
            throw new ODPSConsoleException(e.getMessage(), e);
        }
        System.err.println("OK");
    }
}