001/*
002 * (C) Copyright 2006-2010 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 */
019package org.nuxeo.shell.fs.cmds;
020
021import java.io.File;
022import java.io.FileInputStream;
023
024import org.nuxeo.shell.Argument;
025import org.nuxeo.shell.Command;
026import org.nuxeo.shell.Context;
027import org.nuxeo.shell.Shell;
028import org.nuxeo.shell.ShellConsole;
029import org.nuxeo.shell.ShellException;
030import org.nuxeo.shell.fs.FileSystem;
031
032/**
033 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
034 */
035@Command(name = "cat", help = "Print the content of a file")
036public class Cat implements Runnable {
037
038    @Context
039    protected Shell shell;
040
041    @Argument(name = "file", index = 0, required = false, help = "The file to print")
042    protected File file;
043
044    public void run() {
045        ShellConsole console = shell.getConsole();
046        if (file == null) {
047            file = shell.getContextObject(FileSystem.class).pwd();
048        }
049        cat(console, file);
050    }
051
052    public static void cat(ShellConsole console, File file) {
053        if (!file.isFile()) {
054            return;
055        }
056        String content = null;
057        try {
058            FileInputStream in = new FileInputStream(file);
059            try {
060                content = FileSystem.readContent(in);
061            } finally {
062                in.close();
063            }
064        } catch (Exception e) {
065            throw new ShellException(e);
066        }
067        console.println(content);
068    }
069}