gemlite.core.util.CommandBase.java Source code

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Here is the source code for gemlite.core.util.CommandBase.java

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/*                                                                         
 * Copyright 2010-2013 the original author or authors.                     
 *                                                                         
 * 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 gemlite.core.util;

import java.lang.reflect.Field;
import java.util.Scanner;
import java.util.TreeSet;

import org.apache.commons.lang.StringUtils;
import org.kohsuke.args4j.CmdLineException;
import org.kohsuke.args4j.CmdLineParser;
import org.kohsuke.args4j.Option;

@SuppressWarnings("rawtypes")
public class CommandBase {
    protected TreeSet<CmdField> cmdFields;
    protected CmdLineParser parser;

    public void printMenu() {
        if (cmdFields == null)
            parse();
        StringBuffer buffer = new StringBuffer();
        for (CmdField f : cmdFields) {
            Object value = getValue(f);
            buffer.append(f.option.name()).append(" ").append(value).append(" [").append(f.option.usage())
                    .append("]\n");
        }
        System.out.println(buffer.toString());

    }

    protected void printValue() {
        StringBuffer buffer = new StringBuffer();
        for (CmdField f : cmdFields) {
            Object value = getValue(f);
            // *,""
            if ("*".equals(value.toString())) {
                setValue(f);
            }
            buffer.append(f.option.name()).append(" ").append(value).append(" ");
        }
        System.out.println(buffer.toString());
    }

    private final static String FLAG_WAIT_INPUT = "Input your options,press Enter use last input,press X exit.";
    private final static String FLAG_ANY_KEY = "Press any key to continue,press X exit.";

    protected boolean waitUserInput() {
        return waitUserInput(null, FLAG_WAIT_INPUT);
    }

    protected boolean waitAnyKey() {
        return waitUserInput(null, FLAG_ANY_KEY);
    }

    /***
     * false,?
     * 
     * @return
     * @throws CmdLineException
     */
    protected boolean waitUserInput(String[] args, String msg) {
        Scanner reader = new Scanner(System.in);

        boolean hasInitInput = args != null && args.length > 0;
        if (!hasInitInput)
            System.out.println(msg);
        do//while (hasInitInput && reader.hasNextLine())
        {
            String line = null;
            String[] newArgs = null;
            if (hasInitInput) {
                newArgs = args;
            } else {
                line = reader.nextLine();
                if (line.equalsIgnoreCase("X")) {
                    reader.close();
                    return false;
                }
                newArgs = line.split(" ");
            }
            try {
                if (newArgs.length > 0 && !newArgs[0].isEmpty())
                    parser.parseArgument(newArgs);
                else
                    System.err.println("please input your args!");
                printValue();
            } catch (CmdLineException e) {
                e.printStackTrace();
                System.out.println("Error, last Input:[" + line + "]\nInput:");
                continue;
            }
            break;
        } while (true);
        reader.close();
        return true;
    }

    protected String getValue(CmdField f) {
        Object value = null;
        f.field.setAccessible(true);
        try {
            value = f.field.get(this);
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        return StringUtils.trim("" + value);
    }

    /**
     * 
     * 
     * @param f
     * @return
     */
    protected String setValue(CmdField f) {
        Object value = null;
        f.field.setAccessible(true);
        try {
            f.field.set(this, "");
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        return StringUtils.trim("" + value);
    }

    public void parse() {
        cmdFields = new TreeSet<CmdField>();
        for (Class c = getClass(); c != null; c = c.getSuperclass()) {
            for (Field f : c.getDeclaredFields()) {
                Option o = f.getAnnotation(Option.class);
                if (o != null) {
                    CmdField cf = new CmdField();
                    cf.field = f;
                    cf.option = o;
                    cmdFields.add(cf);
                }
            }
        }
    }

}

class CmdField implements Comparable<CmdField> {
    public Field field;
    public Option option;

    @Override
    public int compareTo(CmdField o) {
        return this.field.getName().compareTo(o.field.getName());
    }
}