JavaTrigger.java #1

package com.perforce.trigger;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class JavaTrigger {
/*The entry for the triggers table:
 * Triggers:
 *     JavaTrigger form-out client "java -jar c:\p4_ws\smoon_ws\java_trigger\JavaTrigger.jar %formfile%"
 */
	void print(String output) {
		System.out.println(output);
	}
	public static void main(String[] args) throws IOException {
		//JavaTrigger o = new JavaTrigger();
		List<String> tmpArrayList = new ArrayList<String>();
		
		String defaultOpPat = "^SubmitOptions:\\s+submitunchanged";
		String newDefault = "SubmitOptions:\trevertunchanged";
		Pattern opPat = Pattern.compile(defaultOpPat);
		Matcher matcher = opPat.matcher("");
		try {
			BufferedReader in = new BufferedReader(new FileReader(args[0]));
			String eachLine,newLine;
			while((eachLine = in.readLine()) != null) {
				matcher.reset(eachLine);
				if(matcher.find()) {
					//o.print(eachLine);
					newLine = newDefault;
				} else {
					newLine = eachLine;
				}
				tmpArrayList.add(newLine);
			}
			in.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} 
		try {
			BufferedWriter out = new BufferedWriter(new FileWriter(args[0]));
			for(String s: tmpArrayList) {
				out.write(s+"\n");
			}
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
		}		
	}
}