Java ObjectOutputStream Write loadTrace(File file)

Description

Loads a trace from the given file.

License

Open Source License

Parameter

Parameter	Description
file	to read from

Return

a map with key method names as keys and an int to int map as value.

Declaration

public static Map<String, Map<Integer, Integer>> loadTrace(File file) 

Method Source Code

//package com.java2s;
/*/* ww w .  ja va  2s .c om*/
 * Copyright (C) 2011 Saarland University
 * 
 * This file is part of Javalanche.
 * 
 * Javalanche is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Javalanche is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser Public License
 * along with Javalanche.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

import java.io.IOException;
import java.io.ObjectInputStream;

import java.util.HashMap;

import java.util.Map;

import java.util.zip.GZIPInputStream;

public class Main {
    /**
     * Loads a trace from the given file. Returns a map with key method names as
     * keys and an int to int map as value. The key has the from
     * className@methodName.
     * 
     * @param file
     *            to read from
     * 
     * @return a map with key method names as keys and an int to int map as
     *         value.
     */
    public static Map<String, Map<Integer, Integer>> loadTrace(File file) {
        Map<String, Map<Integer, Integer>> classMap = new HashMap<String, Map<Integer, Integer>>();
        ObjectInputStream ois;
        try {
            ois = new ObjectInputStream(new BufferedInputStream(new GZIPInputStream(new FileInputStream(file))));

            int numClasses = ois.readInt();
            for (int i = 0; i < numClasses; i++) {
                String className = ois.readUTF();
                int numLines = ois.readInt();
                Map<Integer, Integer> lineMap = new HashMap<Integer, Integer>();
                for (int j = 0; j < numLines; j++) {
                    lineMap.put(ois.readInt(), ois.readInt());
                }
                classMap.put(className, lineMap);
            }
            ois.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return classMap;
    }
}

Related

1. loadObj(String file)
2. loadSerializableFile(File file)
3. loadSerialized(File file)
4. loadSerializedObject(String fileName)
5. loadSerializedObjectWithExceptions(String fileName)
6. save(File f, T o)
7. save(Object o)
8. save(Object obj, String path)
9. save(Serializable serialized, String filepath)