Java Class File Parser

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Java

parsing

I have to create a java parser which should give the follwing outputs;

Class name –
Method Name –
Parameter count of that method –
Return count of that method –
Number of override methods –
Number of new methods –
Number of descends –
Polymorphism factor –

I have to use several test cases & retrive outputs. I have given the followin ClassFile.java code. What I have to do is modify the code to get above outputs. Help me if any one knows how to do this.


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ClassFile.java

import java.io.*;

/**
 * Parses and stores a Java .class file. Parsing is currently incomplete.
 *
 * @author David Cooper
 */
public class ClassFile
{
    private String filename;
    private long magic;
    private int minorVersion;
    private int majorVersion;
    private ConstantPool constantPool;

    // ...

    /**
     * Parses a class file an constructs a ClassFile object. At present, this
     * only parses the header and constant pool.
     */

    public ClassFile(String filename) throws ClassFileParserException,
                                             IOException
    {
        DataInputStream dis =
            new DataInputStream(new FileInputStream(filename));

        this.filename = filename;
        magic = (long)dis.readUnsignedShort() << 16 | dis.readUnsignedShort();
        minorVersion = dis.readUnsignedShort();
        majorVersion = dis.readUnsignedShort();
        constantPool = new ConstantPool(dis);

        // Parse the rest of the class file
        // ...
        // THIS WHERE I SHOULD PUT THE CODE TO GET THOSE OUTPUTS

    }

    /** Returns the contents of the class file as a formatted String. */
    public String toString()
    {
        return String.format(
            "Filename: %s\n" +
            "Magic: 0x%08x\n" +
            "Class file format version: %d.%d\n\n" +
            "Constant pool:\n\n%s",
            filename, magic, majorVersion, minorVersion, constantPool);
    }
}