ConstantPoolPrinter.java

package com.coderising.jvm.print;

import java.util.List;

import com.coderising.jvm.constant.ClassInfo;
import com.coderising.jvm.constant.ConstantInfo;
import com.coderising.jvm.constant.ConstantPool;
import com.coderising.jvm.constant.FieldRefInfo;
import com.coderising.jvm.constant.MethodRefInfo;
import com.coderising.jvm.constant.NameAndTypeInfo;
import com.coderising.jvm.constant.NullConstantInfo;
import com.coderising.jvm.constant.StringInfo;
import com.coderising.jvm.constant.UTF8Info;

public class ConstantPoolPrinter implements PrintVisitor {
	ConstantPool pool;
	ConstantPoolPrinter(ConstantPool pool){
		this.pool = pool;
	}
	
	public void print(){
		
		System.out.println("Constant Pool:");
		int size = pool.getSize();

		for (int i = 1; i <= size; i++) {
			ConstantInfo info = pool.getConstantInfo(i);
			System.out.print("#" + i + " = ");
			info.accept(this);
		}

	}

	@Override
	public void visit(StringInfo info) {
		StringBuilder buffer = new StringBuilder();
		buffer.append("String    #").append(info.getIndex());
		System.out.println(buffer);
	}
	
	@Override
	public void visit(NameAndTypeInfo info) {
		StringBuilder buffer = new StringBuilder();
		buffer.append("NameAndType    #").append(info.getIndex1()).append(":#")
		.append(info.getIndex2());
		System.out.println(buffer);
		
	}
	
	@Override
	public void visit(MethodRefInfo info) {
		StringBuilder buffer = new StringBuilder();
		buffer.append("MethodRef    #").append(info.getClassInfoIndex()).append(".#")
		.append(info.getNameAndTypeIndex());
		System.out.println(buffer);
		
	}
	
	@Override
	public void visit(FieldRefInfo info) {
		StringBuilder buffer = new StringBuilder();
		buffer.append("FieldRef    #").append(info.getClassInfoIndex()).append(".#")
		.append(info.getNameAndTypeIndex());
		System.out.println(buffer);
		
	}
	
	@Override
	public void visit(ClassInfo info) {
		StringBuilder buffer = new StringBuilder();
		buffer.append("Class    #").append(info.getUtf8Index())
		.append("  ").append(info.getClassName());
		
		System.out.println(buffer);
		
	}
	
	@Override
	public void visit(UTF8Info info) {
		StringBuilder buffer = new StringBuilder();
		buffer.append("UTF8    ").append(info.getValue());
		System.out.println(buffer);
		
	}


	@Override
	public void visit(NullConstantInfo nullConstantInfo) {
		
	}

}