CodeAttr.java

package miniJVM.attr;

import miniJVM.clz.ClassFile;
import miniJVM.cmd.ByteCodeCommand;
import miniJVM.cmd.CommandParser;
import miniJVM.constant.ConstantPool;
import miniJVM.loader.ByteCodeIterator;

public class CodeAttr extends AttributeInfo {
	private int maxStack ;
	private int maxLocals ;
	private int codeLen ;
	private String code;
	public String getCode() {
		return code;
	}

	private ByteCodeCommand[] cmds ;
	public ByteCodeCommand[] getCmds() {
		return cmds;
	}
	private LineNumberTable lineNumTable;
	private LocalVariableTable localVarTable;
	private StackMapTable stackMapTable;

	public CodeAttr(int attrNameIndex, int attrLen, int maxStack, int maxLocals, int codeLen,String code, ByteCodeCommand[] cmds) {
		super(attrNameIndex, attrLen);
		this.maxStack = maxStack;
		this.maxLocals = maxLocals;
		this.codeLen = codeLen;
		this.code = code;
		this.cmds = cmds;
	}

	public void setLineNumberTable(LineNumberTable t) {
		this.lineNumTable = t;
	}

	public void setLocalVariableTable(LocalVariableTable t) {
		this.localVarTable = t;
	}

	public static CodeAttr parse(ClassFile clzFile, ByteCodeIterator iter){
		int attributeNameIndex = iter.nextU2ToInt();
		int attributeLength = iter.nextU4ToInt();
		int maxStack = iter.nextU2ToInt();
		int maxLocals = iter.nextU2ToInt();
		int codeLength = iter.nextU4ToInt();
		String cmdCodes = iter.nextUxToHexString(codeLength);
		ByteCodeCommand[] cmds = CommandParser.parse(clzFile, cmdCodes);

		return new CodeAttr(attributeNameIndex, attributeLength, maxStack, maxLocals, codeLength, cmdCodes, cmds);
	}

	public String toString(ConstantPool pool){
		StringBuilder buffer = new StringBuilder();
		//buffer.append("Code:").append(code).append("\n");
		for(int i=0;i<cmds.length;i++){
			buffer.append(cmds[i].toString(pool)).append("\n");
		}
		buffer.append("\n");
		buffer.append(this.lineNumTable.toString());
		buffer.append(this.localVarTable.toString(pool));
		return buffer.toString();
	}

	private void setStackMapTable(StackMapTable t) {
		this.stackMapTable = t;

	}
}