package com.coderising.jvm.cmd;
import com.coderising.jvm.clz.ClassFile;
import com.coderising.jvm.constant.ClassInfo;
import com.coderising.jvm.constant.ConstantPool;
import com.coderising.jvm.constant.FieldRefInfo;
import com.coderising.jvm.constant.UTF8Info;
import com.coderising.jvm.engine.ExecutionResult;
import com.coderising.jvm.engine.Heap;
import com.coderising.jvm.engine.JavaObject;
import com.coderising.jvm.engine.StackFrame;
public class GetStaticFieldCmd extends TwoOperandCmd {
public GetStaticFieldCmd(ClassFile clzFile,String opCode) {
super(clzFile,opCode);
}
@Override
public String toString() {
return super.getOperandAsField();
}
@Override
public void execute(StackFrame frame,ExecutionResult result) {
FieldRefInfo info = (FieldRefInfo)this.getConstantInfo(this.getIndex());
String className = info.getClassName();
String fieldName = info.getFieldName();
String fieldType = info.getFieldType();
if("java/lang/System".equals(className)
&& "out".equals(fieldName)
&& "Ljava/io/PrintStream;".equals(fieldType)){
JavaObject jo = Heap.getInstance().newObject(className);
frame.getOprandStack().push(jo);
}
//TODO 处理非System.out的情况
}
}