new.java~34~

来自「Java源码」· JAVA~34~ 代码 · 共 75 行

package AM.vm_impl.instruction;

import AM.am_data_structure.Instruction;
import AM.am_data_structure.AbstractMachineState;
import AM.vm_impl.util.Tracer;
import AM.vm_impl.vm_data_structure.VM_DataArea;
import AM.vm_impl.vm_data_structure.VM_Program;
import AM.vm_impl.util.SystemClassLoader;
import java.io.File;

/**
 * Created by IntelliJ IDEA. User: yellowicq Date: 2004-4-27 Time: 14:48:58
 * To change this template use File | Settings | File Templates.
 */
public class NEW
    implements Instruction {
  private String className;

  private NEW() {}

  public NEW(String className) {
    this.className = className;
  }

  public String Name() {
    return "new";
  }

  public int NumArguments() {
    return 1;
  }

  public String ToString() {
    return Name();
  }

  public void SI(AbstractMachineState state) {
    Tracer.debug("SI new");
    Class clazz = null;
    Object object = null;
    VM_DataArea VM_da = (VM_DataArea) state.getDataArea();
    VM_Program VM_prog = (VM_Program) state.getProgram();
    try {
      clazz = new SystemClassLoader(".." + File.separatorChar + ".." +
                                    File.separatorChar +
                                    "..").loadClass(className);
      if (clazz == null) {
        throw new ClassNotFoundException("Class is null");
      }
      object = clazz.newInstance();
      VM_da.methodArea.addClassMapping(className, clazz);
      VM_da.heap.addObjectMapping(className, object);
    }
    catch (ClassNotFoundException ex) {
      ex.printStackTrace();
    }
    catch (IllegalAccessException ex) {
      ex.printStackTrace();
    }
    catch (InstantiationException ex) {
      ex.printStackTrace();
    }

    //move the cp pointer to next
    synchronized (this) {
      VM_prog.Next();
      VM_da.regs.setCP_GLOBAL(VM_prog.Consult_CP());
    }
  }

  public void Process(String args[]) {
    // Proces the text representation of the instruction
  }
}