Package weasel.interpreter.bytecode

Source Code of weasel.interpreter.bytecode.WeaselInstructionReadStaticField

package weasel.interpreter.bytecode;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import weasel.interpreter.WeaselClass;
import weasel.interpreter.WeaselField;
import weasel.interpreter.WeaselInterpreter;
import weasel.interpreter.WeaselMethodExecutor;
import weasel.interpreter.WeaselPrimitive;
import weasel.interpreter.WeaselThread;

public class WeaselInstructionReadStaticField extends WeaselInstruction {

  private final String fieldDesk;
  private WeaselField field;
  private WeaselClass type;
 
  public WeaselInstructionReadStaticField(String fieldDesk){
    this.fieldDesk = fieldDesk;
  }
 
  public WeaselInstructionReadStaticField(DataInputStream dataInputStream) throws IOException{
    fieldDesk = dataInputStream.readUTF();
  }
 
  @Override
  public void run(WeaselInterpreter interpreter, WeaselThread thread, WeaselMethodExecutor method) {
    resolve(interpreter);
    switch(WeaselPrimitive.getPrimitiveID(type)){
    case WeaselPrimitive.BOOLEAN:
      thread.pushValue(field.getBoolean(null));
      break;
    case WeaselPrimitive.BYTE:
      thread.pushValue(field.getByte(null));
      break;
    case WeaselPrimitive.CHAR:
      thread.pushValue(field.getChar(null));
      break;
    case WeaselPrimitive.DOUBLE:
      thread.pushValue(field.getDouble(null));
      break;
    case WeaselPrimitive.FLOAT:
      thread.pushValue(field.getFloat(null));
      break;
    case WeaselPrimitive.INT:
      thread.pushValue(field.getInt(null));
      break;
    case WeaselPrimitive.LONG:
      thread.pushValue(field.getLong(null));
      break;
    case WeaselPrimitive.SHORT:
      thread.pushValue(field.getShort(null));
      break;
    default:
      thread.pushObject(field.getObject(null));
      break;
    }
  }

  private void resolve(WeaselInterpreter interpreter){
    if(field==null || type==null){
      int d = fieldDesk.lastIndexOf(":");
      int p = fieldDesk.lastIndexOf(".", d);
      WeaselClass weaselClass = getWeaselClass(interpreter, fieldDesk.substring(0, p));
      field = weaselClass.getField(fieldDesk.substring(p+1, d));
      type = interpreter.getWeaselClass(fieldDesk.substring(d+1));
    }
  }
 
  @Override
  protected void saveToDataStream(DataOutputStream dataOutputStream) throws IOException {
    dataOutputStream.writeUTF(fieldDesk);
  }
 
  @Override
  public String toString() {
    return "readField static "+fieldDesk;
  }

}
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