package nl.tudelft.simulation.dsol.interpreter.operations; import java.io.DataInput; import java.io.IOException; import nl.tudelft.simulation.dsol.interpreter.InterpreterException; import nl.tudelft.simulation.dsol.interpreter.LocalVariable; import nl.tudelft.simulation.dsol.interpreter.OperandStack; import nl.tudelft.simulation.dsol.interpreter.classfile.Constant; import nl.tudelft.simulation.dsol.interpreter.classfile.ConstantClass; /** * The NEW operation as defined in * http://java.sun.com/docs/books/vmspec/2nd-edition/html/Instructions2.doc10.html . *

* (c) copyright 2002-2014 Delft University of Technology.
* BSD-style license. See DSOL License.
* @author Peter Jacobs * @author Alexander Verbraeck */ public class NEW extends VoidOperation { /** OP refers to the operand code. */ public static final int OP = 187; /** index refers to the constantpool index. */ private final int index; /** * constructs a new NEW. * @param dataInput the dataInput * @throws IOException on IOfailure */ public NEW(final DataInput dataInput) throws IOException { super(); this.index = dataInput.readUnsignedShort(); } /** {@inheritDoc} */ @Override public final void execute(final OperandStack stack, final Constant[] constantPool, final LocalVariable[] localVariables) { try { Class instanceClass = null; instanceClass = ((ConstantClass) constantPool[this.index]).getValue().getClassValue(); stack.push(new UninitializedInstance(instanceClass)); } catch (Exception exception) { throw new InterpreterException(exception); } } /** {@inheritDoc} */ @Override public final int getByteLength() { return OPCODE_BYTE_LENGTH + 2; } /** {@inheritDoc} */ @Override public final int getOpcode() { return NEW.OP; } /** * holder class for "to-be-constructed" instances. */ public static class UninitializedInstance { /** the value. */ private Class instanceClass = null; /** * constructs a new UninitializedInstance. * @param instanceClass the class of which an instance must be made */ public UninitializedInstance(final Class instanceClass) { this.instanceClass = instanceClass; } /** * @return return the instanceClass */ public final Class getInstanceClass() { return this.instanceClass; } } }