net.janino
Class Java.UnaryOperation

java.lang.Object
  |
  +--net.janino.Java.Located
        |
        +--net.janino.Java.Atom
              |
              +--net.janino.Java.Rvalue
                    |
                    +--net.janino.Java.BooleanRvalue
                          |
                          +--net.janino.Java.UnaryOperation

All Implemented Interfaces:

Java.Locatable

Enclosing class:

Java

public static class Java.UnaryOperation

extends Java.BooleanRvalue

This class implements the unary operators "+", "-", "~" and "!".

Fields inherited from class net.janino.Java.Rvalue

JUMP_IF_FALSE, JUMP_IF_TRUE

Constructor Summary

Java.UnaryOperation(Scanner.Location location, java.lang.String operator, Java.Rvalue operand)

Method Summary

void	compileBoolean(ClassFile.CodeAttribute codeAttribute, ClassFile.CodeAttribute.Offset dst, boolean orientation) Some Java.Rvalues compile more efficiently when their value is the condition for a branch. Notice that if "this" is a constant, then either "dst" is never branched to, or it is unconditionally branched to.
IClass	compileGet(ClassFile.CodeAttribute codeAttribute) Generates code that determines the value of the Java.Rvalue and puts it on the operand stack.
java.lang.Object	getConstantValue() Attempts to evaluate as a constant expression.
java.lang.Object	getNegatedConstantValue() Attempts to evaluate the negated value of a constant Java.Rvalue.
IClass	getType()

Methods inherited from class net.janino.Java.Rvalue

compile, compileContext, compileGetValue

Methods inherited from class net.janino.Java.Atom

getLocation, isType, throwCompileException, throwParseException, toLvalue, toRvalue, toType

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Java.UnaryOperation

public Java.UnaryOperation(Scanner.Location location,
                           java.lang.String operator,
                           Java.Rvalue operand)

Method Detail

getType

public IClass getType()
               throws Java.CompileException

Overrides:

getType in class Java.Atom

compileGet

public IClass compileGet(ClassFile.CodeAttribute codeAttribute)
                  throws Java.CompileException

Description copied from class: Java.Rvalue

Generates code that determines the value of the Java.Rvalue and puts it on the operand stack. This method relies on that the "context" of the Java.Rvalue is on top of the operand stack (see Java.Rvalue.compileContext(ClassFile.CodeAttribute)).

Overrides:

compileGet in class Java.BooleanRvalue

Following copied from class: net.janino.Java.Rvalue

Returns:

The type of the Java.Rvalue

compileBoolean

public void compileBoolean(ClassFile.CodeAttribute codeAttribute,
                           ClassFile.CodeAttribute.Offset dst,
                           boolean orientation)
                    throws Java.CompileException

Description copied from class: Java.Rvalue

Some Java.Rvalues compile more efficiently when their value is the condition for a branch.
Notice that if "this" is a constant, then either "dst" is never branched to, or it is unconditionally branched to. "Unexamined code" errors may result during bytecode validation.

Overrides:

compileBoolean in class Java.Rvalue

getConstantValue

public java.lang.Object getConstantValue()
                                  throws Java.CompileException

Description copied from class: Java.Rvalue

Attempts to evaluate as a constant expression.

Overrides:

getConstantValue in class Java.Rvalue

Following copied from class: net.janino.Java.Rvalue

Returns:

null if value is not constant; otherwise a String, Byte, Short, Integer, Boolean, Character, Float, Long or Double

getNegatedConstantValue

public java.lang.Object getNegatedConstantValue()
                                         throws Java.CompileException

Description copied from class: Java.Rvalue

Attempts to evaluate the negated value of a constant Java.Rvalue. This is particularly relevant for the smalles value of a numeric literal.

Overrides:

getNegatedConstantValue in class Java.Rvalue

Following copied from class: net.janino.Java.Rvalue

Returns:

null if value is not constant; otherwise a String, Byte, Short, Integer, Boolean, Character, Float, Long or Double