org.jboss.byteman.rule.expression
Class LogicalExpression

java.lang.Object
  extended by org.jboss.byteman.rule.RuleElement
      extended by org.jboss.byteman.rule.expression.Expression
          extended by org.jboss.byteman.rule.expression.OperExpression
              extended by org.jboss.byteman.rule.expression.BinaryOperExpression
                  extended by org.jboss.byteman.rule.expression.BooleanExpression
                      extended by org.jboss.byteman.rule.expression.LogicalExpression

public class LogicalExpression
extends BooleanExpression

A binary logical operator expression


Field Summary
 
Fields inherited from class org.jboss.byteman.rule.expression.OperExpression
AND, ASSIGN, BAND, BINARY, BOR, BXOR, COND, DIV, EQ, GE, GT, LE, LT, MINUS, MOD, MUL, NE, NOT, oper, OR, PLUS, TERNARY, TWIDDLE, UMINUS, UNARY
 
Fields inherited from class org.jboss.byteman.rule.expression.Expression
charPos, line, rule, token, type
 
Constructor Summary
LogicalExpression(Rule rule, int oper, ParseNode token, Expression left, Expression right)
           
 
Method Summary
 void compile(MethodVisitor mv, CompileContext compileContext)
           
 java.lang.Object interpret(HelperAdapter helper)
          evaluate the expression by interpreting the expression tree
 Type typeCheck(Type expected)
          ensure that all type references in the expression and its component expressions can be resolved, that the type of the expression is well-defined and that it is compatible with the type expected in the context in which it occurs.
 
Methods inherited from class org.jboss.byteman.rule.expression.BinaryOperExpression
bind, getOperand
 
Methods inherited from class org.jboss.byteman.rule.expression.OperExpression
convertOper, writeTo
 
Methods inherited from class org.jboss.byteman.rule.expression.Expression
getPos, getType
 
Methods inherited from class org.jboss.byteman.rule.RuleElement
compileBooleanConversion, compileBox, compileNumericConversion, compileObjectConversion, compilePrimitiveConversion, compileStringConversion, compileTypeConversion, compileUnbox, getBindings, getTypeGroup, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

LogicalExpression

public LogicalExpression(Rule rule,
                         int oper,
                         ParseNode token,
                         Expression left,
                         Expression right)
Method Detail

typeCheck

public Type typeCheck(Type expected)
               throws TypeException
Description copied from class: Expression
ensure that all type references in the expression and its component expressions can be resolved, that the type of the expression is well-defined and that it is compatible with the type expected in the context in which it occurs.

Specified by:
typeCheck in class Expression
Parameters:
expected - the type expected for the expression in the contxet in which it occurs. this may be void but should not be undefined at the point where type checking is performed.
Throws:
TypeException

interpret

public java.lang.Object interpret(HelperAdapter helper)
                           throws ExecuteException
Description copied from class: Expression
evaluate the expression by interpreting the expression tree

Specified by:
interpret in class Expression
Parameters:
helper - an execution context associated with the rule which contains a map of current bindings for rule variables and another map of their declared types both of which are indexed by variable name. This includes entries for the helper (name "-1"), the recipient if the trigger method is not static (name "0") and the trigger method arguments (names "1", ...)
Returns:
the result of evaluation as an Object
Throws:
ExecuteException

compile

public void compile(MethodVisitor mv,
                    CompileContext compileContext)
             throws CompileException
Specified by:
compile in class RuleElement
Throws:
CompileException