com.plotnix.jex.bexl
Class Interpreter

java.lang.Object
  |
  +--com.plotnix.jex.Interpreter
        |
        +--com.plotnix.jex.bexl.Interpreter

public class Interpreter

extends Interpreter

An Interpreter for the expression language introduced by Jakarta Commons BeanUtils. It understands properties, indexing, dot-separated paths, mapped properties, DynaBeans. See PropertyUtils for the complete description of the language.

Version:

$Revision$

Author:

Dmitri Plotnikov

Constructor Summary

Interpreter()

Method Summary

void	assign(Context context, java.lang.String expression, java.lang.Object value, java.lang.Object[] arguments) Invokes PropertyUtils.setProperty(target, expression, value), where target is passed as the first and only argument.
java.lang.Object	evaluate(Context context, java.lang.String expression, java.lang.Object[] arguments) Invokes PropertyUtils.getProperty(target, expression), where target is passed as the first and only argument.
java.lang.Object	evaluate(Context context, java.lang.String expression, java.lang.Object[] arguments, java.lang.Class valueType) Invokes PropertyUtils.getProperty(target, expression), where target is passed as the first and only argument.
java.util.Iterator	iterate(Context context, java.lang.String expression, java.lang.Object[] arguments) Evaluates the expression, treats the result as a collection and returns an iterator of that collection.

Methods inherited from class com.plotnix.jex.Interpreter

getInterpreter, getInterpreterImplementation, validateExpression, validateIterationExpression, validateVariableExpression

Methods inherited from class java.lang.Object

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

Constructor Detail

Interpreter

public Interpreter()

Method Detail

evaluate

public java.lang.Object evaluate(Context context,
                                 java.lang.String expression,
                                 java.lang.Object[] arguments)

Invokes PropertyUtils.getProperty(target, expression), where target is passed as the first and only argument.

Overrides:

evaluate in class Interpreter

See Also:

Interpreter.evaluate(Context, String, Object[])

evaluate

public java.lang.Object evaluate(Context context,
                                 java.lang.String expression,
                                 java.lang.Object[] arguments,
                                 java.lang.Class valueType)

Invokes PropertyUtils.getProperty(target, expression), where target is passed as the first and only argument.

Overrides:

evaluate in class Interpreter

See Also:

Interpreter.evaluate(Context, String, Object[], Class)

iterate

public java.util.Iterator iterate(Context context,
                                  java.lang.String expression,
                                  java.lang.Object[] arguments)

Evaluates the expression, treats the result as a collection and returns an iterator of that collection.

Overrides:

iterate in class Interpreter

See Also:

Interpreter.iterate(Context, String, Object[])

assign

public void assign(Context context,
                   java.lang.String expression,
                   java.lang.Object value,
                   java.lang.Object[] arguments)

Invokes PropertyUtils.setProperty(target, expression, value), where target is passed as the first and only argument.

Overrides:

assign in class Interpreter

See Also:

Interpreter.assign(Context, String, Object, Object[])