de.ipcon.db.mex

Class VariableDefinitionEvaluator

java.lang.Object

de.ipcon.db.mex.VariableDefinitionEvaluator

All Implemented Interfaces:

MEXTransformerEvaluatorI

public class VariableDefinitionEvaluator
extends java.lang.Object
implements MEXTransformerEvaluatorI

Evaluator for variable definitions. Parses for expressions like {name=value} or {!name=value} and stores them in the transformer's context.

If prefixed with '!' (e.g. {!var=value}), the expression is removed from the output (definition only). Otherwise (e.g. {var=value}), it is replaced by the value itself (definition and expansion).

Constructor Summary

Constructors

Constructor and Description
VariableDefinitionEvaluator()

Method Summary

Modifier and Type	Method and Description
java.lang.CharSequence	evaluate(java.lang.CharSequence s, MEXTransformer transformer) Attempts to match and evaluate a variable definition expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

VariableDefinitionEvaluator

public VariableDefinitionEvaluator()

Method Detail

evaluate

public java.lang.CharSequence evaluate(java.lang.CharSequence s,
                                       MEXTransformer transformer)

Attempts to match and evaluate a variable definition expression.

Specified by:

evaluate in interface MEXTransformerEvaluatorI

Parameters:

s - The content inside the curly braces.

transformer - The MEXTransformer context.

Returns:

The variable value if the pattern is matched and it's a non-exclamation definition, an empty string if it's an exclamation definition, or the original sequence s if no match is found.