org.springframework.binding.expression.support
Class AbstractExpressionParser

java.lang.Object
  org.springframework.binding.expression.support.AbstractExpressionParser

All Implemented Interfaces:

ExpressionParser

Direct Known Subclasses:

BeanWrapperExpressionParser, OgnlExpressionParser

public abstract class AbstractExpressionParser
extends java.lang.Object
implements ExpressionParser

An expression parser that parses Ognl expressions.

Author:

Keith Donald

Constructor Summary

AbstractExpressionParser()

Method Summary

protected abstract Expression	doParseExpression(java.lang.String expressionString, ParserContext context)
boolean	getAllowDelimitedEvalExpressions() Returns if this parser allows delimited eval expressions like ${foo.bar}.
java.lang.String	getExpressionPrefix() Returns the configured expression delimiter prefix.
java.lang.String	getExpressionSuffix() Returns the expression delimiter suffix.
Expression	parseExpression(java.lang.String expressionString, ParserContext context) Parse the expression string and return a compiled Expression object you can use for evaluation.
protected java.util.Map<java.lang.String,Expression>	parseVariableExpressions(ExpressionVariable[] variables)
void	setAllowDelimitedEvalExpressions(boolean allowDelmitedEvalExpressions) Sets if this parser allows eval expressions like ${foo.bar}.
void	setExpressionPrefix(java.lang.String expressionPrefix) Sets the expression delimiter prefix.
void	setExpressionSuffix(java.lang.String expressionSuffix) Sets the expression delimiter suffix.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractExpressionParser

public AbstractExpressionParser()

Method Detail

getExpressionPrefix

public java.lang.String getExpressionPrefix()

Returns the configured expression delimiter prefix. Defaults to "${".

setExpressionPrefix

public void setExpressionPrefix(java.lang.String expressionPrefix)

Sets the expression delimiter prefix.

getExpressionSuffix

public java.lang.String getExpressionSuffix()

Returns the expression delimiter suffix. Defaults to "}".

setExpressionSuffix

public void setExpressionSuffix(java.lang.String expressionSuffix)

Sets the expression delimiter suffix.

getAllowDelimitedEvalExpressions

public boolean getAllowDelimitedEvalExpressions()

Returns if this parser allows delimited eval expressions like ${foo.bar}.

setAllowDelimitedEvalExpressions

public void setAllowDelimitedEvalExpressions(boolean allowDelmitedEvalExpressions)

Sets if this parser allows eval expressions like ${foo.bar}.

parseExpression

public Expression parseExpression(java.lang.String expressionString,
                                  ParserContext context)
                           throws ParserException

Description copied from interface: ExpressionParser

Parse the expression string and return a compiled Expression object you can use for evaluation. Some examples:

     3 + 4
     name.firstName
 

Specified by:

parseExpression in interface ExpressionParser

Parameters:

expressionString - the raw expression string to parse

context - a context for influencing this expression parsing routine (optional)

Returns:

an evaluator for the parsed expression

Throws:

ParserException - an exception occurred during parsing

parseVariableExpressions

protected java.util.Map<java.lang.String,Expression> parseVariableExpressions(ExpressionVariable[] variables)
                                                                       throws ParserException

Throws:

ParserException

doParseExpression

protected abstract Expression doParseExpression(java.lang.String expressionString,
                                                ParserContext context)
                                         throws ParserException

Throws:

ParserException