org.springframework.context.expression
Class AbstractBeanExpressionResolver

java.lang.Object
  org.springframework.context.expression.AbstractBeanExpressionResolver

All Implemented Interfaces:

BeanExpressionResolver

Direct Known Subclasses:

StandardBeanExpressionResolver

public abstract class AbstractBeanExpressionResolver
extends java.lang.Object
implements BeanExpressionResolver

Abstract implementation of the BeanExpressionResolver interface. Handles the common mixing of expression parts with literal parts.

Subclasses need to implement the evaluateExpression(java.lang.String, org.springframework.beans.factory.config.BeanExpressionContext) template method for actual expression evaluation.

Since:

3.0

Author:

Juergen Hoeller

See Also:

setExpressionPrefix(java.lang.String), setExpressionSuffix(java.lang.String)

Field Summary

static java.lang.String	DEFAULT_EXPRESSION_PREFIX Default expression prefix: "#{"
static java.lang.String	DEFAULT_EXPRESSION_SUFFIX Default expression suffix: "}"

Constructor Summary

AbstractBeanExpressionResolver()

Method Summary

java.lang.Object	evaluate(java.lang.String value, BeanExpressionContext evalContext) Evaluate the given value as an expression, if applicable; return the value as-is otherwise.
protected abstract java.lang.Object	evaluateExpression(java.lang.String exprString, BeanExpressionContext evalContext) Evaluate the given expression.
void	setExpressionPrefix(java.lang.String expressionPrefix) Set the prefix that an expression string starts with.
void	setExpressionSuffix(java.lang.String expressionSuffix) Set the suffix that an expression string ends with.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_EXPRESSION_PREFIX

public static final java.lang.String DEFAULT_EXPRESSION_PREFIX

Default expression prefix: "#{"

See Also:

Constant Field Values

DEFAULT_EXPRESSION_SUFFIX

public static final java.lang.String DEFAULT_EXPRESSION_SUFFIX

Default expression suffix: "}"

See Also:

Constant Field Values

Constructor Detail

AbstractBeanExpressionResolver

public AbstractBeanExpressionResolver()

Method Detail

setExpressionPrefix

public void setExpressionPrefix(java.lang.String expressionPrefix)

Set the prefix that an expression string starts with. The default is "#{".

See Also:

DEFAULT_EXPRESSION_PREFIX

setExpressionSuffix

public void setExpressionSuffix(java.lang.String expressionSuffix)

Set the suffix that an expression string ends with. The default is "}".

See Also:

DEFAULT_EXPRESSION_SUFFIX

evaluate

public java.lang.Object evaluate(java.lang.String value,
                                 BeanExpressionContext evalContext)

Description copied from interface: BeanExpressionResolver

Evaluate the given value as an expression, if applicable; return the value as-is otherwise.

Specified by:

evaluate in interface BeanExpressionResolver

Parameters:

value - the value to check

evalContext - the evaluation context

Returns:

the resolved value (potentially the given value as-is)

evaluateExpression

protected abstract java.lang.Object evaluateExpression(java.lang.String exprString,
                                                       BeanExpressionContext evalContext)

Evaluate the given expression.

Parameters:

exprString - the expression String to evaluate

evalContext - the context to evaluate the expression within

Returns:

the evaluation result