com.opensymphony.xwork2.util
Class TextParseUtil

java.lang.Object
  com.opensymphony.xwork2.util.TextParseUtil

public class TextParseUtil
extends Object

Utility class for text parsing.

Version:

$Date: 2007-09-20 14:46:19 +0200 (Do, 20 Sep 2007) $ $Id: TextParseUtil.java 1608 2007-09-20 12:46:19Z mrdon $

Author:

Jason Carreira, Rainer Hermanns, tm_jee

Nested Class Summary

static interface

TextParseUtil.ParsedValueEvaluator A parsed value evaluator for TextParseUtil.

Field Summary

private static int

MAX_RECURSION

Constructor Summary

TextParseUtil()

Method Summary

static Set	commaDelimitedStringToSet(String s) Returns a set from comma delimted Strings.
static String	translateVariables(char open, String expression, ValueStack stack) Converts all instances of ${...} in expression to the value returned by a call to ValueStack.findValue(java.lang.String).
static Object	translateVariables(char open, String expression, ValueStack stack, Class asType) Converted object from variable translation.
static Object	translateVariables(char open, String expression, ValueStack stack, Class asType, TextParseUtil.ParsedValueEvaluator evaluator) Converted object from variable translation.
static Object	translateVariables(char open, String expression, ValueStack stack, Class asType, TextParseUtil.ParsedValueEvaluator evaluator, int maxLoopCount) Converted object from variable translation.
static String	translateVariables(String expression, ValueStack stack) Converts all instances of ${...} in expression to the value returned by a call to ValueStack.findValue(java.lang.String).
static String	translateVariables(String expression, ValueStack stack, TextParseUtil.ParsedValueEvaluator evaluator) Function similarly as translateVariables(char, String, ValueStack) except for the introduction of an additional evaluator that allows the parsed value to be evaluated by the evaluator.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_RECURSION

private static final int MAX_RECURSION

See Also:

Constant Field Values

Constructor Detail

TextParseUtil

public TextParseUtil()

Method Detail

translateVariables

public static String translateVariables(String expression,
                                        ValueStack stack)

Converts all instances of ${...} in expression to the value returned by a call to ValueStack.findValue(java.lang.String). If an item cannot be found on the stack (null is returned), then the entire variable ${...} is not displayed, just as if the item was on the stack but returned an empty string.

Parameters:

expression - an expression that hasn't yet been translated

Returns:

the parsed expression

translateVariables

public static String translateVariables(String expression,
                                        ValueStack stack,
                                        TextParseUtil.ParsedValueEvaluator evaluator)

Function similarly as translateVariables(char, String, ValueStack) except for the introduction of an additional evaluator that allows the parsed value to be evaluated by the evaluator. The evaluator could be null, if it is it will just be skipped as if it is just calling translateVariables(char, String, ValueStack).

A typical use-case would be when we need to URL Encode the parsed value. To do so we could just supply a URLEncodingEvaluator for example.

Parameters:

expression -

stack -

evaluator - The parsed Value evaluator (could be null).

Returns:

the parsed (and possibly evaluated) variable String.

translateVariables

public static String translateVariables(char open,
                                        String expression,
                                        ValueStack stack)

Converts all instances of ${...} in expression to the value returned by a call to ValueStack.findValue(java.lang.String). If an item cannot be found on the stack (null is returned), then the entire variable ${...} is not displayed, just as if the item was on the stack but returned an empty string.

Parameters:

open -

expression -

stack -

Returns:

Translated variable String

translateVariables

public static Object translateVariables(char open,
                                        String expression,
                                        ValueStack stack,
                                        Class asType)

Converted object from variable translation.

Parameters:

open -

expression -

stack -

asType -

Returns:

Converted object from variable translation.

translateVariables

public static Object translateVariables(char open,
                                        String expression,
                                        ValueStack stack,
                                        Class asType,
                                        TextParseUtil.ParsedValueEvaluator evaluator)

Converted object from variable translation.

Parameters:

open -

expression -

stack -

asType -

evaluator -

Returns:

Converted object from variable translation.

translateVariables

public static Object translateVariables(char open,
                                        String expression,
                                        ValueStack stack,
                                        Class asType,
                                        TextParseUtil.ParsedValueEvaluator evaluator,
                                        int maxLoopCount)

Converted object from variable translation.

Parameters:

open -

expression -

stack -

asType -

evaluator -

Returns:

Converted object from variable translation.

commaDelimitedStringToSet

public static Set commaDelimitedStringToSet(String s)

Returns a set from comma delimted Strings.

Parameters:

s - The String to parse.

Returns:

A set from comma delimted Strings.