org.springmodules.validation.valang.javascript
Class ValangJavaScriptTranslator

java.lang.Object
  org.springmodules.validation.valang.javascript.ValangJavaScriptTranslator

public class ValangJavaScriptTranslator
extends Object

Translates a collection of valang validation rules into a JavaScript statement that is capable of validating a HTML form and writes this to a provided Writer. This class is not thread safe so it is recommended that a new instance be created each time a translation is required.

The generated JavaScript code is dependent on the code base found in the file "valang_codebase.js" having already been loaded into the page where the validation will occur.

Author:

Oliver Hutchison

Constructor Summary

ValangJavaScriptTranslator()

Method Summary

protected void	append(char c)
protected void	append(String string)
protected void	appendArrayValidators(Collection<ValidationRule> rules, MessageSourceAccessor messageSource)
protected void	appendJsString(String string)
protected void	appendValidationFunction(org.apache.commons.collections.Predicate p)
protected void	appendValidatorRule(BasicValidationRule rule, MessageSourceAccessor messageSource)
protected void	clearWriter()
protected void	doVisit(Object value)
static Reader	getCodebaseReader() Returns a Reader for accessing the JavaScript codebase used by the translated validation rules.
protected String	getErrorMessage(BasicValidationRule rule, MessageSourceAccessor messageSource)
protected String	getNameForCustomFunction(Function f)
protected String	mathToFunctionName(AbstractMathFunction f)
protected String	operatorToFunctionName(Operator operator)
protected void	setWriter(Writer writer)
void	writeJavaScriptValangValidator(Writer writer, String name, boolean installSelfWithForm, Collection<ValidationRule> rules, MessageSourceAccessor messageSource) Translates the provided set of Valang BasicValidationRules into JavaScript code capable of validating a HTML form and outputs the translated code into the provided writer.

Methods inherited from class java.lang.Object

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

Constructor Detail

ValangJavaScriptTranslator

public ValangJavaScriptTranslator()

Method Detail

getCodebaseReader

public static Reader getCodebaseReader()

Returns a Reader for accessing the JavaScript codebase used by the translated validation rules.

writeJavaScriptValangValidator

public void writeJavaScriptValangValidator(Writer writer,
                                           String name,
                                           boolean installSelfWithForm,
                                           Collection<ValidationRule> rules,
                                           MessageSourceAccessor messageSource)
                                    throws IOException

Translates the provided set of Valang BasicValidationRules into JavaScript code capable of validating a HTML form and outputs the translated code into the provided writer.

Parameters:

writer - the writer to output the JavaScript code into

name - the name of the command that is being validated

installSelfWithForm - should the generated JavaScript attempt to install its self with the form on creation

rules - the collection of BasicValidationRules to translate

messageSource - the message source accessor that will be used to resolve validation messages.

Throws:

IOException

setWriter

protected void setWriter(Writer writer)

clearWriter

protected void clearWriter()

append

protected void append(String string)
               throws IOException

Throws:

IOException

appendJsString

protected void appendJsString(String string)
                       throws IOException

Throws:

IOException

append

protected void append(char c)
               throws IOException

Throws:

IOException

appendArrayValidators

protected void appendArrayValidators(Collection<ValidationRule> rules,
                                     MessageSourceAccessor messageSource)
                              throws IOException

Throws:

IOException

appendValidatorRule

protected void appendValidatorRule(BasicValidationRule rule,
                                   MessageSourceAccessor messageSource)
                            throws IOException

Throws:

IOException

getErrorMessage

protected String getErrorMessage(BasicValidationRule rule,
                                 MessageSourceAccessor messageSource)

appendValidationFunction

protected void appendValidationFunction(org.apache.commons.collections.Predicate p)
                                 throws IOException

Throws:

IOException

doVisit

protected void doVisit(Object value)
                throws IOException

Throws:

IOException

getNameForCustomFunction

protected String getNameForCustomFunction(Function f)

operatorToFunctionName

protected String operatorToFunctionName(Operator operator)

mathToFunctionName

protected String mathToFunctionName(AbstractMathFunction f)