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POPut validation messages into database
 

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  1. POPut validation messages into database
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    <p>I want to put validation messages used by Bean Validation (JSR 303) ex.:</p> <pre><code>javax.validation.constraints.AssertFalse.message=must be false javax.validation.constraints.AssertTrue.message=must be true ... </code></pre> <p>into a database so that when an administrator adds a new language he can adds the translations for that language.</p> <p>I know how to access a resource bundle mapped from a database but I can't figure out how to extend/customize the bean validation classes so they can access the validation messages from a database...</p> <p>Is it possible to obtain what I want ?</p> <p>Many thanks in advance for driving me into the right direction.</p> <p>HERE THE SOLUTION (I don't know if this is the best solution but it works...):</p> <p>As suggested by @gastaldi I've created an implementation on MessageInterpolator interface:</p> <pre><code>package giates.validation; import com.infomaxgroup.adaecommerce.bundles.DatabaseResourceBundle; import java.util.Locale; import java.util.Map; import javax.validation.MessageInterpolator; public class LocaleMessageInterpolator implements MessageInterpolator { protected final String BRACE_OPEN = "\\{"; protected final String BRACE_CLOSE = "\\}"; @Override public String interpolate(String message, Context context) { return interpolate(message, context, Locale.ITALIAN); } @Override public String interpolate(String message, Context context, Locale locale) { DatabaseResourceBundle bundle = new DatabaseResourceBundle(locale); String messageKey = context.getConstraintDescriptor().getAttributes().get("message").toString(); message = bundle.getString(messageKey.replaceAll(BRACE_OPEN, "").replaceAll(BRACE_CLOSE, "")); Map&lt;String, Object&gt; attributes = context.getConstraintDescriptor().getAttributes(); for (String key : attributes.keySet()) { String value = attributes.get(key).toString(); key = BRACE_OPEN + key + BRACE_CLOSE; message = message.replaceAll(key, value); } return message; } } </code></pre> <p>then I've created META-INF/validation.xml and added the customized messageinterpolator:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;validation-config xmlns="http://jboss.org/xml/ns/javax/validation/configuration" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jboss.org/xml/ns/javax/validation/configuration"&gt; &lt;message-interpolator&gt;giates.validation.LocaleMessageInterpolator&lt;/message-interpolator&gt; &lt;/validation-config&gt; </code></pre> <p>as soon as I post a model with failed validations the interpolator calls DatabaseResourceBundle and creates the resulting message...</p> <p>All works great !</p>
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