{"id":37552,"date":"2015-02-26T22:00:21","date_gmt":"2015-02-26T20:00:21","guid":{"rendered":"http:\/\/www.javacodegeeks.com\/?p=37552"},"modified":"2015-02-26T08:34:40","modified_gmt":"2015-02-26T06:34:40","slug":"fetching-list-of-message-codes-from-message-properties","status":"publish","type":"post","link":"https:\/\/www.javacodegeeks.com\/2015\/02\/fetching-list-of-message-codes-from-message-properties.html","title":{"rendered":"Fetching List of message codes from message.properties"},"content":{"rendered":"

Normally messages from message properties are fetched via, key i.e. message code, What if we want to select more than one message property, like a list. To get a list of select message codes from message.properties, we need to customize messageSource bean. To do that, lets create a class ‘CustomisedPluginAwareResourceBundleMessageSource’ which should extend class ‘PluginAwareResourceBundleMessageSource’.<\/p>\n

To fetch all properties we will use getMergedProperties().
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import org.codehaus.groovy.grails.context.support.PluginAwareResourceBundleMessageSource\r\n\r\nclass CustomisedPluginAwareResourceBundleMessageSource extends PluginAwareResourceBundleMessageSource {\r\n    List listMessageCodes(Locale locale, String lookupMessageCode) {\r\n        Properties properties = getMergedProperties(locale).properties\r\n        List listOfCodes = []\r\n        properties.each {\r\n            if (it.key.toString().matches(\/^[\\w.]*${lookupMessageCode}[.\\w]*$\/))\r\n                listOfCodes.add(it.key)\r\n        }\r\n        return listOfCodes\r\n    }\r\n}\r\n<\/pre>\n
Here, ‘listMessageCodes()’ takes two parameters, first is the ‘locale’ we are looking in and second is  ‘string’ which we are searching for ; and it returns the list of codes which contains that string.
 
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Next we need to do is re-define ‘messageSource’ bean in the resources file: <\/p>\n
import com.ig.demoApp.CustomisedPluginAwareResourceBundleMessageSource\r\n\r\nbeans = {\r\n    messageSource(CustomisedPluginAwareResourceBundleMessageSource)  {\r\n        basenames = \"WEB-INF\/grails-app\/i18n\/messages\"\r\n    }\r\n}\r\n<\/pre>\n
That’s it!<\/p>\n
All we need to do is call the method ‘listMessageCodes()’. Here is a small example. <\/p>\n
Mentioned below is a sample of message codes, in message.properties:<\/p>\n
fruit.orange.label=Orange\r\nfruit.black.label=Black Grape\r\nfruit.red.label=Red Apple\r\nfruit.green.label=Green Apple\r\n\r\nsquare.black.label=Black Square\r\nsquare.yellow.label=yellow Square\r\nsquare.red.label=Pink Square\r\n\r\ncircle.violet.label=Violet Circle\r\ncircle.magenta.label=Magenta Circle\r\ncircle.olive.label=Olive Circle\r\n<\/pre>\n
and a controller like: <\/p>\n
package demoapp\r\n\r\nclass DemoController {\r\n\r\n    def messageSource\r\n\r\n    def show() {\r\n        [fruits: messageSource.listMessageCodes(request.locale, \"fruit\"),\r\n        squares: messageSource.listMessageCodes(request.locale, \"square\"),\r\n        circles: messageSource.listMessageCodes(request.locale, \"circle\"),\r\n        blackColorItems:messageSource.listMessageCodes(request.locale, \"black\"),\r\n        redColorItems:messageSource.listMessageCodes(request.locale, \"red\")]\r\n    }\r\n}\r\n<\/pre>\n
a gsp:<\/p>\n
<g:form>\r\n    <p>Available Fruits<\/p>\r\n    <g:each in=\"${fruits}\" var=\"fruit\">\r\n        <span>\r\n            <input type=\"radio\" name=\"fruit\">\r\n            <label><g:message code=\"${fruit}\"\/><\/label>\r\n        <\/span>\r\n    <\/g:each>\r\n\r\n    <p>Available Squares<\/p>\r\n    <g:each in=\"${squares}\" var=\"square\">\r\n        <span>\r\n            <input type=\"radio\" name=\"square\">\r\n            <label><g:message code=\"${square}\"\/><\/label>\r\n        <\/span>\r\n    <\/g:each>\r\n\r\n    <p>Available Circles<\/p>\r\n    <g:each in=\"${circles}\" var=\"circle\">\r\n        <span>\r\n            <input type=\"radio\" name=\"circle\">\r\n            <label><g:message code=\"${circle}\"\/><\/label>\r\n        <\/span>\r\n    <\/g:each>\r\n\r\n    <p>Available Black Color Items<\/p>\r\n    <g:each in=\"${blackColorItems}\" var=\"blackColorItem\">\r\n        <span>\r\n            <input type=\"radio\" name=\"blackColorItem\">\r\n            <label><g:message code=\"${blackColorItem}\"\/><\/label>\r\n        <\/span>\r\n    <\/g:each>\r\n\r\n    <p>Available Red Color Items<\/p>\r\n    <g:each in=\"${redColorItems}\" var=\"redColorItem\">\r\n        <span>\r\n            <input type=\"radio\" name=\"redColorItem\">\r\n            <label><g:message code=\"${redColorItem}\"\/><\/label>\r\n        <\/span>\r\n    <\/g:each>\r\n\r\n<\/g:form>\r\n<\/pre>\n
That’s it :)<\/p>\n