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    • com.mitchellbosecke.pebble.spring4.extension.function.MessageSourceFunction Maven / Gradle / Ivy

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    /*******************************************************************************
 * Copyright (c) 2013 by Mitchell Bösecke
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 ******************************************************************************/
package com.mitchellbosecke.pebble.spring4.extension.function;

import com.mitchellbosecke.pebble.extension.Function;
import com.mitchellbosecke.pebble.template.EvaluationContext;

import org.springframework.context.MessageSource;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Map;

/**
 * 
    
 * Function available to templates in Spring MVC applications in order to
 * resolve message in the application context
 * 
    
 *
 * @author Eric Bussieres
 */
public class MessageSourceFunction implements Function {

  public static final String FUNCTION_NAME = "message";

  private final MessageSource messageSource;

  public MessageSourceFunction(MessageSource messageSource) {
    this.messageSource = messageSource;
  }

  @Override
  public Object execute(Map args) {
    String key = this.extractKey(args);
    List arguments = this.extractArguments(args);
    Locale locale = this.extractLocale(args);

    return this.messageSource.getMessage(key, arguments.toArray(), "???" + key + "???", locale);
  }

  private Locale extractLocale(Map args) {
    EvaluationContext context = (EvaluationContext) args.get("_context");
    return context.getLocale();
  }

  private String extractKey(Map args) {
    return (String) args.get("0");
  }

  private List extractArguments(Map args) {
    int i = 1;
    List arguments = new ArrayList<>();
    while (args.containsKey(String.valueOf(i))) {
      Object param = args.get(String.valueOf(i));
      arguments.add(param);
      i++;
    }
    return arguments;
  }

  @Override
  public List getArgumentNames() {
    return null;
  }
}
    
    
    
    

    




    
    
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