Replace {tokens} by their attribute value

JA_ReplaceObjectTokens.java

// This file was generated by Mendix Studio Pro.
//
// WARNING: Only the following code will be retained when actions are regenerated:
// - the import list
// - the code between BEGIN USER CODE and END USER CODE
// - the code between BEGIN EXTRA CODE and END EXTRA CODE
// Other code you write will be lost the next time you deploy the project.
// Special characters, e.g., é, ö, à, etc. are supported in comments.

package myfirstmodule.actions;

import com.mendix.systemwideinterfaces.core.IContext;
import com.mendix.webui.CustomJavaAction;
import com.mendix.systemwideinterfaces.core.IMendixObject;
import java.util.regex.*;

public class JA_ReplaceObjectTokens extends CustomJavaAction<java.lang.String>
{
	private IMendixObject MxObject;
	private java.lang.String StringToReplace;

	public JA_ReplaceObjectTokens(IContext context, IMendixObject MxObject, java.lang.String StringToReplace)
	{
		super(context);
		this.MxObject = MxObject;
		this.StringToReplace = StringToReplace;
	}

	@java.lang.Override
	public java.lang.String executeAction() throws Exception
	{
		// BEGIN USER CODE
		Pattern pattern = Pattern.compile("\\{(.+?)\\}");
	    Matcher matcher = pattern.matcher(StringToReplace);
	    StringBuffer buffer = new StringBuffer();

	    while (matcher.find()) {
	        String replacement = MxObject.getValue(getContext(),matcher.group(1));
	        if (replacement != null) {
	            matcher.appendReplacement(buffer, "");
	            buffer.append(replacement);
	        }
	    }
	    matcher.appendTail(buffer);
	    return buffer.toString();
		// END USER CODE
	}

	/**
	 * Returns a string representation of this action
	 */
	@java.lang.Override
	public java.lang.String toString()
	{
		return "JA_ReplaceObjectTokens";
	}

	// BEGIN EXTRA CODE
	// END EXTRA CODE
}