A new interpreter for EASE (5): Support for script keywords

EASE scripts registered in the preferences support  a very cool feature: keyword support in script headers. While this does not sound extremely awesome, it allows to bind scripts to the UI and will allow for more fancy stuff in the near future. Today we will add support for keyword detection in registered BeanShell scripts.

Read all tutorials from this series.

Source code for this tutorial is available on github as a single zip archive, as a Team Project Set or you can browse the files online. 

Step 1: Provide a code parser

Code parser is a big word. Currently all we need to detect in given script code are comments. As there already exists a corresponding base class, all we need to do is to provide a derived class indicating comment tokens:

package org.eclipse.ease.lang.beanshell;

import org.eclipse.ease.AbstractCodeParser;

public class BeanShellCodeParser extends AbstractCodeParser {

 @Override
 protected boolean hasBlockComment() {
  return true;
 }

 @Override
 protected String getBlockCommentEndToken() {
  return "*/";
 }

 @Override
 protected String getBlockCommentStartToken() {
  return "/*";
 }

 @Override
 protected String getLineCommentToken() {
  return "//";
 }
}

Step 2: Register the code parser

Similar to registering the code factory, we also need to register the code parser. Open the plugin.xml and select the scriptType extension for BeanShell. There register the code parser from above. Now EASE is able to parse script headers for keywords and interprets them accordingly.