UserExitTools.java

package com.proalpha.pds.ui;
 
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
 
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IPath;
 
public class UserExitTools {
    static final String USEREXITFILEEXTENTIONS = "cdf,fld,if,i,lib,p,pds,tdf,w,cls";
    static final String USEREXITCUSTOMLEVELS = "c,q,u,x,y,z";
    List<String> userexitfiletypes = new ArrayList<>();
    
    
    public static boolean userexitpossible(IFile filename) {
        // without a file we can't check
        if (filename ==null){
            return false;
        }
        
        // Return yes if the file Extension allows USER EXITS
        
        String[] results = USEREXITFILEEXTENTIONS.split(",");
        
        for (String result : results) {
            if (result.equalsIgnoreCase(filename.getFileExtension() )) {
                return true;
            }
        }
 
        return false;
    }
    
    public static boolean userExitFileExists(IFile file, String customlevel) {
        if (file == null){
            return false;
        }
        
        if(file.getFileExtension().equalsIgnoreCase("cls")) {
            return claasUserExitExists(file,customlevel);
        }
        IPath newFilePath;
        //only getRawLocation returns the FULL Path from OS
        newFilePath = file.getRawLocation();
        newFilePath = newFilePath.removeFileExtension();
        newFilePath = newFilePath.addFileExtension(getUserExitFileExt(file,customlevel));
        return newFilePath.toFile().exists();
        
    }
    
    private static String getUserExitFileExt(IFile pAprocedure,String customLevel) {
        
        return customLevel.toLowerCase() + "x" + pAprocedure.getFileExtension().substring(0, 1);
        
    }
    
    private static boolean claasUserExitExists(IFile file, String customlevel) {
        IPath newFilePath = file.getRawLocation();
        String newFileName = newFilePath.removeFileExtension().toString();
        
        // if File ends with the current Custom Level it may be an User Exit. 
        if(newFileName.toUpperCase().endsWith(customlevel.toUpperCase())) {
            newFileName = newFileName.substring(0,newFileName.length() - 1);
            if (Paths.get(newFileName  + ".cls").toFile().exists()){
                return true;
            }
        }
        
        if (newFileName.endsWith("Std"))
            //remove the Std
            newFileName = newFileName.substring(0, newFileName.length() - 3);
            
        return Paths.get(newFileName + customlevel.toUpperCase() + ".cls").toFile().exists();
        
    }
}