How to retrieve the value of ASTPrimarySuffix node

[vidhi]

While writing the rule I got stuck at a level where I'm unable to retrieve the value of ASTPrimarySuffix node. Can someone respond to this ASAP.

This is how the tree looks like in PMD.

Block
  BlockStatement
    Statement
     IfStatement
       Expression
         PrimaryExpression
           PrimaryPrefix
             Name:ABC
           PrimarySuffix
             Arguments
           PrimarySuffix:equals

All three Primaryprefix PrimarySuffix and PrimaySuffix falls under PrimaryExpression at same level I want to retrieve the node primarySuffix whose value is equals .

I tried retrieving the value with below line of code but its not working. I'm always getting null.
ASTPrimarySuffix suffixValue = (ASTPrimarySuffix) primaryExpression.getFirstChildOfType(ASTPrimarySuffix.class);

[vidhi]

attaching screenshot

[Andreas Dangel]

I assume, you want the second ASTPrimarySuffix node, whose image happen to be equals. Is this correct?

In your code example, you'll get the first suffix node, which is the wrong node. You would need to use the second node.

In this case, you can call findChildrenOfType(ASTPrimarySuffix.class) which will return a list of all suffix nodes:

List<ASTPrimarySuffix> suffixes = primaryExpression.findChildrenOfType(ASTPrimarySuffix.class);
ASTPrimarySuffix suffixValue = suffixes.get(1);

You could also iterate through the list, to search for the equals call:

List<ASTPrimarySuffix> suffixes = primaryExpression.findChildrenOfType(ASTPrimarySuffix.class);
ASTPrimarySuffix suffixValue = null;
for (ASTPrimarySuffix s : suffixes) {
    if ("equals".equals(s.getImage()) {
        suffixValue = s;
        break;
    }
}

Hope this helps.