| package com.intellij.structuralsearch.impl.matcher.filters; |
| |
| import com.intellij.dupLocator.util.NodeFilter; |
| import com.intellij.psi.JavaElementVisitor; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiExpression; |
| import com.intellij.psi.PsiReferenceExpression; |
| |
| /** |
| * Filters expression nodes |
| */ |
| public class ExpressionFilter extends JavaElementVisitor implements NodeFilter { |
| protected boolean result; |
| |
| @Override public void visitReferenceExpression(PsiReferenceExpression psiReferenceExpression) { |
| result = true; |
| } |
| |
| @Override public void visitExpression(PsiExpression psiExpression) { |
| result = true; |
| } |
| |
| private static class NodeFilterHolder { |
| private static final NodeFilter instance = new ExpressionFilter(); |
| } |
| |
| public static NodeFilter getInstance() { |
| return NodeFilterHolder.instance; |
| } |
| |
| private ExpressionFilter() { |
| } |
| |
| public boolean accepts(PsiElement element) { |
| result = false; |
| if (element!=null) element.accept(this); |
| return result; |
| } |
| } |