diff options
Diffstat (limited to 'java/structuralsearch-java/src/com/intellij/structuralsearch/impl/matcher/filters/ExpressionFilter.java')
-rw-r--r-- | java/structuralsearch-java/src/com/intellij/structuralsearch/impl/matcher/filters/ExpressionFilter.java | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/java/structuralsearch-java/src/com/intellij/structuralsearch/impl/matcher/filters/ExpressionFilter.java b/java/structuralsearch-java/src/com/intellij/structuralsearch/impl/matcher/filters/ExpressionFilter.java new file mode 100644 index 000000000000..632cc403eabb --- /dev/null +++ b/java/structuralsearch-java/src/com/intellij/structuralsearch/impl/matcher/filters/ExpressionFilter.java @@ -0,0 +1,39 @@ +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; + } +} |