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package org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiSubstitutor;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.plugins.groovy.lang.psi.api.GroovyResolveResult;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrConstructorInvocation;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression;
import org.jetbrains.plugins.groovy.lang.psi.impl.GroovyResolveResultImpl;
import org.jetbrains.plugins.groovy.lang.psi.util.PsiUtil;
/**
* Created by Max Medvedev on 15/06/14
*/
public class GrThisReferenceResolver {
@Nullable("null if ref is not actually 'this' reference")
public static GroovyResolveResult[] resolveThisExpression(@NotNull GrReferenceExpression ref) {
GrExpression qualifier = ref.getQualifier();
if (qualifier == null) {
final PsiElement parent = ref.getParent();
if (parent instanceof GrConstructorInvocation) {
return ((GrConstructorInvocation)parent).multiResolve(false);
}
else {
PsiClass aClass = PsiUtil.getContextClass(ref);
if (aClass != null) {
return new GroovyResolveResultImpl[]{new GroovyResolveResultImpl(aClass, null, null, PsiSubstitutor.EMPTY, true, true)};
}
}
}
else if (qualifier instanceof GrReferenceExpression) {
GroovyResolveResult result = ((GrReferenceExpression)qualifier).advancedResolve();
PsiElement resolved = result.getElement();
if (resolved instanceof PsiClass && PsiUtil.hasEnclosingInstanceInScope((PsiClass)resolved, ref, false)) {
return new GroovyResolveResult[]{result};
}
}
return null;
}
}
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