/*
* Copyright 2013-2016 Sergey Ignatov, Alexander Zolotov, Florin Patan
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.goide.psi.impl;
import com.goide.util.GoUtil;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiReferenceBase;
import com.intellij.psi.impl.source.resolve.ResolveCache;
import com.intellij.util.ArrayUtil;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public abstract class GoCachedReference<T extends PsiElement> extends PsiReferenceBase<T> {
protected GoCachedReference(@NotNull T element) {
super(element, TextRange.from(0, element.getTextLength()));
}
private static final ResolveCache.AbstractResolver<GoCachedReference, PsiElement> MY_RESOLVER =
(r, b) -> r.resolveInner();
@Nullable
protected abstract PsiElement resolveInner();
@Nullable
@Override
public final PsiElement resolve() {
return myElement.isValid()
? ResolveCache.getInstance(myElement.getProject()).resolveWithCaching(this, MY_RESOLVER, false, false)
: null;
}
public abstract boolean processResolveVariants(@NotNull GoScopeProcessor processor);
@Override
public PsiElement handleElementRename(String newElementName) throws IncorrectOperationException {
myElement.replace(GoElementFactory.createIdentifierFromText(myElement.getProject(), newElementName));
return myElement;
}
@Override
public boolean isReferenceTo(PsiElement element) {
return GoUtil.couldBeReferenceTo(element, myElement) && super.isReferenceTo(element);
}
@NotNull
@Override
public Object[] getVariants() {
return ArrayUtil.EMPTY_OBJECT_ARRAY;
}
@Override
public boolean equals(Object o) {
return this == o || o instanceof GoCachedReference && getElement() == ((GoCachedReference)o).getElement();
}
@Override
public int hashCode() {
return getElement().hashCode();
}
}