org.jetbrains.kotlin.psi.JetTypeParameter Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* 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 org.jetbrains.kotlin.psi;
import com.intellij.lang.ASTNode;
import com.intellij.psi.PsiElement;
import org.jetbrains.annotations.Contract;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.psi.stubs.KotlinTypeParameterStub;
import org.jetbrains.kotlin.psi.stubs.elements.JetStubElementTypes;
import org.jetbrains.kotlin.types.Variance;
import org.jetbrains.kotlin.lexer.JetTokens;
public class JetTypeParameter extends JetNamedDeclarationStub {
public JetTypeParameter(@NotNull ASTNode node) {
super(node);
}
public JetTypeParameter(@NotNull KotlinTypeParameterStub stub) {
super(stub, JetStubElementTypes.TYPE_PARAMETER);
}
@Override
public R accept(@NotNull JetVisitor visitor, D data) {
return visitor.visitTypeParameter(this, data);
}
@NotNull
public Variance getVariance() {
KotlinTypeParameterStub stub = getStub();
if (stub != null) {
if (stub.isOutVariance()) return Variance.OUT_VARIANCE;
if (stub.isInVariance()) return Variance.IN_VARIANCE;
return Variance.INVARIANT;
}
JetModifierList modifierList = getModifierList();
if (modifierList == null) return Variance.INVARIANT;
if (modifierList.hasModifier(JetTokens.OUT_KEYWORD)) return Variance.OUT_VARIANCE;
if (modifierList.hasModifier(JetTokens.IN_KEYWORD)) return Variance.IN_VARIANCE;
return Variance.INVARIANT;
}
@Nullable
public JetTypeReference setExtendsBound(@Nullable JetTypeReference typeReference) {
JetTypeReference currentExtendsBound = getExtendsBound();
if (currentExtendsBound != null) {
if (typeReference == null) {
PsiElement colon = findChildByType(JetTokens.COLON);
if (colon != null) colon.delete();
currentExtendsBound.delete();
return null;
}
return (JetTypeReference) currentExtendsBound.replace(typeReference);
}
if (typeReference != null) {
PsiElement colon = addAfter(new JetPsiFactory(getProject()).createColon(), getNameIdentifier());
return (JetTypeReference) addAfter(typeReference, colon);
}
return null;
}
@Nullable
public JetTypeReference getExtendsBound() {
return getStubOrPsiChild(JetStubElementTypes.TYPE_REFERENCE);
}
}