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/*
 * 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 com.intellij.psi.stubs.IStubElementType;
import com.intellij.psi.tree.TokenSet;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.lexer.KtModifierKeywordToken;
import org.jetbrains.kotlin.psi.psiUtil.KtPsiUtilKt;
import org.jetbrains.kotlin.psi.stubs.KotlinModifierListStub;
import org.jetbrains.kotlin.psi.stubs.elements.KtStubElementTypes;

import java.util.List;

public abstract class KtModifierList extends KtElementImplStub implements KtAnnotationsContainer {

    public KtModifierList(@NotNull KotlinModifierListStub stub, @NotNull IStubElementType nodeType) {
        super(stub, nodeType);
    }

    public KtModifierList(@NotNull ASTNode node) {
        super(node);
    }

    @Override
    public  R accept(@NotNull KtVisitor visitor, D data) {
        return visitor.visitModifierList(this, data);
    }

    @NotNull
    public List getAnnotations() {
        return getStubOrPsiChildrenAsList(KtStubElementTypes.ANNOTATION);
    }

    @NotNull
    public List getAnnotationEntries() {
        return KtPsiUtilKt.collectAnnotationEntriesFromStubOrPsi(this);
    }

    public boolean hasModifier(@NotNull KtModifierKeywordToken tokenType) {
        KotlinModifierListStub stub = getStub();
        if (stub != null) {
            return stub.hasModifier(tokenType);
        }
        return getModifier(tokenType) != null;
    }

    @Nullable
    public PsiElement getModifier(@NotNull KtModifierKeywordToken tokenType) {
        return findChildByType(tokenType);
    }

    @Nullable
    public PsiElement getModifier(@NotNull TokenSet tokenTypes) {
        return findChildByType(tokenTypes);
    }


    public PsiElement getOwner() {
        return getParentByStub();
    }

    @Override
    public void deleteChildInternal(@NotNull ASTNode child) {
        super.deleteChildInternal(child);
        if (getFirstChild() == null) {
            delete();
        }
    }
}