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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 org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.psi.stubs.KotlinPlaceHolderStub;
import org.jetbrains.kotlin.psi.stubs.elements.KtStubElementTypes;

import java.util.List;

/**
 * A group of annotation entries applied to the same use-site target. Can be used to avoid writing use-site target multiple times.
 * 
 * Syntax examples:
 * 

 *     {@code @file:[Annotation1, Annotation2]}
 *     {@code @set:[Inject, Autowire]}
 * 
 * 
 * For a single annotation entry, see {@link KtAnnotationEntry}.
 */
public class KtAnnotation extends KtElementImplStub> {

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

    public KtAnnotation(KotlinPlaceHolderStub stub) {
        super(stub, KtStubElementTypes.ANNOTATION);
    }

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

    public List getEntries() {
        return getStubOrPsiChildrenAsList(KtStubElementTypes.ANNOTATION_ENTRY);
    }

    @Nullable
    public KtAnnotationUseSiteTarget getUseSiteTarget() {
        return getStubOrPsiChild(KtStubElementTypes.ANNOTATION_TARGET);
    }

    public void removeEntry(@NotNull KtAnnotationEntry entry) {
        if (getEntries().size() > 1) {
            entry.delete();
        }
        else {
            delete();
        }
    }
}