/*
 * Copyright 2000-2014 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 com.intellij.psi.impl.source.xml;

import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiElementVisitor;
import com.intellij.psi.PsiReference;
import com.intellij.psi.XmlElementVisitor;
import com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry;
import com.intellij.psi.xml.XmlElementType;
import com.intellij.psi.xml.XmlProcessingInstruction;
import com.intellij.psi.xml.XmlTag;
import com.intellij.psi.xml.XmlTagChild;
import org.jetbrains.annotations.NotNull;

public class XmlProcessingInstructionImpl extends XmlElementImpl implements XmlProcessingInstruction {
  public XmlProcessingInstructionImpl() {
    super(XmlElementType.XML_PROCESSING_INSTRUCTION);
  }

  @Override
  public void accept(@NotNull PsiElementVisitor visitor) {
    if (visitor instanceof XmlElementVisitor) {
      ((XmlElementVisitor)visitor).visitXmlProcessingInstruction(this);
    }
    else {
      visitor.visitElement(this);
    }
  }

  @Override
  public XmlTag getParentTag() {
    final PsiElement parent = getParent();
    if(parent instanceof XmlTag) return (XmlTag)parent;
    return null;
  }

  @Override
  public XmlTagChild getNextSiblingInTag() {
    PsiElement nextSibling = getNextSibling();
    if(nextSibling instanceof XmlTagChild) return (XmlTagChild)nextSibling;
    return null;
  }

  @Override
  public XmlTagChild getPrevSiblingInTag() {
    final PsiElement prevSibling = getPrevSibling();
    if(prevSibling instanceof XmlTagChild) return (XmlTagChild)prevSibling;
    return null;
  }

  @Override
  public PsiReference @NotNull [] getReferences() {
    return ReferenceProvidersRegistry.getReferencesFromProviders(this);
  }
}
