| /* |
| * 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.util.xml.impl; |
| |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.xml.XmlElement; |
| import com.intellij.psi.xml.XmlFile; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * @author peter |
| */ |
| public class VirtualDomParentStrategy implements DomParentStrategy { |
| private final DomInvocationHandler myParentHandler; |
| private long myModCount; |
| private final PsiFile myModificationTracker; |
| |
| public VirtualDomParentStrategy(@NotNull final DomInvocationHandler parentHandler) { |
| myParentHandler = parentHandler; |
| myModificationTracker = parentHandler.getFile(); |
| myModCount = getModCount(); |
| } |
| |
| private long getModCount() { |
| return myModificationTracker.getModificationStamp(); |
| } |
| |
| @Override |
| @NotNull |
| public DomInvocationHandler getParentHandler() { |
| return myParentHandler; |
| } |
| |
| @Override |
| public XmlElement getXmlElement() { |
| return null; |
| } |
| |
| @Override |
| @NotNull |
| public synchronized DomParentStrategy refreshStrategy(final DomInvocationHandler handler) { |
| if (!myParentHandler.isValid()) return this; |
| |
| final long modCount = getModCount(); |
| if (modCount != myModCount) { |
| final XmlElement xmlElement = handler.recomputeXmlElement(myParentHandler); |
| if (xmlElement != null) { |
| return new PhysicalDomParentStrategy(xmlElement, DomManagerImpl.getDomManager(xmlElement.getProject())); |
| } |
| myModCount = modCount; |
| } |
| return this; |
| } |
| |
| @Override |
| @NotNull |
| public DomParentStrategy setXmlElement(@NotNull final XmlElement element) { |
| return new PhysicalDomParentStrategy(element, DomManagerImpl.getDomManager(element.getProject())); |
| } |
| |
| @Override |
| @NotNull |
| public synchronized DomParentStrategy clearXmlElement() { |
| myModCount = getModCount(); |
| return this; |
| } |
| |
| @Override |
| public synchronized String checkValidity() { |
| if (getModCount() == myModCount) { |
| return null; |
| } |
| return "mod count changed"; |
| } |
| |
| @Override |
| public XmlFile getContainingFile(DomInvocationHandler handler) { |
| return DomImplUtil.getFile(handler); |
| } |
| |
| @Override |
| public boolean isPhysical() { |
| return false; |
| } |
| |
| public boolean equals(final Object o) { |
| if (this == o) return true; |
| if (!(o instanceof VirtualDomParentStrategy)) return false; |
| |
| final VirtualDomParentStrategy that = (VirtualDomParentStrategy)o; |
| |
| if (!myParentHandler.equals(that.myParentHandler)) return false; |
| |
| return true; |
| } |
| |
| public int hashCode() { |
| return myParentHandler.hashCode(); |
| } |
| } |