platform/core-impl/src/com/intellij/psi/impl/file/UpdateAddedFileProcessor.java

/*
 * 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.file;

import com.intellij.openapi.extensions.ExtensionPointName;
import com.intellij.openapi.extensions.Extensions;
import com.intellij.psi.PsiFile;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @author Maxim.Mossienko
 *         Date: Sep 18, 2008
 *         Time: 3:13:17 PM
 */
public abstract class UpdateAddedFileProcessor {
  private static final ExtensionPointName<UpdateAddedFileProcessor> EP_NAME = ExtensionPointName.create("com.intellij.updateAddedFileProcessor");

  public abstract boolean canProcessElement(@NotNull PsiFile element);

  public abstract void update(PsiFile element, @Nullable PsiFile originalElement) throws IncorrectOperationException;

  @Nullable
  public static UpdateAddedFileProcessor forElement(@NotNull PsiFile element) {
    for(UpdateAddedFileProcessor processor: Extensions.getExtensions(EP_NAME)) {
      if (processor.canProcessElement(element)) {
        return processor;
      }
    }
    return null;
  }
}