tools/qidea/src/main/java/org/qi4j/ide/plugin/idea/common/vfs/VirtualFileUtil.java

/*  Copyright 2008 Edward Yakop.
*
* 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.qi4j.ide.plugin.idea.common.vfs;

import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiFileSystemItem;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @author edward.yakop@gmail.com
 * @since 0.1
 */
public final class VirtualFileUtil
{
    /**
     * @param element element to process.
     * @return The containing virtual file of the element.
     * @since 0.1
     */
    @Nullable
    public static VirtualFile getVirtualFile( @NotNull PsiElement element )
    {
        if( element instanceof PsiFileSystemItem )
        {
            PsiFileSystemItem fileSystemItem = (PsiFileSystemItem) element;
            return fileSystemItem.getVirtualFile();
        }

        // If it's not a file system, assume that this is an element within a file
        PsiFile containingFile = element.getContainingFile();
        if( containingFile == null )
        {
            return null;
        }

        VirtualFile virtualFile = containingFile.getVirtualFile();
        if( virtualFile != null )
        {
            return virtualFile;
        }

        PsiFile originalFile = containingFile.getOriginalFile();
        if( originalFile == null )
        {
            return null;
        }

        return originalFile.getVirtualFile();
    }

    private VirtualFileUtil()
    {
    }
}