AntPathConverter.java

/*
 * Copyright 2000-2010 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.napile.idea.thermit.dom;

import java.io.File;

import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.openapi.vfs.LocalFileSystem;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFileSystemItem;
import com.intellij.psi.PsiManager;
import com.intellij.psi.PsiReference;
import com.intellij.util.xml.ConvertContext;
import com.intellij.util.xml.Converter;
import com.intellij.util.xml.CustomReferenceConverter;
import com.intellij.util.xml.GenericAttributeValue;
import com.intellij.util.xml.GenericDomValue;

/**
 * @author Eugene Zhuravlev
 *         Date: Apr 26, 2010
 */
public class AntPathConverter extends Converter<PsiFileSystemItem> implements CustomReferenceConverter<PsiFileSystemItem>
{

	private final boolean myShouldValidateRefs;

	public AntPathConverter()
	{
		this(false);
	}

	protected AntPathConverter(boolean validateRefs)
	{
		myShouldValidateRefs = validateRefs;
	}

	@Override
	public PsiFileSystemItem fromString(@Nullable @NonNls String s, ConvertContext context)
	{
		final GenericAttributeValue attribValue = context.getInvocationElement().getParentOfType(GenericAttributeValue.class, false);
		if(attribValue == null)
		{
			return null;
		}
		String path = attribValue.getStringValue();
		if(path == null)
		{
			path = getAttributeDefaultValue(context, attribValue);
		}
		if(path == null)
		{
			return null;
		}
		File file = new File(path);
		if(!file.isAbsolute())
		{
			final AntDomProject antProject = getEffectiveAntProject(attribValue);
			if(antProject == null)
			{
				return null;
			}
			file = new File(getPathResolveRoot(context, antProject), path);
		}
		VirtualFile vFile = LocalFileSystem.getInstance().findFileByPath(FileUtil.toSystemIndependentName(file.getAbsolutePath()));
		if(vFile == null)
		{
			return null;
		}
		final PsiManager psiManager = context.getPsiManager();

		return vFile.isDirectory() ? psiManager.findDirectory(vFile) : psiManager.findFile(vFile);
	}

	protected AntDomProject getEffectiveAntProject(GenericAttributeValue attribValue)
	{
		AntDomProject project = attribValue.getParentOfType(AntDomProject.class, false);
		if(project != null)
		{
			project = project.getContextAntProject();
		}
		return project;
	}

	@Nullable
	protected String getPathResolveRoot(ConvertContext context, AntDomProject antProject)
	{
		return antProject.getProjectBasedirPath();
	}

	@Nullable
	protected String getAttributeDefaultValue(ConvertContext context, GenericAttributeValue attribValue)
	{
		return null;
	}

	@Override
	public String toString(@Nullable PsiFileSystemItem file, ConvertContext context)
	{
		final GenericAttributeValue attribValue = context.getInvocationElement().getParentOfType(GenericAttributeValue.class, false);
		if(attribValue == null)
		{
			return null;
		}
		return attribValue.getRawText();
	}


	@NotNull
	public PsiReference[] createReferences(GenericDomValue<PsiFileSystemItem> genericDomValue, PsiElement element, ConvertContext context)
	{
		if(genericDomValue instanceof GenericAttributeValue)
		{
			final GenericAttributeValue attrib = (GenericAttributeValue) genericDomValue;
			if(attrib.getRawText() != null)
			{
				final AntDomFileReferenceSet refSet = new AntDomFileReferenceSet(attrib, myShouldValidateRefs);
				return refSet.getAllReferences();
			}
		}
		return PsiReference.EMPTY_ARRAY;
	}

}