ThermitWorkspaceConfiguration.java

/*
 * Copyright 2000-2012 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.config.impl;

import java.util.List;
import java.util.concurrent.atomic.AtomicReference;

import org.jdom.Element;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.Nullable;
import org.napile.idea.thermit.config.AntBuildFile;
import org.napile.idea.thermit.config.AntBuildFileBase;
import org.napile.idea.thermit.config.ThermitConfiguration;
import com.intellij.openapi.components.PersistentStateComponent;
import com.intellij.openapi.components.ServiceManager;
import com.intellij.openapi.components.State;
import com.intellij.openapi.components.Storage;
import com.intellij.openapi.components.StoragePathMacros;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Comparing;
import com.intellij.openapi.util.DefaultJDOMExternalizer;
import com.intellij.openapi.util.InvalidDataException;
import com.intellij.openapi.util.WriteExternalException;

@State(
		name = "thermitWorkspaceConfiguration",
		storages = {
				@Storage(
						file = StoragePathMacros.WORKSPACE_FILE
				)
		}
)
public class ThermitWorkspaceConfiguration implements PersistentStateComponent<Element>
{
	private static final Logger LOG = Logger.getInstance("#org.napile.idea.thermit.config.impl.ThermitWorkspaceConfiguration");
	private final Project myProject;
	@NonNls
	private static final String BUILD_FILE = "buildFile";
	@NonNls
	private static final String URL = "url";
	private final AtomicReference<Element> myProperties = new AtomicReference<Element>(null);

	public boolean IS_AUTOSCROLL_TO_SOURCE;
	public boolean FILTER_TARGETS;

	public ThermitWorkspaceConfiguration(Project project)
	{
		myProject = project;
	}

	public Element getState()
	{
		try
		{
			final Element e = new Element("state");
			writeExternal(e);
			return e;
		}
		catch(WriteExternalException e1)
		{
			LOG.error(e1);
			return null;
		}
	}

	public void loadState(Element state)
	{
		try
		{
			readExternal(state);
		}
		catch(InvalidDataException e)
		{
			LOG.error(e);
		}
	}

	public void initComponent()
	{
	}

	public void readExternal(Element parentNode) throws InvalidDataException
	{
		loadGlobalSettings(parentNode);
		myProperties.set(parentNode);
	}

	public void writeExternal(Element parentNode) throws WriteExternalException
	{
		DefaultJDOMExternalizer.writeExternal(this, parentNode);
		for(final AntBuildFile buildFile : ThermitConfiguration.getInstance(myProject).getBuildFiles())
		{
			Element element = new Element(BUILD_FILE);
			element.setAttribute(URL, buildFile.getVirtualFile().getUrl());
			((AntBuildFileBase) buildFile).writeWorkspaceProperties(element);
			parentNode.addContent(element);
		}
	}

	public static ThermitWorkspaceConfiguration getInstance(Project project)
	{
		return ServiceManager.getService(project, ThermitWorkspaceConfiguration.class);
	}

	public void loadFileProperties() throws InvalidDataException
	{
		final Element properties = myProperties.getAndSet(null);
		if(properties == null)
		{
			return;
		}
		for(final AntBuildFile buildFile : ThermitConfiguration.getInstance(myProject).getBuildFiles())
		{
			final Element fileElement = findChildByUrl(properties, buildFile.getVirtualFile().getUrl());
			if(fileElement == null)
			{
				continue;
			}
			((AntBuildFileBase) buildFile).readWorkspaceProperties(fileElement);
		}
	}

	public void loadFromProjectSettings(Element parentNode) throws InvalidDataException
	{
		loadGlobalSettings(parentNode);
	}

	private void loadGlobalSettings(Element parentNode) throws InvalidDataException
	{
		DefaultJDOMExternalizer.readExternal(this, parentNode);
	}

	@Nullable
	private static Element findChildByUrl(Element parentNode, String url)
	{
		List children = parentNode.getChildren(BUILD_FILE);
		for(final Object aChildren : children)
		{
			Element element = (Element) aChildren;
			if(Comparing.equal(element.getAttributeValue(URL), url))
				return element;
		}
		return null;
	}
}