ProjectTemplateStore.java

/*******************************************************************************
 * This file is part of the Symfony eclipse plugin.
 * 
 * (c) Robert Gruendler <r.gruendler@gmail.com>
 * 
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 ******************************************************************************/
package com.dubture.symfony.ui.viewsupport;


import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ProjectScope;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.text.templates.Template;
import org.eclipse.jface.text.templates.persistence.TemplatePersistenceData;
import org.eclipse.jface.text.templates.persistence.TemplateReaderWriter;
import org.eclipse.jface.text.templates.persistence.TemplateStore;
import org.eclipse.ui.preferences.ScopedPreferenceStore;

import com.dubture.symfony.ui.PreferenceConstants;
import com.dubture.symfony.ui.SymfonyUiPlugin;


/**
 * 
 * TemplateStore for the symfony projects. 
 * 
 * @author Robert Gründler <r.gruendler@gmail.com>
 *
 */
public class ProjectTemplateStore {
	
	private static final String KEY = PreferenceConstants.CODE_TEMPLATES_KEY; //$NON-NLS-1$

	private final TemplateStore fInstanceStore;
	private final TemplateStore fProjectStore;

	public ProjectTemplateStore(IProject project) {
		fInstanceStore = SymfonyUiPlugin.getDefault().getCodeTemplateStore();
		if (project == null) {
			fProjectStore = null;
		} else {
			final ScopedPreferenceStore projectSettings = new ScopedPreferenceStore(
					new ProjectScope(project), SymfonyUiPlugin.PLUGIN_ID);
			fProjectStore = new TemplateStore(projectSettings, KEY) {
				/*
				 * Make sure we keep the id of added code templates - add
				 * removes it in the usual add() method
				 */
				public void add(TemplatePersistenceData data) {
					internalAdd(data);
				}

				public void save() throws IOException {

					StringWriter output = new StringWriter();
					TemplateReaderWriter writer = new TemplateReaderWriter();
					writer.save(getTemplateData(false), output);

					projectSettings.setValue(KEY, output.toString());
					projectSettings.save();
				}
			};
		}
	}

	public static boolean hasProjectSpecificTempates(IProject project) {
		if (project == null) {
			return false;
		}
		String pref = new ProjectScope(project).getNode(SymfonyUiPlugin.PLUGIN_ID).get(
				KEY, null);
		if (pref != null && pref.trim().length() > 0) {
			Reader input = new StringReader(pref);
			TemplateReaderWriter reader = new TemplateReaderWriter();
			TemplatePersistenceData[] datas;
			try {
				datas = reader.read(input);
				return datas.length > 0;
			} catch (IOException e) {
				// ignore
			}
		}
		return false;
	}

	public TemplatePersistenceData[] getTemplateData() {
		if (fProjectStore != null) {
			return fProjectStore.getTemplateData(true);
		} else {
			return fInstanceStore.getTemplateData(true);
		}
	}

	public Template findTemplateById(String id) {
		Template template = null;
		if (fProjectStore != null)
			template = fProjectStore.findTemplateById(id);
		if (template == null)
			template = fInstanceStore.findTemplateById(id);

		return template;
	}

	public void load() throws IOException {
		if (fProjectStore != null) {
			fProjectStore.load();

			Set<String> datas = new HashSet<String>();
			TemplatePersistenceData[] data = fProjectStore
					.getTemplateData(false);
			for (int i = 0; i < data.length; i++) {
				datas.add(data[i].getId());
			}

			data = fInstanceStore.getTemplateData(false);
			for (int i = 0; i < data.length; i++) {
				TemplatePersistenceData orig = data[i];
				if (!datas.contains(orig.getId())) {
					TemplatePersistenceData copy = new TemplatePersistenceData(
							new Template(orig.getTemplate()), orig.isEnabled(),
							orig.getId());
					fProjectStore.add(copy);
					copy.setDeleted(true);
				}
			}
		}
	}

	public boolean isProjectSpecific(String id) {
		if (id == null) {
			return false;
		}

		if (fProjectStore == null)
			return false;

		return fProjectStore.findTemplateById(id) != null;
	}

	public void setProjectSpecific(String id, boolean projectSpecific) {
		Assert.isNotNull(fProjectStore);

		TemplatePersistenceData data = fProjectStore.getTemplateData(id);
		if (data == null) {
			return; // does not exist
		} else {
			data.setDeleted(!projectSpecific);
		}
	}

	public void restoreDefaults() {
		if (fProjectStore == null) {
			fInstanceStore.restoreDefaults();
		} else {
			fProjectStore.restoreDefaults();
		}
	}

	public void save() throws IOException {
		if (fProjectStore == null) {
			fInstanceStore.save();
		} else {
			fProjectStore.save();
		}
	}

	public void revertChanges() throws IOException {
		if (fProjectStore != null) {
			// nothing to do
		} else {
			fInstanceStore.load();
		}
	}

	public Template findTemplate(String templateName,
			String templateContextTypeId) {
		if (fProjectStore != null) {
			return fProjectStore.findTemplate(templateName,
					templateContextTypeId);
		} else {
			return fInstanceStore.findTemplate(templateName,
					templateContextTypeId);
		}

	}

	public Template[] getTemplates(String templateContextTypeId) {
		if (fProjectStore != null) {
			return fProjectStore.getTemplates(templateContextTypeId);
		} else {
			return fInstanceStore.getTemplates(templateContextTypeId);
		}
	}	

}