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/*******************************************************************************
* Copyright (c) 2004, 2008 John Krasnay and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* John Krasnay - initial API and implementation
* Igor Jacy Lino Campista - Java 5 warnings fixed (bug 311325)
*******************************************************************************/
package org.eclipse.vex.ui.internal.config;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IncrementalProjectBuilder;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.vex.core.internal.dom.DocumentWriter;
import org.eclipse.vex.ui.internal.VexPlugin;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* Represents a Vex plugin project in the workspace.
*/
public class PluginProject extends ConfigSource {
public static final String PLUGIN_XML = "vex-plugin.xml"; //$NON-NLS-1$
private final IProject project;
public PluginProject(final IProject project) {
super(project.getName());
this.project = project;
}
@Override
public URL getBaseUrl() {
try {
return getProject().getLocation().toFile().toURL();
} catch (final MalformedURLException e) {
throw new AssertionError(e);
}
}
/**
* @return the IProject associated with this plugin project.
*/
public IProject getProject() {
return project;
}
public void build() {
try {
project.build(IncrementalProjectBuilder.FULL_BUILD, null);
} catch (final CoreException e) {
final String message = MessageFormat.format(Messages.getString("PluginProject.buildError"), //$NON-NLS-1$
new Object[] { project.getName() });
VexPlugin.getInstance().log(IStatus.ERROR, message, e);
}
}
public void load() throws CoreException {
checkProject();
parseConfigXml(null);
parseResources(null);
}
private void checkProject() {
if (!isOpenPluginProject(project))
throw new IllegalStateException(MessageFormat.format(Messages.getString("PluginProject.notPluginProject"), //$NON-NLS-1$
project.getName()));
}
public static boolean isOpenPluginProject(final IProject project) {
return project.isOpen() && hasPluginProjectNature(project);
}
public static boolean hasPluginProjectNature(final IProject project) {
try {
return project.isOpen() && project.hasNature(PluginProjectNature.ID);
} catch (final CoreException e) {
VexPlugin.getInstance().getLog().log(e.getStatus());
return false;
}
}
/**
* Re-parses the vex-plugin.xml file.
*/
public void parseConfigXml(final IBuildProblemHandler problemHandler) throws CoreException {
removeAllItems();
final Document document = parseConfigXmlDom(problemHandler);
if (document == null)
return;
final NodeList extensions = document.getElementsByTagName("extension"); //$NON-NLS-1$
for (int i = 0; i < extensions.getLength(); i++) {
final Element extensionElement = (Element) extensions.item(i);
final String extensionPointId = extensionElement.getAttribute("point"); //$NON-NLS-1$
final String id = extensionElement.getAttribute("id"); //$NON-NLS-1$
final String name = extensionElement.getAttribute("name"); //$NON-NLS-1$
final IConfigElement[] configElements = parseConfigElements(extensionElement);
try {
this.addItem(extensionPointId, id, name, configElements);
} catch (final IOException e) {
VexPlugin.getInstance().log(IStatus.ERROR, e.getMessage(), e);
}
}
}
private Document parseConfigXmlDom(final IBuildProblemHandler problemHandler) throws CoreException {
final IFile configXml = project.getFile(PLUGIN_XML);
final DocumentBuilder builder = createDocumentBuilder();
try {
final URL url = configXml.getLocation().toFile().toURL();
return builder.parse(url.toString());
} catch (final SAXParseException e) {
if (problemHandler != null) {
final BuildProblem problem = new BuildProblem(BuildProblem.SEVERITY_ERROR, configXml.getName(), e.getMessage(), e.getLineNumber());
problemHandler.foundProblem(problem);
return null;
} else {
VexPlugin.getInstance().log(IStatus.ERROR, MessageFormat.format("Cannot load {0}.", configXml.getFullPath()), e);
return null;
}
} catch (final SAXException e) {
VexPlugin.getInstance().log(IStatus.ERROR, MessageFormat.format("Cannot load {0}.", configXml.getFullPath()), e);
return null;
} catch (final IOException e) {
VexPlugin.getInstance().log(IStatus.ERROR, MessageFormat.format("Cannot load {0}.", configXml.getFullPath()), e);
return null;
}
}
private IConfigElement[] parseConfigElements(final Element extensionElement) {
final List<IConfigElement> result = new ArrayList<IConfigElement>();
final NodeList childList = extensionElement.getChildNodes();
for (int j = 0; j < childList.getLength(); j++) {
final Node child = childList.item(j);
if (child instanceof Element)
result.add(new DomConfigurationElement((Element) child));
}
return result.toArray(new IConfigElement[result.size()]);
}
private static DocumentBuilder createDocumentBuilder() {
try {
return DocumentBuilderFactory.newInstance().newDocumentBuilder();
} catch (final ParserConfigurationException e) {
throw new AssertionError(e);
} catch (final FactoryConfigurationError e) {
throw new AssertionError(e);
}
}
/**
* Writes this configuraton to the file vex-config.xml in the project.
*/
public void writeConfigXml() throws CoreException, IOException {
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final PrintWriter out = new PrintWriter(new OutputStreamWriter(baos, "utf-8")); //$NON-NLS-1$
final ConfigurationElement root = new ConfigurationElement("plugin"); //$NON-NLS-1$
for (final ConfigItem item : getAllItems()) {
final ConfigurationElement extElement = new ConfigurationElement("extension"); //$NON-NLS-1$
extElement.setAttribute("id", item.getSimpleId()); //$NON-NLS-1$
extElement.setAttribute("name", item.getName()); //$NON-NLS-1$
extElement.setAttribute("point", item.getExtensionPointId()); //$NON-NLS-1$
final IConfigItemFactory factory = getConfigItemFactory(item.getExtensionPointId());
if (factory != null) {
extElement.setChildren(factory.createConfigurationElements(item));
root.addChild(extElement);
}
}
writeElement(root, out, 0);
out.close();
final InputStream inputStream = new ByteArrayInputStream(baos.toByteArray());
final IFile file = getProject().getFile(PLUGIN_XML);
if (file.exists())
file.setContents(inputStream, true, false, null);
else
file.create(inputStream, true, null);
}
private static void writeElement(final IConfigElement element, final PrintWriter out, final int level) {
final StringBuffer elementIndent = new StringBuffer();
for (int i = 0; i < level; i++)
elementIndent.append(" "); //$NON-NLS-1$
final StringBuffer elementPrefix = new StringBuffer();
elementPrefix.append("<"); //$NON-NLS-1$
elementPrefix.append(element.getName());
final StringBuffer attributeIndent = new StringBuffer(elementIndent.toString());
for (int i = 0; i < elementPrefix.length() + 1; i++)
attributeIndent.append(" "); //$NON-NLS-1$
out.print(elementIndent.toString());
out.print(elementPrefix.toString());
final String[] attributeNames = element.getAttributeNames();
for (int i = 0; i < attributeNames.length; i++) {
final String attributeName = attributeNames[i];
if (i > 0) {
out.println();
out.print(attributeIndent);
} else
out.print(" "); //$NON-NLS-1$
out.print(attributeName);
out.print("=\""); //$NON-NLS-1$
out.print(DocumentWriter.escape(element.getAttribute(attributeName)));
out.print("\""); //$NON-NLS-1$
}
out.println(">"); //$NON-NLS-1$
final IConfigElement[] children = element.getChildren();
for (final IConfigElement element2 : children)
writeElement(element2, out, level + 1);
out.print(elementIndent);
out.print("</"); //$NON-NLS-1$
out.print(element.getName());
out.println(">"); //$NON-NLS-1$
}
}
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