SaxableEditorInput.java

/*******************************************************************************
 * Copyright (c) 2004, 2006
 * Thomas Hallgren, Kenneth Olwing, Mitch Sonies
 * Pontus Rydin, Nils Unden, Peer Torngren
 * The code, documentation and other materials contained herein have been
 * licensed under the Eclipse Public License - v 1.0 by the individual
 * copyright holders listed above, as Initial Contributors under such license.
 * The text of such license is available at www.eclipse.org.
 *******************************************************************************/
package org.eclipse.buckminster.ui.internal;

import java.io.IOException;
import java.io.InputStream;

import org.eclipse.buckminster.runtime.BuckminsterException;
import org.eclipse.buckminster.runtime.IOUtils;
import org.eclipse.buckminster.sax.ISaxable;
import org.eclipse.buckminster.sax.Utils;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.content.IContentDescription;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.IPersistableElement;
import org.eclipse.ui.IStorageEditorInput;
import org.eclipse.ui.PlatformUI;
import org.xml.sax.SAXException;

public abstract class SaxableEditorInput implements IStorageEditorInput {
	@Override
	public <T> T getAdapter(Class<T> adapter) {
		return null;
	}

	protected abstract ISaxable getContent() throws CoreException;

	public IContentDescription getContentDescription() {
		InputStream contents = null;
		try {
			contents = this.getStorage().getContents();
			return Platform.getContentTypeManager().getDescriptionFor(contents, this.getName(), IContentDescription.ALL);
		} catch (CoreException e) {
			throw new RuntimeException(e);
		} catch (IOException e) {
			throw new RuntimeException(e);
		} finally {
			IOUtils.close(contents);
		}
	}

	@Override
	public ImageDescriptor getImageDescriptor() {
		IContentDescription cd = this.getContentDescription();
		return PlatformUI.getWorkbench().getEditorRegistry().getImageDescriptor(this.getName(), cd.getContentType());
	}

	@Override
	public IPersistableElement getPersistable() {
		return null;
	}

	@Override
	public IStorage getStorage() throws CoreException {
		return new IStorage() {
			@Override
			public <T> T getAdapter(Class<T> adapter) {
				return null;
			}

			@Override
			public InputStream getContents() throws CoreException {
				try {
					return Utils.getInputStream(SaxableEditorInput.this.getContent());
				} catch (SAXException e) {
					throw BuckminsterException.wrap(e);
				}
			}

			@Override
			public IPath getFullPath() {
				return null;
			}

			@Override
			public String getName() {
				return SaxableEditorInput.this.getName();
			}

			@Override
			public boolean isReadOnly() {
				return true;
			}

		};
	}
}