1 files changed, 129 insertions, 0 deletions
diff --git a/jaxb/plugins/org.eclipse.jpt.jaxb.core/src/org/eclipse/jpt/jaxb/core/internal/resource/AbstractJaxbFileResourceModel.java b/jaxb/plugins/org.eclipse.jpt.jaxb.core/src/org/eclipse/jpt/jaxb/core/internal/resource/AbstractJaxbFileResourceModel.java
new file mode 100644
index 0000000000..82237263e9
--- /dev/null
+++ b/jaxb/plugins/org.eclipse.jpt.jaxb.core/src/org/eclipse/jpt/jaxb/core/internal/resource/AbstractJaxbFileResourceModel.java
@@ -0,0 +1,129 @@
+/*******************************************************************************
+ * Copyright (c) 2012 Oracle. 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:
+ *     Oracle - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jpt.jaxb.core.internal.resource;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import org.eclipse.core.resources.IFile;
+import org.eclipse.jdt.core.IJavaElement;
+import org.eclipse.jdt.core.IPackageFragment;
+import org.eclipse.jdt.core.JavaCore;
+import org.eclipse.jpt.common.core.JptResourceModel;
+import org.eclipse.jpt.common.core.JptResourceModelListener;
+import org.eclipse.jpt.common.utility.internal.ListenerList;
+import org.eclipse.jpt.common.utility.internal.StringTools;
+import org.eclipse.jpt.jaxb.core.JptJaxbCorePlugin;
+
+public abstract class AbstractJaxbFileResourceModel<S>
+	implements JptResourceModel
+{
+	protected final IFile file;
+
+	/**
+	 * This is <code>null</code> if there is no package name.
+	 */
+	protected final String packageName;
+
+	protected final S state;
+
+	protected final ListenerList<JptResourceModelListener> resourceModelListenerList =
+			new ListenerList<JptResourceModelListener>(JptResourceModelListener.class);
+
+
+	protected AbstractJaxbFileResourceModel(IFile file) {
+		super();
+		if (file == null) {
+			throw new NullPointerException();
+		}
+		this.file = file;
+		this.packageName = this.buildPackageName();
+		this.state = this.buildState();
+		this.load();
+	}
+
+	protected String buildPackageName() {
+		String pkg = this.buildPackageName_();
+		return StringTools.stringIsEmpty(pkg) ? null : pkg;
+	}
+
+	protected String buildPackageName_() {
+		IJavaElement javaElement = JavaCore.create(this.file.getParent());
+		if ((javaElement != null) && (javaElement.getElementType() == IJavaElement.PACKAGE_FRAGMENT)) {
+			return ((IPackageFragment) javaElement).getElementName();
+		}
+		return null;
+	}
+
+	protected abstract S buildState();
+
+	public String getPackageName() {
+		return this.packageName;
+	}
+
+	protected void reload() {
+		this.load();
+	}
+
+	protected void load() {
+		InputStream stream = null;
+		try {
+			stream = this.file.getContents();
+			if (stream != null) {
+				this.load(new BufferedInputStream(stream));
+			}
+		} catch (Exception ex) {
+			JptJaxbCorePlugin.log(ex);
+		} finally {
+			this.closeStream(stream);
+		}
+	}
+
+	/**
+	 * The specified stream is not <code>null</code>.
+	 */
+	protected abstract void load(InputStream stream) throws IOException;
+
+	protected void closeStream(InputStream stream) {
+		try {
+			if (stream != null) {
+				stream.close();
+			}
+		} catch (IOException ex) {
+			JptJaxbCorePlugin.log(ex);
+		}
+	}
+
+	public void update() {
+		this.reload();
+		this.resourceModelChanged();
+	}
+
+
+	// ********** JptResourceModel implementation **********
+
+	public IFile getFile() {
+		return this.file;
+	}
+
+	public void addResourceModelListener(JptResourceModelListener listener) {
+		this.resourceModelListenerList.add(listener);
+	}
+
+	public void removeResourceModelListener(JptResourceModelListener listener) {
+		this.resourceModelListenerList.remove(listener);
+	}
+
+	protected void resourceModelChanged() {
+		for (JptResourceModelListener listener : this.resourceModelListenerList.getListeners()) {
+			listener.resourceModelChanged(this);
+		}
+	}
+}