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/**
* Copyright (c) 2011, 2015 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Florian Pirchner - Initial implementation
*/
package org.eclipse.osbp.ecview.dsl.autowire.hook;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;
import org.eclipse.osbp.ecview.dsl.autowire.IAutowireDelegate;
import org.eclipse.osbp.ecview.dsl.derivedstate.UiModelDerivedStateComputerx;
import org.eclipse.osbp.ecview.semantic.uimodel.UiLayout;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.inject.Inject;
import com.google.inject.Injector;
/**
* Delegates autowirings to registered extensions. See extensionpoint
* "org.eclipse.osbp.ecview.dsl.autowireDelegate"
*/
public class ExtensionsAutowireDelegate implements IAutowireDelegate {
private static final String DEFAULT_IMPL_ID = "org.eclipse.osbp.ecview.dsl.autowireDelegate";
private static final Logger LOGGER = LoggerFactory
.getLogger(ExtensionsAutowireDelegate.class);
private static final String ATTR_ID = "id"; //$NON-NLS-1$
private static final String ATTR_AUTOWIREHOOK = "autowireDelegateClass"; //$NON-NLS-1$
private static final String AUTOWIRE_HOOK_EXTPT = "autowireDelegate"; //$NON-NLS-1$
@Inject
private Injector injector;
private IAutowireDelegate delegate;
@Override
public void autowire(UiLayout uiLayout,
UiModelDerivedStateComputerx computer, boolean mobile) {
ensureExtention();
if (delegate != null) {
delegate.autowire(uiLayout, computer, mobile);
}
}
private void ensureExtention() {
if (delegate != null) {
return;
}
IExtensionRegistry registry = Platform.getExtensionRegistry();
IExtensionPoint point = registry.getExtensionPoint(
"org.eclipse.osbp.ecview.dsl", AUTOWIRE_HOOK_EXTPT);
if (point == null) {
return;
}
IConfigurationElement bestMatch = null;
String bestMatchId = null;
IExtension[] extensions = point.getExtensions();
for (int i = 0; i < extensions.length; i++) {
IConfigurationElement[] elements = extensions[i]
.getConfigurationElements();
for (int j = 0; j < elements.length; j++) {
String _id = elements[j].getAttribute(ATTR_ID);
if (bestMatchId == null) {
bestMatchId = _id;
bestMatch = elements[j];
if (!bestMatchId.equals(DEFAULT_IMPL_ID)) {
// if not the default impl, it is a better match and use
// it
break;
} else {
// wait for better match
}
} else {
if (!_id.equals(DEFAULT_IMPL_ID)) {
// if not the default impl, it is a better match and use
// it
bestMatchId = _id;
bestMatch = elements[j];
break;
}
}
}
}
if (bestMatch != null) {
try {
delegate = (IAutowireDelegate) bestMatch
.createExecutableExtension(ATTR_AUTOWIREHOOK);
injector.injectMembers(delegate);
} catch (CoreException e) {
LOGGER.error("{}", e);
}
}
}
}
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