core/plugins/org.eclipse.dltk.validators.ui/src/org/eclipse/dltk/validators/ui/ValidatorConsoleTrackerManager.java

/*******************************************************************************
 * Copyright (c) 2005, 2017 IBM Corporation and others.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 *******************************************************************************/
package org.eclipse.dltk.validators.ui;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.Platform;
import org.eclipse.dltk.core.DLTKCore;
import org.eclipse.dltk.validators.internal.ui.ValidatorsUI;
import org.eclipse.ui.console.IPatternMatchListener;

public class ValidatorConsoleTrackerManager {

	private final static String EXTPOINT = ValidatorsUI.PLUGIN_ID
			+ ".validatorConsoleTracker"; //$NON-NLS-1$

	private static List<IPatternMatchListener> listeners;

	private static void initialize() throws CoreException {
		if (listeners != null) {
			return;
		}

		listeners = new ArrayList<>(5);
		IConfigurationElement[] cfg = Platform.getExtensionRegistry()
				.getConfigurationElementsFor(EXTPOINT);

		for (int i = 0; i < cfg.length; i++) {
			IPatternMatchListener listener = (IPatternMatchListener) cfg[i]
					.createExecutableExtension("class"); //$NON-NLS-1$
			listeners.add(listener);
		}
	}

	public static IPatternMatchListener[] getListeners() {
		try {
			initialize();
		} catch (CoreException e) {
			if (DLTKCore.DEBUG) {
				e.printStackTrace();
			}
			return null;
		}
		return listeners.toArray(new IPatternMatchListener[listeners.size()]);
	}
}