org.caleydo.view.info.dataset.internal.DataSetItems.java Source code

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Here is the source code for org.caleydo.view.info.dataset.internal.DataSetItems.java

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/*******************************************************************************
 * Caleydo - Visualization for Molecular Biology - http://caleydo.org
 * Copyright (c) The Caleydo Team. All rights reserved.
 * Licensed under the new BSD license, available at http://caleydo.org/license
 *******************************************************************************/
package org.caleydo.view.info.dataset.internal;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.caleydo.core.util.ExtensionUtils;
import org.caleydo.core.util.ExtensionUtils.IExtensionLoader;
import org.caleydo.core.util.collection.Pair;
import org.caleydo.view.info.dataset.spi.IDataSetItem;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;

import com.google.common.collect.Lists;

/**
 * @author Samuel Gratzl
 *
 */
public class DataSetItems {
    private DataSetItems() {

    }

    public static Collection<IDataSetItem> create() {
        List<Pair<IDataSetItem, Integer>> items = ExtensionUtils.loadExtensions("org.caleydo.view.info.DataSetItem",
                new ExtensionLoader());
        items = new ArrayList<>(items); // mutable copy
        Collections.sort(items, Pair.<Integer>compareSecond());
        return Lists.transform(items, Pair.<IDataSetItem, Integer>mapFirst());
    }

    private static class ExtensionLoader implements IExtensionLoader<Pair<IDataSetItem, Integer>> {

        @Override
        public Pair<IDataSetItem, Integer> load(IConfigurationElement elem) throws CoreException {
            Object t = elem.createExecutableExtension("class");
            if (!(t instanceof IDataSetItem))
                return null;
            String order = elem.getAttribute("order");
            if (!StringUtils.isNumeric(order))
                order = "10";
            int order_i = Integer.parseInt(order);
            return Pair.make((IDataSetItem) t, order_i);
        }

    }
}