gov.nih.nci.cabig.caaers.web.table.SortRowsCallbackImpl.java Source code

Introduction

Here is the source code for gov.nih.nci.cabig.caaers.web.table.SortRowsCallbackImpl.java

Source

/*******************************************************************************
 * Copyright SemanticBits, Northwestern University and Akaza Research
 * 
 * Distributed under the OSI-approved BSD 3-Clause License.
 * See http://ncip.github.com/caaers/LICENSE.txt for details.
 ******************************************************************************/
package gov.nih.nci.cabig.caaers.web.table;

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

import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.comparators.ReverseComparator;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.extremecomponents.table.callback.NullSafeBeanComparator;
import org.extremecomponents.table.callback.SortRowsCallback;
import org.extremecomponents.table.core.TableConstants;
import org.extremecomponents.table.core.TableModel;
import org.extremecomponents.table.limit.Sort;

/**
 * @author
 */

public class SortRowsCallbackImpl implements SortRowsCallback {

    private static Log logger = LogFactory.getLog(SortRowsCallbackImpl.class);

    public Collection sortRows(TableModel model, Collection rows) throws Exception {
        boolean sorted = model.getLimit().isSorted();

        if (!sorted) {
            return rows;
        }

        Sort sort = model.getLimit().getSort();
        String property = sort.getProperty();
        String sortOrder = sort.getSortOrder();

        if (StringUtils.contains(property, ".")) {
            try {
                if (sortOrder.equals(TableConstants.SORT_ASC)) {
                    Collections.sort((List) rows, new NullSafeBeanComparator(property, new NullStringComparator()));
                } else if (sortOrder.equals(TableConstants.SORT_DESC)) {
                    NullSafeBeanComparator reversedNaturalOrderBeanComparator = new NullSafeBeanComparator(property,
                            new ReverseComparator(new NullStringComparator()));
                    Collections.sort((List) rows, reversedNaturalOrderBeanComparator);
                }
            } catch (NoClassDefFoundError e) {
                String msg = "The column property [" + property
                        + "] is nested and requires BeanUtils 1.7 or greater for proper sorting.";
                logger.error(msg);
                throw new NoClassDefFoundError(msg); //just rethrow so it is not hidden
            }
        } else {
            if (sortOrder.equals(TableConstants.SORT_ASC)) {
                BeanComparator comparator = new BeanComparator(property, new NullStringComparator());
                Collections.sort((List) rows, comparator);
            } else if (sortOrder.equals(TableConstants.SORT_DESC)) {
                BeanComparator reversedNaturalOrderBeanComparator = new BeanComparator(property,
                        new ReverseComparator(new NullStringComparator()));
                Collections.sort((List) rows, reversedNaturalOrderBeanComparator);
            }
        }

        return rows;
    }

}