Table Sorting?

[Former Member]

Hi friends,

I want some sample coding for Table sorting which i need to sort by Employee names...

Useful answers will be appreciated..

GS

[Former Member]

Hi All,

Follow are the squential steps to add the table Sorter

1. Copy the Table Sorter in the Packages folder ( u can create the additional package also).

2.Say the Package under which it has been placed is com.sap.tablesorter then in the starting of the code correct the package name correctly,

2. Navigate to the view and create a context as <b>TableSorter</b> ,

3.From the Context Property choose browse , Select java Native Type and search for TableSorter ( If this is the name of the java file).

4.Click on ok ( Note in the Context property u shd see <apackage-name>.TableSorter ).

5. Create an Action say getsort

6.Copy the following code in

<b>public static void wdDoModifyView(IPrivateSiteMetricsReportView wdThis, IPrivateSiteMetricsReportView.IContextNode wdContext, com.sap.tc.webdynpro.progmodel.api.IWDView view, boolean firstTime)</b>
if (firstTime) {
  IWDTable table = (IWDTable) view.getElement("<TABLE ID>");
  wdContext.currentContextElement().setTableSorter(	new TableSorter(table, wdThis.wdGetSortAction(), null, null));			
			}

public void onActionsort(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
  {
    //@@begin onActionsort(ServerEvent)
	wdContext.currentContextElement().getTableSorter().sort(wdEvent,<NODE NAME>);
	wdContext.nodeReportList().setLeadSelection(0);
    //@@end
  }

For more details you can refer to the following blog

/people/bertram.ganz/blog/2006/03/07/enhanced-web-dynpro-java-tablesorter-for-sap-netweaver-04s

Thanks

Pankaj

[Former Member]

Hi,

I have already imported Table Sorter into my webdynpro project.

project - import - zipfile . (into project-src-packages-com-Table Sorter).

In the code it shows that (com.sap.tc.webdynpro.tests.utils.TableSorter cannot be resolved error). Please Let me know how to fix it.

Regards,

Divya

[Former Member]

Wher i can get tht TableSorter.java.

I cant find it in Java Native Type library..

GS

[Former Member]

Hi,

https://www.sdn.sap.com/irj/sdn/softwaredownload?download=/irj/servlet/prt/portal/prtroot/com.sap.km...

Regards

Ayyapparaj

[Former Member]

Hi ,

TableSorter.java code is here.

create a java file in ur WD project in ur pacakages folder. let it be in subfolde 'com' of ur project's packages folder.

then code is

package com;

import java.sql.Date;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.StringTokenizer;

import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDAbstractDropDownByIndex;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDAbstractDropDownByKey;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDAbstractInputField;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDAbstractTableColumn;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDCaption;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDCheckBox;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDLink;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDProgressIndicator;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDRadioButton;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDTable;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDTableCellEditor;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDTableColumn;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDTableColumnGroup;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDTextEdit;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDTextView;
import com.sap.tc.webdynpro.clientserver.uielib.standard.api.WDTableColumnSortDirection;
import com.sap.tc.webdynpro.progmodel.api.IWDAction;
import com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent;
import com.sap.tc.webdynpro.progmodel.api.IWDNode;
import com.sap.tc.webdynpro.progmodel.api.IWDNodeElement;
import com.sap.tc.webdynpro.progmodel.api.IWDViewElement;
import com.sap.tc.webdynpro.services.sal.localization.api.WDResourceHandler;

/**
 * Helper class that makes a Web Dynpro table UI element sortable (column-wise).
 */
public final class TableSorter {
	/**
	 * @param table
	 * @param sortAction
	 * @param comparators
	 */
	
	/**
	 * Creates a table sorter for the given table using the given sort action.
	 * This constructor must be called from <code>wdDoModifyView()</code>, but
	 * usually only when that hook is called for the first time. Store the newly
	 * created instance in a context attribute with Java native type
	 * <code>com.sap.tc.webdynpro.tests.utils.TableSorter</code>.
	 * The given sort action's event handler will be bound to the <code>onSort</code>
	 * event of the table and must at least call this table sorter's
	 * <code>sort(wdEvent)</code> method.
	 * 
	 * Every column of the table is made sortable if possible according to the
	 * following rules.
	 * If a comparator is given for a column's ID and it is a
	 * <code>NodeElementByAttributeComparator</code>, then that comparator defines
	 * both the attribute and the ordering used to sort that column.
	 * If any other comparator is given and an attribute can be determined from
	 * that column's table cell editor, then that attribute is used to sort that
	 * column according to the ordering imposed by the given comparator.
	 * If no comparator is given but an attribute can be determined from
	 * that column's table cell editor, then that attribute is used to sort that
	 * column according to the natural ordering of that attribute's type.
	 * Else that column is left untouched.
	 * 
	 * Additionally it is possible to define the sortable columns by their 
	 * TableColumn UI element ids.
	 * 
	 * @see sort()
	 * @see NodeElementByAttributeComparator
	 * @see com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDTable
	 */
	public TableSorter(IWDTable table, IWDAction sortAction, Map comparators) {
		init(table, sortAction, comparators, null);
	}
	
	public TableSorter(IWDTable table, IWDAction sortAction, Map comparators, String[] sortableColumns) {
		init(table, sortAction, comparators, sortableColumns);
	}
	
	/**
	 * Initialisation stuff
	 */
	private void init(IWDTable table, IWDAction sortAction, Map comparators, String[] sortableColumns){
		this.table = table;
		if(sortableColumns == null){
			sortableCols = null;
		}else{
			sortableCols = new HashMap();
			for (int i = 0; i < sortableColumns.length; i++) {
				sortableCols.put(sortableColumns<i>, sortableColumns<i>);
			}
		}

		// sanity checks
		if (sortAction == null)
			throw new IllegalArgumentException("Sort action must be given");
		if (table == null)
			throw new IllegalArgumentException("Table must be given");
		if (table.bindingOfDataSource() == null)
			throw new IllegalArgumentException(
				"Data source of table with id '" + table.getId() + "' must be bound");

		// make the columns sortable
		String dataSourcePrefix = table.bindingOfDataSource() + ".";
		//TODO: remove the following line since this method is not longer available in later releases
		setComparatorsForColumns(dataSourcePrefix, table.iterateColumns(), comparators);
		setComparatorsForColumns(dataSourcePrefix, table.iterateGroupedColumns(), comparators);
		
		//set up the table properties
		table.setOnSort(sortAction);
		table.mappingOfOnSort().addSourceMapping(IWDTable.IWDOnSort.COL, "selectedColumn");
		table.mappingOfOnSort().addSourceMapping(IWDTable.IWDOnSort.DIRECTION, "sortDirection");	
	}
	
	/**
	 * Try to make the given columns sortable (recusivly, if necessary)
	 */
	private void setComparatorsForColumns(String dataSourcePrefix, Iterator columnIterator, Map comparators){
		int index = 0;
		for (Iterator it = columnIterator; it.hasNext(); ++index) { // for every column: try to make it bindable
			IWDAbstractTableColumn abstractColumn = (IWDAbstractTableColumn) it.next();
			if(abstractColumn instanceof IWDTableColumn){
				
				IWDTableColumn column = (IWDTableColumn)abstractColumn;
				if(sortableCols == null || sortableCols.containsKey(column.getId())){
					//try to make this column sortable
					Comparator comparator = null;
					if (comparators != null){
						comparator = (Comparator)comparators.get(column.getId());
					}
					
					NodeElementByAttributeComparator elementComparator = null;	
					if (comparator instanceof NodeElementByAttributeComparator) {
						// the easy one, attribute and ordering are given
						elementComparator = (NodeElementByAttributeComparator)comparator;
					} else { // attribute must be determined
						String bindingOfPrimaryProperty = bindingOfPrimaryProperty(column.getTableCellEditor());
						if (bindingOfPrimaryProperty == null || !bindingOfPrimaryProperty.startsWith(dataSourcePrefix)){
							//no attribute found or outside of data source
							column.setSortState(WDTableColumnSortDirection.NOT_SORTABLE);
							continue;
						}
						String attributeName = bindingOfPrimaryProperty.substring(dataSourcePrefix.length());
						Collection subnodes = new ArrayList();
						if (attributeName.indexOf('.') >= 0){
							//attribute not immediately below data source
							String[] tokens = tokenize (attributeName, ".");
							for(int i=0; i<tokens.length-1; i++){
								subnodes.add(tokens<i>);
							}
							attributeName = tokens[tokens.length-1];
						}
						if(subnodes.size() == 0){
							elementComparator = new NodeElementByAttributeComparator(attributeName, comparator);
						}else{
							elementComparator = new NodeElementByAttributeComparator(attributeName, comparator, subnodes);
						}
					}
		
					// set up internal data structures
					comparatorForColumn.put(column, elementComparator);
					
					//set sort state
					column.setSortState(WDTableColumnSortDirection.NONE);
				}else{
					//column should not be sortable
					column.setSortState(WDTableColumnSortDirection.NOT_SORTABLE);
				}
				
			}else if (abstractColumn instanceof IWDTableColumnGroup){
				//it's just a column group -> try to bind the columns of the column group
				IWDTableColumnGroup columnGroup = (IWDTableColumnGroup)abstractColumn;
				setComparatorsForColumns(dataSourcePrefix, columnGroup.iterateColumns(), comparators);
			}
			
		}		
	}
	
	/**
	 * Tokenizes the input string according to the given delimiters. The delimiters will be left out.
	 * Example: tokenize("Hello_World", "_") results ["Hello", "World"]
	 */
	private String[] tokenize (String input, String delim){
		StringTokenizer tokenizer = new StringTokenizer(input, delim);
		String[] tokens = new String[tokenizer.countTokens()];
		int index = 0;
		while(tokenizer.hasMoreTokens()){
			tokens[index] = tokenizer.nextToken();
			index++;
		}
		return tokens;
	}

	/**
	 * This method must be called from the event handler of this table sorter's
	 * sort action. It performs the actual sort operation.
	 */
	public void sort(IWDCustomEvent wdEvent, IWDNode dataSource) {
		// find the things we need
		String columnId = wdEvent.getString("selectedColumn");
		String direction = wdEvent.getString("sortDirection");
		IWDTableColumn column = (IWDTableColumn) table.getView().getElement(columnId);
		NodeElementByAttributeComparator elementComparator = (NodeElementByAttributeComparator) comparatorForColumn.get(column);
		
		if (elementComparator == null){
			//not a sortable column
			column.setSortState(WDTableColumnSortDirection.NOT_SORTABLE);
			return; 
		}
		
		// sorting
		elementComparator.setSortDirection(WDTableColumnSortDirection.valueOf(direction));
		dataSource.sortElements(elementComparator);
	}

	/**
	 * Returns the binding of the given table cell editor's property that is
	 * considered "primary" or <code>null</code> if no such binding exists or no
	 * such property can be determined.
	 */
	private static final String bindingOfPrimaryProperty(IWDTableCellEditor editor) {
		return editor instanceof IWDViewElement ? bindingOfPrimaryProperty((IWDViewElement) editor) : null;
	}

	/**
	 * Returns the binding of the given view element's property that is
	 * considered "primary" or <code>null</code> if no such binding exists or no
	 * such property can be determined.
	 */
	private static final String bindingOfPrimaryProperty(IWDViewElement element) {
		if (element instanceof IWDAbstractDropDownByIndex)
			return ((IWDAbstractDropDownByIndex) element).bindingOfTexts();
		if (element instanceof IWDAbstractDropDownByKey)
			return ((IWDAbstractDropDownByKey) element).bindingOfSelectedKey();
		if (element instanceof IWDAbstractInputField)
			return ((IWDAbstractInputField) element).bindingOfValue();
		if (element instanceof IWDCaption)
			return ((IWDCaption) element).bindingOfText();
		if (element instanceof IWDCheckBox)
			return ((IWDCheckBox) element).bindingOfChecked();
		if (element instanceof IWDLink)
			return ((IWDLink) element).bindingOfText();
		if (element instanceof IWDProgressIndicator)
			return ((IWDProgressIndicator) element).bindingOfPercentValue();
		if (element instanceof IWDRadioButton)
			return ((IWDRadioButton) element).bindingOfSelectedKey();
		if (element instanceof IWDTextEdit)
			return ((IWDTextEdit) element).bindingOfValue();
		if (element instanceof IWDTextView)
			return ((IWDTextView) element).bindingOfText();

		return null;
	}

	/**
	 * Instance of a comparator according to the ordering imposed by the
	 * implementation of <code>Comparable</code>.
	 */
	private static final Comparator DEFAULT = new Comparator() {
		/**
		 * Compares the given objects according to the ordering imposed by the first
		 * ones <code>compareTo(Object)</code> function. Furthermore, <code>null</code>
		 * is treated to be less than any object.
		 * 
		 * @see java.lang.Comparable#compareTo(java.lang.Object)
		 * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
		 */
		public int compare(Object o1, Object o2) {
			if (o1 == null && o2 == null)
				return 0;
			if (o1 == null)
				return -1;
			if (o2 == null)
				return +1;
			if (o1 instanceof Boolean && o2 instanceof Boolean)
				return o1.toString().compareTo(o2.toString()); // false < true
			if (o1 instanceof String && o2 instanceof String){
				//Use a Collator for sorting according to the given Locale
				Collator collate = Collator.getInstance(WDResourceHandler.getCurrentSessionLocale());
				return collate.compare(o1, o2);				
			}
			return ((Comparable) o1).compareTo((Comparable) o2);
		}
	};

	/**
	 * Map of table column to comparator (<code>ReversableComparator</code>)
	 * used for sorting that column (sortable columns only).
	 */
	private Map comparatorForColumn = new HashMap();

	/**
	 * The table to be sorted.
	 */
	private IWDTable table = null;
	
	/**
	 * Column-IDs of the columns, which should be sortable
	 */
	private Map sortableCols = null;

	/**
	 * Generic comparator that compares node elements by a given attribute with
	 * the help of a given comparator.
	 */
	public final class NodeElementByAttributeComparator implements Comparator {
		
		
		/**
		 * Creates a new comparator for the given attribute name that compares values
		 * of that attribute according to the natural ordering of that attribute's
		 * type (which must implement <code>java.lang.Comparable</code>).
		 */
		public NodeElementByAttributeComparator(String attributeName) {
			this(attributeName, null, false, new ArrayList());
		}

		/**
		 * Creates a new comparator for the given attribute name that compares values
		 * of that attribute with the help of the given comparator. If no comparator
		 * is given, the natural ordering of that attribute's type is used.
		 */
		public NodeElementByAttributeComparator(String attributeName, Comparator comparator) {
			this(attributeName, comparator, false, new ArrayList());
		}

		/**
		 * Creates a new comparator for the given attribute name that compares values
		 * of that attribute either as objects (i.e. "in internal format") or as text
		 * (i.e. "in external format") as indicated. The ordering is the natural
		 * ordering of that attribute's type (which must implement
		 * <code>java.lang.Comparable</code>) in case objects are compared or the
		 * natural ordering of <code>java.lang.String</code> in case texts are compared.
		 */
		public NodeElementByAttributeComparator(String attributeName, boolean compareAsText) {
			this(attributeName, null, compareAsText, new ArrayList());
		}
		
		/**
		 * Creates a new comparator for the given attribute name that compares values
		 * of that attribute according to the natural ordering of that attribute's
		 * type (which must implement <code>java.lang.Comparable</code>). In addition it is possible 
		 * to define the path to a child node with the <code>java.util.Collection</code> subnodes.
		 * (List of child node names in the correct order)
		 */
		public NodeElementByAttributeComparator(String attributeName, Collection subnodes) {
			this(attributeName, null, false, subnodes);
		}

		/**
		 * Creates a new comparator for the given attribute name that compares values
		 * of that attribute with the help of the given comparator. If no comparator
		 * is given, the natural ordering of that attribute's type is used. In addition it is possible 
		 * to define the path to a child node with the <code>java.util.Collection</code> subnodes.
		 * (List of child node names in the correct order)
		 */
		public NodeElementByAttributeComparator(String attributeName, Comparator comparator, Collection subnodes) {
			this(attributeName, comparator, false, subnodes);
		}

		/**
		 * Creates a new comparator for the given attribute name that compares values
		 * of that attribute either as objects (i.e. "in internal format") or as text
		 * (i.e. "in external format") as indicated. The ordering is the natural
		 * ordering of that attribute's type (which must implement
		 * <code>java.lang.Comparable</code>) in case objects are compared or the
		 * natural ordering of <code>java.lang.String</code> in case texts are compared. In addition it is possible 
		 * to define the path to a child node with the <code>java.util.Collection</code> subnodes.
		 * (List of child node names in the correct order)
		 */
		public NodeElementByAttributeComparator(String attributeName, boolean compareAsText, Collection subnodes) {
			this(attributeName, null, compareAsText, subnodes);
		}

		/**
		 * Internal constructor.
		 */
		private NodeElementByAttributeComparator(
			String attributeName,
			Comparator comparator,
			boolean compareAsText,
			Collection subNodes) {
			if (attributeName == null)
				throw new IllegalArgumentException("Attribute name must not be null");
			if (comparator == null)
				comparator = DEFAULT;

			this.attributeName = attributeName;
			this.comparator = comparator;
			this.compareAsText = compareAsText;
			this.sortDirection = true;
			this.subNodes = subNodes;
		}
		
		/**
		 * Sets the sort direction of this comparator to the given direction. The comparator sort in ascending order by default.
		 * @see com.sap.tc.webdynpro.clientserver.uielib.standard.api.WDTableColumnSortDirection
		 */
		public void setSortDirection(WDTableColumnSortDirection direction){
			if(direction.equals(WDTableColumnSortDirection.UP)){
				sortDirection = true;
			}else if(direction.equals(WDTableColumnSortDirection.DOWN)){
				sortDirection = false;
			}
		}

		/**
		 * Compares the given objects which must be instances of <code>IWDNodeElement</code>
		 * according to the values of the attribute given at construction time
		 * with the help of the comparator given at construction time.
		 * 
		 * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
		 * @see com.sap.tc.webdynpro.progmodel.api.IWDNodeElement
		 */
		public int compare(Object o1, Object o2) {
			IWDNodeElement element1 = (IWDNodeElement) o1;
			IWDNodeElement element2 = (IWDNodeElement) o2;
			if(subNodes.size() > 0){
				element1 = getSubNodeElement(element1, 0);
				element2 = getSubNodeElement(element2, 0);
			}
			Object attributeValue1 = null;
			Object attributeValue2 = null;
			if(element1 != null){
				attributeValue1 =
					compareAsText
						? element1.getAttributeAsText(attributeName)
						: element1.getAttributeValue(attributeName);
			}
			if(element2 != null){
				attributeValue2 =
					compareAsText
						? element2.getAttributeAsText(attributeName)
						: element2.getAttributeValue(attributeName);
			}

			if(sortDirection){
				return comparator.compare(attributeValue1, attributeValue2);
			}else{
				return comparator.compare(attributeValue2, attributeValue1);
			}
		}
		
		/**
		 * Determines recursivly the child node, which have an attribute with the given name.
		 * The path to this child node must be specified in the subnodes property of this comparator.
		 * Start this method with index = 0.
		 */
		private IWDNodeElement getSubNodeElement(IWDNodeElement currentElement, int index){
			if(currentElement == null || index >= subNodes.size()){
				//end of recursion
				return currentElement;
			}else{
				return getSubNodeElement(currentElement.node().getChildNode((String)subNodes.toArray()[index], currentElement.index()).getCurrentElement(), index+1);
				//return getSubNodeElement(currentElement.node().getChildNode((String)subNodes.toArray()[index], currentElement.index()).getElementAt(0), index+1);
			}
		}

		/**
		 * Name of the attribute used for comparisons.
		 */
		private final String attributeName;

		/**
		 * Comparator used for comparing the attribute's values.
		 */
		private final Comparator comparator;

		/**
		 * Indicates whether attribute values are compared as text (as opposed to
		 * "as objects").
		 */
		private final boolean compareAsText;
		
		/**
		 * Sort direction (true = ascending order, false = descending order)
		 */
		private boolean sortDirection;
		
		/**
		 * List of child node names
		 * (Description of the path from the given context node to the specified attribute)
		 */
		private Collection subNodes;
	}

}

thanks smitha

[Former Member]

hi

Check this

Thanks

Smitha

[Former Member]

Hi,

use the tablesorter utility.

Chk this link

/people/peter.vignet/blog/2007/01/03/generic-web-dynpro-java-table-filter

/people/bertram.ganz/blog/2006/03/07/enhanced-web-dynpro-java-tablesorter-for-sap-netweaver-04s

Regards

Ayyapparaj