Table Sorter Error

[Former Member]

Hi ,

I have a table , which i need to sort by it collumns. When i tried to create a value attribute 'tablesorter' of type 'com.sap.tc.webdynpro.tests.utils' . I couldn't get the TableSorter class in Java Native type.Then I created a jar file n created a folder 'com.sap.tc.webdynpro.tests.utils' and I've put my TableSorter.jar in it. Then I added to my java build path. Then I wrote the correspongding code in modify n also in ActionSort() (as given in the tutorial). When i tried deploying it , the following error occurs...

*****************************error***********************************************

The initial exception that caused the request to fail, was:

com.sap.tc.webdynpro.services.exceptions.TypeNotFoundException: type java:com.sap.tc.webdynpro.tests.utils.TableSorter not found

at com.sap.tc.webdynpro.services.datatypes.core.DataTypeBroker.getDataType(DataTypeBroker.java:224)

at com.sap.tc.webdynpro.progmodel.context.DataAttributeInfo.init(DataAttributeInfo.java:318)

at com.sap.tc.webdynpro.progmodel.context.NodeInfo.initUnmappedAttributes(NodeInfo.java:687)

at com.sap.tc.webdynpro.progmodel.context.DataNodeInfo.doInit(DataNodeInfo.java:238)

at com.sap.tc.webdynpro.progmodel.context.NodeInfo.init(NodeInfo.java:671)

... 33 more

****************************************************************************

Can u tell me the way to put the TableSorter functuality in my table?

Thanks,

Shiny

[Former Member · Accepted solution]

Siddharth,

I tried by removing the jar file n just putting the code for TableSorter.java. but it didnt help. I got the errors while building itself.It is not able to find TableSorter in Java native type.

Thanks,

Shiny

[sid_sunny · Accepted solution]

Hi Shiny,

Were you able to create a value attribute of type TableSorter in your Web Dynpro Project.

Regards

Sid

[Former Member · Accepted solution]

Hi Siddarth,

Iam writting on behalf of Shiny as we are working together in developing that application.

We are able to create a value attribute of type TableSorter and the application got deployed successfully without any errors as well. But, during execution its not able to find that class and throwing that error.

Where are we going wrong exactly? Thank you very much for your help.

Regards,

Venkat

[Former Member · Accepted solution]

Hi,Venkat

Follow this thread

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

Regards,

Michael

[Former Member]

Thanks Everybody ....it worked....Given reward points for ur suggestions......

[sid_sunny]

Hi Shiny,

Dont create jar file just create a java file the code of tablesorter.java for NW04s is as below:

<b>

package com.sap.tc.webdynpro.tests.utils;

import java.util.Comparator;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

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.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.IWDTextEdit;

import com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDTextView;

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;

/**

• Helper class that makes a Web Dynpro table UI element sortable (column-wise).

*/

public final class TableSorter

{

/**

• 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>onAction</code>

• event of sortable columns 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 index 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.

• When a column is made sortable its <code>onAction</code> event (incl.

• parameter mapping) is changed. Furthermore if a header is present for that

• column then the header's <code>imageSource</code> property is also changed

• to indicate the currently sorted column and its sort direction.

• @see sort()

• @see NodeElementByAttributeComparator

• @see com.sap.tc.webdynpro.clientserver.uielib.standard.api.IWDTable

*/

public TableSorter(IWDTable table, IWDAction sortAction, Comparator[] comparators)

{

this.table = table;

// 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");

String dataSourcePrefix = table.bindingOfDataSource() + ".";

int index = 0;

for (Iterator it = table.iterateColumns(); it.hasNext(); ++index)

{ // for every column: try to make it bindable

IWDTableColumn column = (IWDTableColumn) it.next();

Comparator comparator = null;

if ( comparators != null

&& index < comparators.length )

comparator = comparators[index];

ReversableComparator reversable = null;

if (comparator instanceof NodeElementByAttributeComparator)

{ // the easy one, attribute and ordering are given

reversable = new ReversableComparator(comparator);

}

else

{ // attribute must be determined

String bindingOfPrimaryProperty = bindingOfPrimaryProperty(column.getTableCellEditor());

if ( bindingOfPrimaryProperty == null

|| !bindingOfPrimaryProperty.startsWith(dataSourcePrefix) )

continue; // no attribute found or outside of data source

String attributeName = bindingOfPrimaryProperty.substring(dataSourcePrefix.length());

if (attributeName.indexOf('.') >= 0)

continue; // attribute not immediately below data source

reversable = new ReversableComparator(

new NodeElementByAttributeComparator(attributeName, comparator));

}

// set up internal data structures

comparatorForColumn.put(column, reversable);

// prepare table column

column.setOnAction(sortAction);

column.mappingOfOnAction().addSourceMapping("col", "col");

if (column.getHeader() != null)

column.getHeader().setImageSource(null);

}

}

/**

• 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("col");

IWDTableColumn column = (IWDTableColumn) table.getView().getElement(columnId);

ReversableComparator reversable = (ReversableComparator) comparatorForColumn.get(column);

if (reversable == null)

return; // not a sortable column

// remove icon of previously sorted column

if ( currentlySortedColumn != null

&& currentlySortedColumn.getHeader() != null )

currentlySortedColumn.getHeader().setImageSource(null);

// bookkeeping

if (column == currentlySortedColumn)

reversable.toggleReversed();

currentlySortedColumn = column;

// set icon in currently sorted column

if ( currentlySortedColumn.getHeader() != null )

currentlySortedColumn.getHeader().setImageSource(reversable.isReversed()

? "~sapicons/s_b_srtd.GIF"

: "~sapicons/s_b_srtu.GIF");

// sorting

dataSource.sortElements(reversable);

}

/**

• 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;

return ((Comparable) o1).compareTo((Comparable) o2);

}

};

/**

• Map of table column to comparator (<code>ReversableComparator</code>)

• used for sorting that column (sortable columns only).

*/

private final Map comparatorForColumn = new HashMap();

/**

• Column that is currently sorted.

*/

private IWDTableColumn currentlySortedColumn;

/**

• The table to be sorted.

*/

private final IWDTable table;

/**

• 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);

}

/**

• 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);

}

/**

• 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);

}

/**

• Internal constructor.

*/

private NodeElementByAttributeComparator(String attributeName,

Comparator comparator, boolean compareAsText)

{

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;

}

/**

• 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;

Object attributeValue1 = compareAsText

? element1.getAttributeAsText(attributeName)

: element1.getAttributeValue(attributeName);

Object attributeValue2 = compareAsText

? element2.getAttributeAsText(attributeName)

: element2.getAttributeValue(attributeName);

return comparator.compare(attributeValue1, attributeValue2);

}

/**

• 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;

}

/**

• Comparator that knows how to reverse another comparator's sort direction.

*/

private final class ReversableComparator implements Comparator

{

/**

• Creates a new reversable comparator for the given other comparator.

*/

public ReversableComparator(Comparator comparator)

{

if (comparator == null)

throw new IllegalArgumentException("Comparator must not be null");

this.comparator = comparator;

}

/**

• @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)

*/

public int compare(Object o1, Object o2)

{

return reversed

? -comparator.compare(o1, o2)

: comparator.compare(o1, o2);

}

/**

• Tells whether the other comparator's sort direction is reversed.

*/

public boolean isReversed()

{

return reversed;

}

/**

• Determines whether the other comparator's sort direction is reversed.

*/

public void setReversed(boolean reversed)

{

this.reversed = reversed;

}

/**

• Toggles the current "sort direction".

*/

public void toggleReversed()

{

reversed = !reversed;

}

/**

• The other comparator.

*/

private final Comparator comparator;

/**

• Whether the other comparator's sort direction is reversed.

*/

private boolean reversed;

}

}

</b>

Just copy paste it in a file TableSorter.java in the package structure you have created.

Regards

Sid