Juliana Arnolds --
If I use a paginated list, I can sort information prior to getting to
the JSP; the displaytag api doesn't do the sorting for me. By the way,
do the "Item" objects override the equals() and hashCode() methods?
(They are necessary if you wish to sort a list.)
Attached is my implementation of a paginated list.
-- Sean
On 05/31/2010 08:46 PM, Juliana Arnolds wrote:
Hi,
I'm having trouble performing an external sort. I have a paginated
list containing a list of "Item" objects. Each "Item" object contains
an object, "InnerTestClass" as shown below. The InnerTestClass
contains 2 member variables, testId and testName. I need to be able
to perform a sort on the testId and testName attributes of the
encapsulated class, InnerTestClass. Is this possible?
public class Item {
// other member variables with getter and setters
private class InnerTestClass innerClass;
public void setInnerClass(InnerTestClass innerClass) {
this.innerClass = innerClass;
}
public InnerTestClass getInnerClass() {
return innerClass;
}
}
I can set the default sort as "testId" and the table will render
because when it first displays the sort is null. However, if I click
on the column entitled, "Item Name", then the query string has
"sort=innerClass.testName" when I need it to be "sort=testName". Is
there anyway to set this explicitly or is display tag just using the
property name that is set?
<display:table name="items" uid="foo" requestURI="display.spr"
sort="external" partialList="true" size="${items.fullListSize}"
pagesize="4">
<display:column property="innerClass.testId" title="Item Uid"
sortName="testId">
${foo.innerClass.testId}
</display:column>
<display:column property="innerClass.testName" title="Item Name"
sortName="testName" sortable="true" headerClass="sortable">
${foo.innerClass.testName}
</display:column>
</display:table>
Any help would be greatly appreciated --
Thanks!
J
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package utils;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.displaytag.pagination.PaginatedList;
import org.displaytag.properties.SortOrderEnum;
public class PaginatedListImpl implements PaginatedList {
private static int DEFAULT_PAGE_SIZE = 10;
private int fullListSize;
private List<?> list;
private int index;
private int objectsPerPage;
private int pageNumber;
private String searchId;
private String sortCriterion;
private SortOrderEnum sortDirection;
public PaginatedListImpl() {}
public PaginatedListImpl(int fullListSize, List<?> list, int
objectsPerPage,
int pageNumber, String searchId,
String sortCriterion, SortOrderEnum sortDirection ) {
super();
this.fullListSize = fullListSize;
this.list = list;
this.objectsPerPage = objectsPerPage;
this.pageNumber = pageNumber;
this.searchId = searchId;
this.sortCriterion = sortCriterion;
this.sortDirection = sortDirection;
}
public PaginatedListImpl( HttpServletRequest request ) {
sortCriterion = request.getParameter("sort");
sortDirection = "desc".equals(request.getParameter("dir"))?
SortOrderEnum.DESCENDING : SortOrderEnum.ASCENDING;
objectsPerPage = DEFAULT_PAGE_SIZE;
String page = request.getParameter( "page" );
index = page == null ? 0 : Integer.parseInt( page ) - 1;
}
public int getFullListSize() {
return fullListSize;
}
public void setFullListSize(int fullListSize) {
this.fullListSize = fullListSize;
}
public List<?> getList() {
return list;
}
public void setList(List<?> list) {
this.list = list;
}
public int getObjectsPerPage() {
return objectsPerPage;
}
public void setObjectsPerPage(int objectsPerPage) {
this.objectsPerPage = objectsPerPage;
}
public int getPageNumber() {
return pageNumber;
}
public int getIndex() {
return 1 + (( pageNumber - 1 ) * 10 );
}
public void setPageNumber(int pageNumber) {
this.pageNumber = pageNumber;
}
public String getSearchId() {
return searchId;
}
public void setSearchId(String searchId) {
this.searchId = searchId;
}
public String getSortCriterion() {
return sortCriterion;
}
public void setSortCriterion(String sortCriterion) {
this.sortCriterion = sortCriterion;
}
public SortOrderEnum getSortDirection() {
return sortDirection;
}
public void setSortDirection(SortOrderEnum sortDirection) {
this.sortDirection = sortDirection;
}
}------------------------------------------------------------------------------
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