Tin*_*iny 5 datatable jsf composite-key primefaces lazydatamodel
我在MySQL数据库中有一个表.不幸的是,GlassFish Server中的JAAS身份验证/授权需要一个复合主键.
mysql> desc group_table;
+---------------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+-------+
| user_group_id | varchar(176) | NO | PRI | NULL | |
| group_id | varchar(15) | NO | PRI | NULL | |
+---------------+--------------+------+-----+---------+-------+
2 rows in set (0.05 sec)
该表包含以下格式的数据.
mysql> select * from group_table;
+-------------------------+------------+
| user_group_id | group_id |
+-------------------------+------------+
| you123@gmail.com | ROLE_ADMIN |
| you123@gmail.com | ROLE_USER |
| you123@ymail.com | ROLE_USER |
| you123@hotmail.com | ROLE_USER |
| you123@yahoo.com | ROLE_USER |
+-------------------------+------------+
5 rows in set (0.00 sec)
一个<p:dataTable>与rowKey工作正常,当lazy设置为false.
<p:dataTable rowKey="#{row.groupTablePK.userGroupId} #{row.groupTablePK.groupId}">
...
</p:dataTable>
GroupTablePK是一个@Embeddable班级(JPA).我认为不需要有关这门课程的详细信息.
当lazy然而,启用上<p:dataTable>,则getRowKey()和getRowData()方法需要实现.
当存在需要将列组合作为行键的复合主键时,如何才能完成此操作 - 唯一的行标识符？
@Named
@ViewScoped
public class UserAuthorityManagedBean extends LazyDataModel<GroupTable> implements Serializable {
private static final long serialVersionUID = 1L;
@Override
public Object getRowKey(GroupTable groupTable) {
return groupTable != null ? groupTable.getGroupTablePK() : null;
}
@Override
public GroupTable getRowData(String rowKey) {
List<GroupTable> list = (List<GroupTable>) getWrappedData();
System.out.println("rowKey : " + rowKey);
}
@Override
public List<GroupTable> load(int first, int pageSize, List<SortMeta> multiSortMeta, Map<String, Object> filters) {
//... setRowCount(rowCount);
//... Return a List<GroupTable> from a business Service.
}
}
上述实现不完整.
在<p:dataTable>使用这些实现中选择行时,方法sout内的语句将getRowData()显示以下内容.
Info: rowKey : entity.GroupTablePK[ userGroupId=you123@gmail.com
Info: rowKey : groupId=ROLE_USER ]
该getRowKey()方法返回一个实例,GroupTablePK但该getRowData()方法只接受String类型参数.它不是表示复合主键(在此GroupTablePK)的对象,因此它可以被类型转换为适当的对象类型(GroupTablePK),并且基于该对象GroupTable可以从给定的实例中获取List<GroupTable>并获取该getRowData()方法以返回该实例GroupTable.
怎么进一步？
问题完全基于前一个问题:
java.lang.UnsupportedOperationException:当不使用基本rowKey算法时,必须实现getRowData(String rowKey)
编辑:
我hashcode()和equals()除了实现toString()的GroupTablePK.的toString()在方法GroupTablePK返回return "entity.GroupTablePK[ userGroupId=" + userGroupId + ", groupId=" + groupId + " ]";,但getRowData()方法被调用两次,当在一排<p:dataTable>被选择.它GroupTablePK在两个后续调用中返回两部分的字符串表示形式.在第一次调用中,它返回entity.GroupTablePK[ userGroupId=aaa,然后在第二次调用中返回groupId=ROLE_USER ].
它应该entity.GroupTablePK[ userGroupId=aaa, groupId=ROLE_USER ]在一次通话中立即返回.
groupTable.getGroupTablePK().toString().equals(rowKey)因此,在本文之前我无法进行这种比较.如,
@Override
public GroupTable getRowData(String rowKey) {
List<GroupTable> list = (List<GroupTable>) getWrappedData();
for (GroupTable groupTable : list) {
if (groupTable.getGroupTablePK().toString().equals(rowKey)) {
return groupTable;
}
}
return null;
}
编辑2:
以下是删除JPA噪声以重现问题的最短示例.
试图交替,
所有这些PrimeFaces版本的行为都保持不变.
托管bean:
@Named
@ViewScoped
public class CompositeRowKeyManagedBean extends LazyDataModel<GroupTable> implements Serializable {
private List<GroupTable> selectedValues; // Getter & setter.
private static final long serialVersionUID = 1L;
public CompositeRowKeyManagedBean() {}
private List<GroupTable> init() {
List<GroupTable> list = new ArrayList<GroupTable>();
GroupTablePK groupTablePK = new GroupTablePK("aaa", "ROLE_ADMIN");
GroupTable groupTable = new GroupTable(groupTablePK);
list.add(groupTable);
groupTablePK = new GroupTablePK("bbb", "ROLE_USER");
groupTable = new GroupTable(groupTablePK);
list.add(groupTable);
groupTablePK = new GroupTablePK("ccc", "ROLE_USER");
groupTable = new GroupTable(groupTablePK);
list.add(groupTable);
groupTablePK = new GroupTablePK("ddd", "ROLE_USER");
groupTable = new GroupTable(groupTablePK);
list.add(groupTable);
groupTablePK = new GroupTablePK("eee", "ROLE_USER");
groupTable = new GroupTable(groupTablePK);
list.add(groupTable);
return list;
}
@Override
public List<GroupTable> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, Object> filters) {
List<GroupTable> list = init();
setRowCount(list.size());
return list;
}
@Override
public Object getRowKey(GroupTable groupTable) {
return groupTable != null ? groupTable.getGroupTablePK() : null;
}
@Override
public GroupTable getRowData(String rowKey) {
List<GroupTable> list = (List<GroupTable>) getWrappedData();
System.out.println("rowKey : " + rowKey);
for (GroupTable groupTable : list) {
if (groupTable.getGroupTablePK().toString().equals(rowKey)) {
return groupTable;
}
}
return null;
}
public void onRowEdit(RowEditEvent event) {
GroupTablePK groupTablePK = ((GroupTable) event.getObject()).getGroupTablePK();
System.out.println("grouoId : " + groupTablePK.getGroupId() + " : userGroupId : " + groupTablePK.getUserGroupId());
}
}
数据表:
<p:dataTable var="row"
value="#{compositeRowKeyManagedBean}"
lazy="true"
editable="true"
selection="#{compositeRowKeyManagedBean.selectedValues}"
rows="50">
<p:column selectionMode="multiple"></p:column>
<p:ajax event="rowEdit" listener="#{compositeRowKeyManagedBean.onRowEdit}"/>
<p:column headerText="GroupId">
<h:outputText value="#{row.groupTablePK.userGroupId}"/>
</p:column>
<p:column headerText="UserGroupId">
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{row.groupTablePK.groupId}"/>
</f:facet>
<f:facet name="input">
<p:inputText value="#{row.groupTablePK.groupId}"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="Edit">
<p:rowEditor/>
</p:column>
</p:dataTable>
尝试编辑行时,将onRowEdit()调用该方法.在getRowData()被调用两次,如前面所说的产生行键的一分为二的后续调用.
这是两个域类GroupTable和GroupTablePK.
public class GroupTable implements Serializable {
private static final long serialVersionUID = 1L;
protected GroupTablePK groupTablePK;
public GroupTable() {}
public GroupTable(GroupTablePK groupTablePK) {
this.groupTablePK = groupTablePK;
}
public GroupTable(String userGroupId, String groupId) {
this.groupTablePK = new GroupTablePK(userGroupId, groupId);
}
public GroupTablePK getGroupTablePK() {
return groupTablePK;
}
public void setGroupTablePK(GroupTablePK groupTablePK) {
this.groupTablePK = groupTablePK;
}
@Override
public int hashCode() {
int hash = 0;
hash += (groupTablePK != null ? groupTablePK.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
if (!(object instanceof GroupTable)) {
return false;
}
GroupTable other = (GroupTable) object;
if ((this.groupTablePK == null && other.groupTablePK != null) || (this.groupTablePK != null && !this.groupTablePK.equals(other.groupTablePK))) {
return false;
}
return true;
}
@Override
public String toString() {
return "entity.GroupTable[ groupTablePK=" + groupTablePK + " ]";
}
}
public class GroupTablePK implements Serializable {
private String userGroupId;
private String groupId;
public GroupTablePK() {}
public GroupTablePK(String userGroupId, String groupId) {
this.userGroupId = userGroupId;
this.groupId = groupId;
}
public String getUserGroupId() {
return userGroupId;
}
public void setUserGroupId(String userGroupId) {
this.userGroupId = userGroupId;
}
public String getGroupId() {
return groupId;
}
public void setGroupId(String groupId) {
this.groupId = groupId;
}
@Override
public int hashCode() {
int hash = 0;
hash += (userGroupId != null ? userGroupId.hashCode() : 0);
hash += (groupId != null ? groupId.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
if (!(object instanceof GroupTablePK)) {
return false;
}
GroupTablePK other = (GroupTablePK) object;
if ((this.userGroupId == null && other.userGroupId != null) || (this.userGroupId != null && !this.userGroupId.equals(other.userGroupId))) {
return false;
}
if ((this.groupId == null && other.groupId != null) || (this.groupId != null && !this.groupId.equals(other.groupId))) {
return false;
}
return true;
}
@Override
public String toString() {
return "entity.GroupTablePK[ userGroupId=" + userGroupId + ", groupId=" + groupId + " ]";
}
}
我跑了你的MCVE(对此赞不绝口!)并重现了它.rowkey似乎被解释为客户端中的逗号分隔字符串,以涵盖需要多个选择时的情况.如果单个rowkey的字符串表示形式包含逗号,则会失败,如您的情况.您获得的rowkey参数getRowData()是明确的证据:它们是原始值在逗号上拆分时的结果.
因此,要解决此问题,您需要确保在getRowKey().toString()任何地方都不包含逗号.更好地使用不同的分隔符.例如下划线.
@Override
public Object getRowKey(GroupTable groupTable) {
GroupTablePK pk = groupTable != null ? groupTable.getGroupTablePK() : null;
return pk != null ? pk.getUserGroupId() + "_" + pk.getGroupId() : null;
}
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