85 lines
1.9 KiB
Java
85 lines
1.9 KiB
Java
|
package Ext_Tools;
|
||
|
|
|
||
|
|
import java.util.Iterator;
|
||
|
|
import java.util.Vector;
|
||
|
|
|
||
|
|
/**
|
||
|
|
*
|
||
|
|
* <b> Task of this class </b> <br/>
|
||
|
|
* It represents the group part of a selection query and consists of a list
|
||
|
|
* of column references (which represented by groupElement)
|
||
|
|
*/
|
||
|
|
public class GroupClause {
|
||
|
|
private Vector<GroupElement> GElems;
|
||
|
|
private boolean Empty;
|
||
|
|
|
||
|
|
public GroupClause(GroupElement NewElem) {
|
||
|
|
GElems = new Vector<GroupElement>();
|
||
|
|
GElems.add(NewElem);
|
||
|
|
this.Empty = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
public GroupClause(String Nothing) {
|
||
|
|
this.Empty = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
public boolean isEmpty() {
|
||
|
|
return this.Empty;
|
||
|
|
}
|
||
|
|
|
||
|
|
public GroupClause addElement(GroupElement NewElem) {
|
||
|
|
GElems.addElement(NewElem);
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void CheckAndAddQuali(Qualifier QualiElem) {
|
||
|
|
boolean result = false;
|
||
|
|
Iterator<GroupElement> it;
|
||
|
|
GroupElement CurrentElement;
|
||
|
|
String quali = QualiElem.getQuali();
|
||
|
|
String att = QualiElem.getAtt();
|
||
|
|
|
||
|
|
it = this.GElems.iterator();
|
||
|
|
while (it.hasNext() && !result) {
|
||
|
|
CurrentElement = it.next();
|
||
|
|
if (!CurrentElement.hasQuali() && CurrentElement.getAtt().equalsIgnoreCase(att))
|
||
|
|
CurrentElement.setQuali(quali);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public void SetAllOtherQualis(String Alias) {
|
||
|
|
Iterator<GroupElement> it;
|
||
|
|
GroupElement CurrentElement;
|
||
|
|
|
||
|
|
it = this.GElems.iterator();
|
||
|
|
while (it.hasNext()) {
|
||
|
|
CurrentElement = it.next();
|
||
|
|
if (!CurrentElement.hasQuali())
|
||
|
|
CurrentElement.setQuali(Alias);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public String getGroupClause() {
|
||
|
|
String result="";
|
||
|
|
boolean inSquareBrackets = false;
|
||
|
|
Iterator<GroupElement> it;
|
||
|
|
|
||
|
|
if (!this.Empty) {
|
||
|
|
if (this.GElems.size() > 1){
|
||
|
|
inSquareBrackets=true;
|
||
|
|
result = "[";
|
||
|
|
}
|
||
|
|
it = this.GElems.iterator();
|
||
|
|
result+=it.next().getGElement();
|
||
|
|
|
||
|
|
while (it.hasNext())
|
||
|
|
result+=", " + it.next().getGElement();
|
||
|
|
if (inSquareBrackets)
|
||
|
|
result += "]";
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|