?? mapping.java
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package sql4j.schema;
/**
* Insert the type's description here.
* Creation date: (11/2/00 2:51:18 PM)
* @author: Jianguo Lu
*/
import java.util.*;
import sql4j.parser.*;import sql4j.util.*;
public class Mapping {
protected Hashtable mapping;
/**
* Mapping constructor comment.
*/
public Mapping() {
super();
}
public Mapping(Hashtable ht){ mapping = ht;
}
/** Given a V4 name, returns a set of v5 names.
**/
public Set applyMapping(String source) {
if (source==null) return null;
Object o = mapping.get(source.toUpperCase());
Set result;
if (o==null){
result=null;
}else if (o instanceof Set){
result=(Set) o;
}else {
result=new HashSet();
result.add(o);
}
return result;
}
// from a vector of string, get a vector of string.
public Vector applyMapping(Vector v) {
HashSet hs=new HashSet();
for (Enumeration e=v.elements();e.hasMoreElements();){
String s=e.nextElement().toString();
Set v5s = this.applyMapping(s);
hs.addAll(v5s);
}
Vector result = new Vector();
Iterator it = hs.iterator();
while (it.hasNext()) {
result.add((String)(it.next()));
}
return result;
}
public Hashtable getMapping() {
return mapping;
}
/** Given a set of V4 table names, returns portion of the table name mapping
that is relevant.
**/
public Mapping getMapping(Set v4s) {
Hashtable ht = new Hashtable();
for (Iterator i = v4s.iterator(); i.hasNext();) {
Object o = i.next();
String v4 = "";
if (o instanceof Table) {
v4 = ((Table) o).toString();
} else
if (o instanceof Column) {
v4 = ((Column) o).toString();
//v4 = Misc.lastOfDottedName(v4);
} else
if (o instanceof String) {
v4 = (String) o;
}
Set v5s = this.applyMapping(v4);
ht.put(v4, v5s);
}
return new Mapping(ht);
}
public Mapping getMapping(Vector v) {
return getMapping(new HashSet(v));
}
public Object put(Object k, Object d) {
if (mapping == null)
mapping = new Hashtable();
return mapping.put(k, d);
}/**
* Insert the method's description here.
* Creation date: (1/18/01 8:27:49 PM)
* @return java.util.Vector
* @param v java.util.Vector
*/
public void putAll(Mapping m) {
if (m != null) {
if (mapping == null) {
mapping = m.getMapping();
} else
if (m.getMapping() != null)
mapping.putAll(m.getMapping());
}
}
/**
* Insert the method's description here.
* Creation date: (11/8/00 5:47:32 PM)
* @return java.lang.String
*/
public String toXML() {
return null;
}
}
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