1. Overview The foregoing instructions have some basic concepts and design ideas. From the UML diagram, there can be a lot of content, such as class relationships, component relationships, which will be implemented using Java implementation.
2, realize TransformData
/ *
* Created on 2004-7-21 by jem.lee
*
* TransformData is a part of cn.bs.common.transdata
* All Rights Reserved.
* CopyRight (C) 2004. Jem.lee
* /
/ * Package path cn.bs.common.transdata * /
Package cn.bs.common.transdata;
/ * Import package content * /
Import java.util.hashmap;
Import java.util.iterator;
/ **
*
* History
* 2004-7-21
21:02:57
Created by Jem.lee
*
* Purpose
* The main object of data transfer is performed as a view and controller,
* It contains general elements objects and table objects
*
* /
Public Class TransformData IMPLEments Cloneable {
/ *
* Hash table stores a single element
* /
PRIVATE HASHMAP TRSELEMENTS = new hashmap ();
/ *
* Hash table stores the Table element
* /
Private hashmap trutables = new hashmap ();
/ **
*
* Get the value of the specified element name from Formdata
* @Param Name element name
* @Return element corresponding to the value
* @Throws Exception
*
* /
Public String getfieldValue (String name) throws exception {
Return (this.GetfieldFromName (Name) .GetValue ());
}
/ **
*
* Get the specified element domain name from FormData
* @Param Name element name
* @Return Element Corresponding domain
* @Throws Exception
*
* /
Public Transformfield getfieldfromname (String name) throws exception {
IF (name == null) {
Throw (New NullPointersRexception ("Then the Name Name is empty or null")));
}
TRANSFORMFIELD RET = (Transformfield) TRSELEments.GET (NAME);
IF (RET == NULL) {
Throw (New Exception ")))));" Domain "));
}
Return (RET);
}
/ **
*
* Specify an element to Formdata and set it, if the element is found, the element is overwritten.
* @Param Name element name
* @Param Value elements value
*
* /
Public void PutfieldValueo (String Name, String Value) {
TRANSFORMFIELD NEWELEMENT = New Transformfield (Name, Value); NewElement.SetParent (this);
THIS.PUTELEMENTSO (NEWELEMENT);
}
/ **
*
* Set the Elevent Domain of FormData.
* @Param newElement designated new domain
*
* /
Public void Putelementso (Transformfield NewElement) {
NEWELEMENT.SETPARENT (THIS);
This.Trselements.put (newElement.getname (), newElement;
}
/ * ------------------------------------------------------------------------------------------- - * /
/ **
*
* Increase Table to Formdata and return to the table, if the specified table already exists,
* Throws Exception exceptions
* @Param Name Table name
* @Return FormTable returned Table type
* @Throws Exception
*
* /
Public TransformTable AddTable (String Name) Throws Exception {
IF (TRSTables.Get (Name)! = null) {
Throw (New Exception ());
}
Return (AddTableo (Name);
}
/ **
*
* Increase Table to FormData and return to this table, if the specified table already exists,
* The new table is forcibly overwritten.
* @Param Name Table name
* @Return FormTable returned Table type
*
* /
Public TransformTable AddTableo (String TableName) {
TransformTable NewTable = New TransformTable (TABLENAME);
NEWTABLE.SETPARENT (THIS);
Trstables.put (TableName, NewTable);
Return (NewTable);
}
/ **
*
* Sort Table content
*
* /
Void SortTable () {
Iterator itables = this.trstables.keyset (). Iterator ();
While (itables.hasnext ()) {
TransformTable TBL = (TransformTable) this.trstables.get (itables.next ());
Tbl.sort ();
}
}
/ **
*
* Get instances of the specified table name
* @Param Name Table Name
* @Return Specify an instance of the table name
* @Throws BScomponEntexception, NullPointerexception, IllegaArgumentException
*
* /
Public TransformTable GetTable (String Name) throws Exception {
IF (name == null) {
Throw (New NullPointersRexception "));}
IF (Name.Equals (")) {
Throw (New ILLEGALARGUMENTEXCEPTION ("Enter the domain name is empty"))))))
}
TRANSFORMTABLE RET = (TransformTable) TRSTABLES.GET (NAME);
IF (RET == NULL) {
Throw (New Exception ());
}
Return (RET);
}
}
3, realize TRANSFORMFIELD
/ *
* Created on 2004-7-21 by jem.lee
*
* Transformfield is a part of cn.bs.common.transdata
* All Rights Reserved.
* CopyRight (C) 2004. Jem.lee
* /
/ * Package path cn.bs.common.transdata * /
Package cn.bs.common.transdata;
/ **
*
* History
* 2004-7-21
21:03:26
Created by Jem.lee
*
* Purpose
* The main object of data transfer is performed as a view and controller,
* It as a general element object
*
* /
Public class transformfield {
/ *
* Element name
* /
PRIVATE STRING NAME;
/ *
* Element value
* /
PRIVATE STRING VALUE;
/ *
* Store this element of the parent directory
* /
PRIVATE TRANSFORMDATA PARENT;
/ **
* Constructor
* @Param Initname element name
* @Param initValue element value
* /
Public Transformfield (String Initname, String Initvalue) {
/ * If the name of the element is supplied, the NullPointerexception exception is thrown. * /
IF (InitName == Null)
Throw ("" "" "" Initialization Formfield is initialized, for example, initname is null "));
/ * If the name of the element provided is empty, IllegaLaRGumentException exceptions * /
IF (InitName.equals ("))
Throw (New IllegaLargumentException ("The parameter error provided when Formfield is initialized, the initname is empty))));
/ * If the value provided is NULL, it throws the NullPointerexception exception * /
IF (initValue == null)
Throw (New NullpointerException ("Initializing the parameter error provided by Formfield, INITVALUE is null"));
THIS.NAME = INITNAME;
THIS.VALUE = INITVALUE;
}
/ **
*
* Get element name
* @Return element name
*
* /
Public string getname () {
Return (this.name);
}
/ **
*
* Value of the element
* @return elements value
*
* /
Public String getValue () {
Return (this.Value);
}
/ **
*
* Set the parent directory of the element
* @Param newParent parent directory
*
* /
Public void setparent (TransformData newParent) {
/ * If the parent directory is NULL, throw the NullPointerexception exception * /
IF (newParent == null)
Throw (New NullpointerException ("Setting the Formfield's Packer FormData Error, such as null");
THIS.PARENT = NewParent;
}
}
4, realize TransformRecord
/ *
* Created on 2004-7-21 by jem.lee
*
* TransformRecord is a part of cn.bs.common.transdata
* All Rights Reserved.
* CopyRight (C) 2004. Jem.lee
* /
/ * Package path cn.bs.common.transdata * /
Package cn.bs.common.transdata;
/ **
*
* History
* 2004-7-21
21:03:44
Created by Jem.lee
*
* Purpose
* The main object of data transfer is performed as a view and controller,
* It as an element object for Table objects
*
* /
Public Class TransformRecord Extends TransformData Implements Comprarable {
/ *
* Record ID
* /
PRIVATE INT REC_ID;
/ *
* Store this element of the parent directory
* /
Private TransformTable Parent;
Public int compareto (Object Target) {
Target InstanceOf TransformRecord
RETURN (REC_ID - ((TransformRecord) Target .getRecid ());
Return (0);
}
/ **
*
* Set the parent directory of the element
* @Param newParent parent directory
*
* /
Void setParent (TransformTable newParent) {
Parent = newparent;
}
/ **
*
* Get the parent directory of the element
* @Return FormTable Parent Directory
*
* /
TransformTable getParent () {
Return (PARENT);
}
/ **
*
*
* Set new record ID
* @Param NewID record ID
*
* /
Void setRecid (int new_id) {
REC_ID = New_ID;
}
/ **
*
*
* Obtained record ID
* @Return record ID
*
* /
Int getRecid () {
Return (REC_ID);
}
}
5. Implement TransformTable
/ *
* Created on 2004-7-21 by jem.lee
*
* Formtable.java is a part of cn.bs.common.transdata
* All Rights Reserved.
* Copyright (c) 2004. Jem.lee * // * Package path cn.bs.common.transdata * /
Package cn.bs.common.transdata;
/ * Import package content * /
Import java.util.arraylist;
Import java.util.collections;
Import java.util.iterator;
/ **
*
* History
* 2004-7-21
21:04:00
Created by Jem.lee
*
* Purpose
* The main object of data transfer is performed as a view and controller,
* It as an element object as a Formdata object
*
* /
Public class transformtable {
/ *
* TABLE Name
* /
PRIVATE STRING NAME;
/ *
* Record array
* /
Private arraylist records = new arraylist ();
/ *
* Store this element of the parent directory
* /
PRIVATE TRANSFORMDATA PARENT;
/ **
*
* Constructor Provides a table name
* @Param Initname Table Name
*
* /
Public TransformTable (String InitName) {
/ * If the name of the name is NULL, throw the NullPointerexception exception * /
IF (InitName == Null)
Throw (New NullPointerException ("Constructs the formTable error, such as N-Null"));
/ * If the design provided is empty, throw a NullPointeredException exception * /
IF (InitName.equals ("))
Throw (New IllegalargumentException ")))));
THIS.NAME = INITNAME;
}
/ **
*
* Set the parent directory of the element
* @Param newParent parent directory
*
* /
Void setParent (TransformData newParent) throws nullpointersReption {
/ * If the parent directory provided is NULL, throw the NullPointerexception exception * /
IF (newParent == null)
Throw ("Setting ForformTableMfield's Inclusive Formdata Error, such as null"));
THIS.PARENT = NewParent;
}
/ **
*
*
* Add a record to TABLE
* @return Returns the instance of the record to make assignment operations
*
* /
Public TransformData Add () {
TRANSFORMRECORD NewRec = New TransformRecord ();
Newrec.SetParent (this);
Records.add (newREC);
Reindex ();
sort ();
Return (newREC);
}
/ **
*
*
* Sort function, sort the record of the table
*
* /
Void sort () {
Collectes.Sort (Records); item IRECs = Records.Itemrator ();
While (IRECs.hasnext ()) {
TRANSFORMDATA REC = (TransformData) IRECS.NEXT ();
Rec.SortTable ();
}
}
/ **
*
*
* Record index
*
* /
Void reindex () {
INT INDEX = 0;
//Collections.sort (RECS);
Iterator i = Records.Itemrator ();
While (I.hasNext ()) {
TransformRecord REC = (TransformRecord) i.next ();
Rec.SetRecid (INDEX);
INDEX ;
}
}
/ **
*
*
* Get a record through the record number
* @Param Recno record number
* @Return a record
*
* /
Public TransformData Get (int reccno) {
RETURN (TransformData) Records.get (Recno));
}
/ **
*
*
* Get the length of the table
* @ReturN table length
*
* /
Public int size () {
Return (Records.Size ());
}
}
6, summarize here, I made a brief introduction to the H-DTO mode, I hope some help to your design. If you find the wrong, please criticize correctly, if you have any questions or unknown, welcome to discuss.
