CN101021877A - Method and apparatus for updating object local attribute to related data bank - Google Patents
Method and apparatus for updating object local attribute to related data bank Download PDFInfo
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Abstract
This invention discloses a method and a device for updating partial attributes of an object to a relation database including: setting up objects necessary for updating partial attributes, assigning the ID of the object and attribute needing to be updated, converting said object and its attribute information to a script identified by the mapping tool of the object relation database to be used to perdure the information in the script to said relation database. The device includes: an object relation database mapping unit, an object generation unit and an object information converting unit.
Description
Technical field
The present invention relates to data processing technique, be specifically related to a kind ofly in object, object local attribute is updated to the method and the device of relational database.
Background technology
The mapping conversion of O/R-Mapping (object) is integrated object-oriented and relevant database can be enjoyed the benefit of Object-Oriented Design when we are used in the development data storehouse.The instrument and the scheme that realize O/R-MAPPING at present are a lot, as Hibernate, and TopLink, iBatis.Utilize these instruments, can finish the mapping between the tables of data in data object and the relational database automatically, promptly provide the solution of a data Object Persistence in the relational database.
In the process of Object Persistence, sometimes the user only thinks the more part attribute of new data-objects.For this demand, provide several solutions in the various O/R MAPPING of the industry instrument at present, following tupe is specifically arranged:
1. by writing similar SQL (Structured Query Language, structured query language) the update processing scripts in the statement, the user is write several attributes of oneself wanting to upgrade the script of similar SQL statement as, gives O/R MAPPING tool for processing.Translate into the SQL statement of real database by the mapping of O/R MAPPING instrument, and give database and carry out, such as the HQL (a kind of OO query language) of Hibernate, the TopLink of Oracle adopts XQuery etc.
This tupe is owing to adopted a kind of tupe of similar SQL statement update script, this just needs the user at first must be familiar with the literary style of this statement script, and owing to realize by script mode, therefore after some attributes of object change, need in program, revise these scripts, thereby bring certain cost and complicacy for user's development sequence.In addition, because the singularity (being closely related the script that right and wrong are general with concrete instrument) of this script is not easy to program portable and upgrading; Simultaneously because this script usually and bigger related of storing of backstage, thereby has also departed from the original intention of use O/RMAPPING instrument to a certain extent.
2. at first utilize O/R MAPPING instrument that this data object is checked out, each attribute of data object all has value like this, and then assignment is given the attribute that needs the data updated object again, is persisted in the database by O/R MAPPING instrument after assignment is finished again.
Because object passes to O/R MAPPING instrument when carrying out persistence, the O/RMAPPING handling implement can't know which attribute of this object should upgrade, which should not upgrade, therefore, when the part attribute that only needs to upgrade in the object, just this object must be retrieved or refresh out, will increase a query actions more like this, system performance is had relatively seriously influence.
Summary of the invention
The embodiment of the invention provides a kind of method and device that object local attribute is updated to relational database, to realize the renewal to data object part data simply and effectively, makes things convenient for the exploitation and the program upgrade of application program.
A kind of method that object local attribute is updated to relational database that the embodiment of the invention provides comprises:
Creating needs the more object of new portion attribute;
Be the attribute assignment that needs in the described object to upgrade;
Described object and attribute information thereof are converted to the script that object relationship Database Mapping instrument can be discerned;
Utilize described object relationship Database Mapping instrument that the information in the described script is persisted in the described relational database.
The another kind that the embodiment of the invention provides comprises the method that object local attribute is updated to relational database:
Creating needs the more object of new portion attribute;
Be the attribute assignment that needs in the described object to upgrade;
Described object and attribute information thereof are converted to the SQL statement that described relational database can be discerned;
Carry out described SQL statement, finish the renewal of data object part attribute in the described relational database.
A kind of device that object local attribute is updated to relational database that the embodiment of the invention provides comprises:
Object relationship Database Mapping unit is used for according to the script of data of description object properties data object being persisted to described relational database;
Object generation unit is used to create the more object and the attribute information thereof of new portion attribute;
The object information converting unit is used for described object and attribute information thereof are converted to the script that object relationship Database Mapping instrument can be discerned, and described script is submitted to described object relationship Database Mapping unit.
The another kind that the embodiment of the invention provides comprises the device that object local attribute is updated to relational database:
Object generation unit is used to create the more object and the attribute information thereof of new portion attribute;
The object information converting unit is used for described object and attribute information thereof are converted to the SQL statement that described relational database can be discerned, and SQL statement is submitted to described relational database.
The technical scheme that is provided by the above embodiment of the invention as can be seen, when the object in the relational database being carried out the renewal of part attribute, only need to create the object of a correspondence, and attribute assignment to needing in this object to upgrade, then this object and attribute information thereof are converted to the script that object relationship Database Mapping instrument can be discerned, the information in the described script are persisted in the described relational database by object relationship Database Mapping instrument; Perhaps this object and attribute information thereof directly are converted to the SQL statement that relational database can be discerned, carry out renewal process by relational database according to described SQL statement, thereby realized partial update, avoided of the influence of all properties of query object system's generation to object properties in the relational database.The device that utilizes the embodiment of the invention to provide, can make the user when upgrading the part attribute of an object, not need to write again complicated script or SQL statement, only need directly to create an object, the key mark of this object of assignment and the attribute that need to upgrade can directly upgrade the attribute of this object.
Description of drawings
Fig. 1 is the process flow diagram of the inventive method first embodiment;
Fig. 2 is the process flow diagram of the inventive method second embodiment;
Fig. 3 is the theory diagram of apparatus of the present invention first embodiment;
Fig. 4 is the theory diagram of apparatus of the present invention second embodiment;
Fig. 5 is the theory diagram of apparatus of the present invention the 3rd embodiment;
Fig. 6 is the theory diagram of apparatus of the present invention the 4th embodiment.
Embodiment
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
With reference to Fig. 1, Fig. 1 be the present invention with the flow process that object local attribute is updated to method first embodiment of relational database, may further comprise the steps:
Such as, the object that needs to upgrade is " Student ", comprises following attribute: Student ID, student's name, student's sex, student's class, student's age.Need this moment to create an empty object identical, that is to say that each property value in this object is not also by assignment with this object.
At first, be the sign of this object, i.e. Student ID assignment, the attribute of Geng Xining has if desired: student's class and student's age, then also need to be these two attribute assignments.Can utilize the attribute assignment of the set method of object for the needs renewal.
Owing to realize that the instrument of O/R MAPPING is a lot, such as Hibernate, TopLink, iBatis etc., therefore, can set up the mapping logic relation of the object properties that are applicable to these object relationship Database Mapping instruments and script sentence, set up new object and to its attribute assignment that need upgrade after, just can extract this object and attribute information thereof, and be converted into the script that corresponding object relationship Database Mapping instrument can be discerned according to this mapping logic relation.
Certainly, when the object part attribute upgrades in carrying out relational database, also can be not by means of object relationship Database Mapping instrument, but provide the mapping logic relation of the SQL statement that object properties and relational database can discern to the user, the SQL statement that object that needs is upgraded according to this mapping logic relation and attribute information thereof are converted to relational database, carry out these SQL statement by the data operating interface that relational database provides, finish renewal this object part attribute.
With reference to Fig. 2, Fig. 2 be the present invention with the flow process that object local attribute is updated to method second embodiment of relational database, may further comprise the steps:
Equally, owing to relational database can be set up by different language, such as, programming languages such as Java, vc, vb.Therefore, can set up the object properties of support different language relational database and the mapping logic relation of SQL statement, set up new object and to its attribute assignment that need upgrade after, just can extract this object and attribute information thereof, and be converted into the SQL statement that corresponding relational database can be discerned according to this mapping logic relation.
Define (being described) with the Student object below, further specify the process that object local attribute is updated to relational database with the java program.
Public?student
{
Private Long studentID // student ID
Private String Name // student's name
Private String Sex // student's sex
Private String Class // student's class
Private int Age // student's age
Private Map modifyDESC=" " // be used for writing down the situation of Student attribute change defines the buffer of a record attribute situation of change here
Public?void?setstudentID(Long?studentID)
{
this.studentID＝studentID；
}
Public?Long?getstudentID()
{
Return?this.studentID；
}
Public?void?setName(string?name)
{
this.Name＝name；
This.ModifyDESC.put (" class ", name) // attribute of local updating is preserved
}
Public?String?getName()
{
Return?this.Name；
}
Public?void?setSex(string?sex)
{
this.Sex＝sex；
This.ModifyDESC.put (" Sex ", sex) // attribute of local updating is preserved
}
Public?String?getSex()
{
Return?this.sex；
}
Public?void?setClass(string?class)
{
this.Class＝class；
This.ModifyDESC.put (" class ", name) // attribute of local updating is preserved
}
Public?Long?getClass()
{
Return?this.Name；
}
Public?void?setAge(int?age)
{
this.Age＝age；
This.ModifyDESC.put (" Age ", age) // attribute of local updating is preserved
}
Public?int?getAge()
{
Return?this.Age；
}
Public Map getmodifyDESC () // obtain this MAP gets access to name, the sex, the attributes such as class, Age that change by this method
{
Return?this.Age；
}
}
In the superincumbent example, in the time of the Set of application call data object method, will be put into the value of this up-to-date modification among a kind of member variable modifyDESC of MAP type.
For example, it is 18 years old that the user wants to upgrade the age that a student numbers ID=100001, then carries out following setting:
Student?student＝new?Student()；
Student.setstudentID(100001)；
Student.setAge (18); // age is set
Then, the attribute information of this object and needs renewal thereof is noted, and be converted to the script that object relationship Database Mapping instrument can be discerned.Then, call method getmodifyDESC obtains the set MAP of this object local updating attribute, and the value of this MAP is taken out, and translates into SQL, and perhaps O/RMAPPING institute can execution script.
The embodiment of the invention also provides a kind of device that object local attribute is updated to relational database, utilize this device, when upgrading the part attribute of an object, do not need to write complicated script or SQL statement, and only need directly to create an object, the sign of this object of assignment and the attribute that need upgrade, by the object information translation function that provides among apparatus of the present invention embodiment this object and attribute information thereof are converted to the script that object relationship Database Mapping instrument can be discerned then, the attribute that utilizes this script that described object need be upgraded by object relationship Database Mapping instrument is persisted in the corresponding relational database then; Also can directly this object and attribute information thereof be converted to the SQL statement that corresponding relational database can be discerned by the object information translation function that provides among apparatus of the present invention embodiment, the data operating interface that provides by relational database itself upgrades these attributes of this object then.
With reference to Fig. 3, Fig. 3 is the theory diagram that the present invention is updated to object local attribute device first embodiment of relational database:
In this embodiment, comprising: object generation unit 31, object information converting unit 32 and object relationship Database Mapping unit 33.Wherein, object generation unit 31 is used to create the more object and the attribute information thereof of new portion attribute.
Object information converting unit 32 is used for described object and attribute information thereof are converted to the script that object relationship Database Mapping instrument can be discerned, such as, set up the mapping logic relation of the script sentence that object properties and object relationship Database Mapping instrument can discern in advance in object information converting unit 32, object information converting unit 32 is converted to the script that object relationship Database Mapping instrument can be discerned according to this mapping logic relation with described object and attribute information thereof, and described script is submitted to object relationship Database Mapping unit 33.
Object relationship Database Mapping unit 33 is used for according to the script of data of description object properties data object being persisted to database 30, can use existing object relationship Database Mapping instrument, such as, Hibernate, TopLink, iBatis etc.The difference of the object relationship Database Mapping instrument that uses according to object relationship Database Mapping unit 33, correspondingly, object information converting unit 32 is also different with the script of described object and attribute information conversion thereof, specifically can determine according to the object relationship Database Mapping instrument that practical object relational database map unit 33 is used.
With reference to Fig. 4, Fig. 4 is the theory diagram that the present invention is updated to object local attribute device second embodiment of relational database:
Different with apparatus of the present invention first embodiment shown in Figure 3 is, in this embodiment, also comprises mapping logic unit 34, and the mapping logic relation that provides object information converting unit 32 to change required object properties and script sentence is provided.Multiple different mapping logics relation can be stored in mapping logic unit 34, and the needs with the various object relationship Database Mapping instrument of adaption object relational database map unit 33 uses make things convenient for the user to select for use according to actual conditions.For this reason, interface corresponding to different object relationship Database Mapping instruments can be set in object information converting unit 32.Utilize this embodiment, can further improve the applicability of embodiment of the invention device.
With reference to Fig. 5, Fig. 5 is the theory diagram that the present invention is updated to object local attribute device the 3rd embodiment of relational database:
In this embodiment, comprising: object generation unit 51 and object information converting unit 52.Wherein, object generation unit 51 is used to create the more object and the attribute information thereof of new portion attribute.Object generation unit 51 is identical with object generation unit 31 among apparatus of the present invention first embodiment shown in Figure 3, comprising: user interactions subelement 511 and storing sub-units 512.Wherein, user interactions subelement 511 is used to provide user interface, and creates the more object of new portion attribute by described user interface, and the attribute assignment for needing in the described object to upgrade; Storing sub-units 512 is used to store described object and property value thereof.
Object information converting unit 52 is used for described object and attribute information thereof are converted to the SQL statement that relational database 50 can be discerned, and, realize the renewal of object properties in the relational database 50 by SQL statement being submitted to relational database 50 with the interface of relational database 50.
The difference of the programming language of supporting according to relational database 50, object information converting unit 52 is also different with the SQL statement of described object and attribute information conversion thereof, need be determined by concrete database.
With reference to Fig. 6, Fig. 6 is the theory diagram of device the 4th embodiment that data object upgrades in the relational database of the present invention:
Different with apparatus of the present invention the 3rd embodiment shown in Figure 5 is, in this embodiment, also comprises mapping logic unit 54, and the mapping logic relation that provides object information converting unit 52 to change required object properties and SQL statement is provided.Multiple different mapping logics relation can be stored in mapping logic unit 54, to adapt to the needs of different relational databases, makes things convenient for the user to select for use according to actual conditions.Utilize this embodiment, can further improve the applicability of apparatus of the present invention.
More than method and device that the embodiment of the invention provided are described in detail, used specific case herein embodiments of the present invention set forth, the explanation of above embodiment just is used for help understanding method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (12)
1, a kind of method that object local attribute is updated to relational database is characterized in that described method comprises:
Creating needs the more object of new portion attribute;
Be the attribute assignment that needs in the described object to upgrade;
Described object and attribute information thereof are converted to the script that object relationship Database Mapping instrument can be discerned;
Utilize described object relationship Database Mapping instrument that the information in the described script is persisted in the described relational database.
2, method according to claim 1 is characterized in that, described step for the attribute assignment that needs in the described object to upgrade comprises:
The Set method of utilizing object is to need the attribute assignment that upgrades in the described object.
According to the described method of claim 1, it is characterized in that 3, the described step that described object and attribute information thereof are converted to the script that object relationship Database Mapping instrument can discern comprises:
The mapping logic of the script sentence that can discern according to object properties of setting up in advance and described object relationship Database Mapping instrument concerns, described object and attribute information thereof are converted to the script that object relationship Database Mapping instrument can be discerned.
4, a kind of method that object local attribute is updated to relational database is characterized in that described method comprises:
Creating needs the more object of new portion attribute;
Be the attribute assignment that needs in the described object to upgrade;
Described object and attribute information thereof are converted to the SQL statement that described relational database can be discerned;
Carry out described SQL statement, finish the renewal of data object part attribute in the described relational database.
5, method according to claim 4 is characterized in that, described step for the attribute assignment that needs in the described object to upgrade comprises:
The Set method of utilizing object is to need the attribute assignment that upgrades in the described object.
6, method according to claim 4 is characterized in that, the described step that described object and attribute information thereof are converted to the SQL statement that described relational database can discern comprises:
Mapping logic relation according to object properties of setting up in advance and described SQL statement is converted to the SQL statement that described relational database can be discerned with described object and attribute information thereof.
7, a kind of device that object local attribute is updated to relational database comprises:
Object relationship Database Mapping unit is used for according to the script of data of description object properties data object being persisted to described relational database;
It is characterized in that described device also comprises:
Object generation unit is used to create the more object and the attribute information thereof of new portion attribute;
The object information converting unit is used for described object and attribute information thereof are converted to the script that object relationship Database Mapping instrument can be discerned, and described script is submitted to described object relationship Database Mapping unit.
8, device according to claim 7 is characterized in that, described object generation unit comprises:
The user interactions subelement is used to provide user interface, and creates the more object of new portion attribute by described user interface, and the attribute assignment for needing in the described object to upgrade;
Storing sub-units is used to store described object and property value thereof.
9, device according to claim 8 is characterized in that, described device also comprises:
The mapping logic relation that provides described object information converting unit to change required object properties and described script sentence is provided in the mapping logic unit.
10, a kind of device that object local attribute is updated to relational database is characterized in that described device comprises:
Object generation unit is used to create the more object and the attribute information thereof of new portion attribute;
The object information converting unit is used for described object and attribute information thereof are converted to the SQL statement that described relational database can be discerned, and SQL statement is submitted to described relational database.
11, device according to claim 10 is characterized in that, described object generation unit comprises:
The user interactions subelement is used to provide user interface, and creates the more object of new portion attribute by described user interface, and the attribute assignment for needing in the described object to upgrade;
Storing sub-units is used to store described object and property value thereof.
12, device according to claim 11 is characterized in that, described device also comprises:
The mapping logic relation that provides described extraction object information converting unit to change required object properties and described SQL statement is provided in the mapping logic unit.
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| CNB2007100875130A CN100489860C (en) | 2007-03-16 | 2007-03-16 | Method and apparatus for updating object local attribute to related database |
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| CN105868204A (en) * | 2015-01-21 | 2016-08-17 | 中国移动（深圳）有限公司 | Method and apparatus for converting script language SQL of Oracle |
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| CN105550263A (en) * | 2015-12-05 | 2016-05-04 | 百势软件(北京)有限公司 | Assignment method and device in object-relational mapping |
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