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java.lang.Object shared.HelperBaseCh4 shared.HelperBaseCh5 shared.HelperBaseCh6 ch6.complexPersistent.ControllerHelper
public class ControllerHelper
Saves the bean to a database. Hibernate will be initialised in the initHibernate method. The process method will save the data to the database and set the results of a query in the request, which can be retrieved in a bean. The bean will have additional annotations to save the complex form elements to the database.
Nested Class Summary |
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Nested classes/interfaces inherited from class shared.HelperBaseCh4 |
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HelperBaseCh4.SessionData |
Field Summary |
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Fields inherited from class shared.HelperBaseCh6 |
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checked, selected |
Fields inherited from class shared.HelperBaseCh4 |
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logger, request, response |
Constructor Summary | |
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ControllerHelper(javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response)
The only constructor for this class has parameters for the request and response objects. |
Method Summary | |
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java.lang.String |
confirmMethod()
The method that preforms the actions associated with the confirm button. |
void |
copyFromSession(java.lang.Object sessionHelper)
Most of the details for retrieving data from the session are implemented in the helper base class. |
protected void |
doGet()
This method will be called by the controller to finish processing the request. |
protected void |
doPost()
This method will be called by the controller to finish processing the request. |
java.lang.String |
editMethod()
The method that preforms the actions associated with the edit button. |
java.lang.Object |
getData()
Accessor that returns the bean. |
static void |
initHibernate(boolean create)
Uses properties to set the configuration parameters for Hibernate. |
protected java.lang.String |
jspLocation(java.lang.String page)
Generates the full path to a JSP. |
java.lang.String |
processMethod()
The method that preforms the actions associated with the process button. |
void |
resetNullable()
Certain form elements might not place data in the query string, if the user does not specify a value. |
Methods inherited from class shared.HelperBaseCh6 |
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addChecked, addChoice, addSelected, clearMaps, clearProperty, getChecked, getSelected, invokeGetter, setCheckedAndSelected, setCheckedAndSelected |
Methods inherited from class shared.HelperBaseCh5 |
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getErrors, isValid, isValidProperty, setErrors |
Methods inherited from class shared.HelperBaseCh4 |
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addHelperToSession, addHelperToSession, executeButtonMethod, executeButtonMethod, fillBeanFromRequest, invokeButtonMethod, populateThrow, writeError |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ControllerHelper(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
request
- The object that encapsulates the request
information that is needed to communicate
with the browser.response
- The object that encapsulates the response
information that is needed to communicate
with the browser.Method Detail |
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public static void initHibernate(boolean create)
create
- If there is an initilization parameter named 'create' in the
web.xml file, then its value will be sent to this method.
If it is true, then it means that the table for the
bean should be created in the database.public java.lang.Object getData()
public void copyFromSession(java.lang.Object sessionHelper)
copyFromSession
in class HelperBaseCh4
sessionHelper
- The object that represents the controller helper that
was added to the session in the previous request.
During each request, the controller helper is placed in the session. Before that happens, the controller helper from the previous request can be retrieved from the session. This object is retrieved in the helper base class and sent to the implementation of this abstract method.
public void resetNullable()
Use this method to call the setters for all nullable fields and clear any old values.
protected java.lang.String jspLocation(java.lang.String page)
page
- The name of the JSP. This will be appended to the
path of the directory that contains the JSPs. Using
this method forces all the JSPs to be in the same
directory.
public java.lang.String editMethod()
public java.lang.String confirmMethod()
public java.lang.String processMethod()
protected void doGet() throws javax.servlet.ServletException, java.io.IOException
GET requests will be treated as first requests to the application. Previous data will not be retrieved from the session and the edit page will always be displayed.
doGet
in class HelperBaseCh4
javax.servlet.ServletException
- A servlet exception is a severe error
and means that processing cannot continue.
java.io.IOException
- An IO exception is a severe error
and means that processing cannot continue.protected void doPost() throws javax.servlet.ServletException, java.io.IOException
POST requests will implement the controller logic that has been in all previous controllers.
doPost
in class HelperBaseCh4
javax.servlet.ServletException
- A servlet exception is a severe error
and means that processing cannot continue.
java.io.IOException
- An IO exception is a severe error
and means that processing cannot continue.
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