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org.apache.taglibs.standard.tag.common.sql
Class QueryTagSupport  

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      javax.servlet.jsp.tagext.BodyTagSupport
          org.apache.taglibs.standard.tag.common.sql.QueryTagSupport

All Implemented Interfaces:

javax.servlet.jsp.tagext.BodyTag, javax.servlet.jsp.tagext.IterationTag, javax.servlet.jsp.tagext.JspTag, java.io.Serializable, javax.servlet.jsp.jstl.sql.SQLExecutionTag, javax.servlet.jsp.tagext.Tag, javax.servlet.jsp.tagext.TryCatchFinally

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public abstract class QueryTagSupport

extends javax.servlet.jsp.tagext.BodyTagSupport

implements javax.servlet.jsp.tagext.TryCatchFinally, javax.servlet.jsp.jstl.sql.SQLExecutionTag

Tag handler for <Query> in JSTL.

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Field Summary
private  java.sql.Connection	conn
protected  boolean	dataSourceSpecified
private  boolean	isPartOfTransaction
protected  int	maxRows
protected  boolean	maxRowsSpecified
private  java.util.List	parameters
protected  java.lang.Object	rawDataSource
private  int	scope
protected  java.lang.String	sql
protected  int	startRow
private  java.lang.String	var

 

Fields inherited from class javax.servlet.jsp.tagext.BodyTagSupport

bodyContent

 

Fields inherited from class javax.servlet.jsp.tagext.TagSupport

id, pageContext

 

Fields inherited from interface javax.servlet.jsp.tagext.BodyTag

EVAL_BODY_BUFFERED, EVAL_BODY_TAG

 

Fields inherited from interface javax.servlet.jsp.tagext.IterationTag

EVAL_BODY_AGAIN

 

Fields inherited from interface javax.servlet.jsp.tagext.Tag

EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE

 

Constructor Summary

QueryTagSupport()

 

Method Summary
void	addSQLParameter(java.lang.Object o)           Called by nested parameter elements to add PreparedStatement parameter values.
void	doCatch(java.lang.Throwable t)           Just rethrows the Throwable.
int	doEndTag()           Execute the SQL statement, set either through the sql attribute or as the body, and save the result as a variable named by the var attribute in the scope specified by the scope attribute, as an object that implements the Result interface.
void	doFinally()           Close the Connection, unless this action is used as part of a transaction.
int	doStartTag()           Prepares for execution by setting the initial state, such as getting the Connection
private  java.sql.Connection	getConnection()
private  void	init()
private  void	setParameters(java.sql.PreparedStatement ps, java.util.List parameters)
void	setScope(java.lang.String scopeName)           Setter method for the scope of the variable to hold the result.
void	setVar(java.lang.String var)           Setter method for the name of the variable to hold the result.

 

Methods inherited from class javax.servlet.jsp.tagext.BodyTagSupport

doAfterBody, doInitBody, getBodyContent, getPreviousOut, release, setBodyContent

 

Methods inherited from class javax.servlet.jsp.tagext.TagSupport

findAncestorWithClass, getId, getParent, getValue, getValues, removeValue, setId, setPageContext, setParent, setValue

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Methods inherited from interface javax.servlet.jsp.tagext.Tag

getParent, setPageContext, setParent

 

Field Detail

var

private java.lang.String var

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scope

private int scope

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rawDataSource

protected java.lang.Object rawDataSource

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dataSourceSpecified

protected boolean dataSourceSpecified

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sql

protected java.lang.String sql

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maxRows

protected int maxRows

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maxRowsSpecified

protected boolean maxRowsSpecified

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startRow

protected int startRow

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conn

private java.sql.Connection conn

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parameters

private java.util.List parameters

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isPartOfTransaction

private boolean isPartOfTransaction

Constructor Detail

QueryTagSupport

public QueryTagSupport()

Method Detail

init

private void init()

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setVar

public void setVar(java.lang.String var)

Setter method for the name of the variable to hold the result.

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setScope

public void setScope(java.lang.String scopeName)

Setter method for the scope of the variable to hold the result.

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addSQLParameter

public void addSQLParameter(java.lang.Object o)

Called by nested parameter elements to add PreparedStatement parameter values.

Specified by:

addSQLParameter in interface javax.servlet.jsp.jstl.sql.SQLExecutionTag

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doStartTag

public int doStartTag()
               throws javax.servlet.jsp.JspException

Prepares for execution by setting the initial state, such as getting the Connection

Specified by:

doStartTag in interface javax.servlet.jsp.tagext.Tag

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doEndTag

public int doEndTag()
             throws javax.servlet.jsp.JspException

Execute the SQL statement, set either through the sql attribute or as the body, and save the result as a variable named by the var attribute in the scope specified by the scope attribute, as an object that implements the Result interface.

The connection used to execute the statement comes either from the DataSource specified by the dataSource attribute, provided by a parent action element, or is retrieved from a JSP scope attribute named javax.servlet.jstl.sql.dataSource.

Specified by:

doEndTag in interface javax.servlet.jsp.tagext.Tag

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doCatch

public void doCatch(java.lang.Throwable t)
             throws java.lang.Throwable

Just rethrows the Throwable.

Specified by:

doCatch in interface javax.servlet.jsp.tagext.TryCatchFinally

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doFinally

public void doFinally()

Close the Connection, unless this action is used as part of a transaction.

Specified by:

doFinally in interface javax.servlet.jsp.tagext.TryCatchFinally

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getConnection

private java.sql.Connection getConnection()
                                   throws javax.servlet.jsp.JspException,
                                          java.sql.SQLException

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setParameters

private void setParameters(java.sql.PreparedStatement ps,
                           java.util.List parameters)
                    throws java.sql.SQLException

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> taglibs >> standard >> tag >> common >> [ sql overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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