ajax.catalog
Class EmbeddedQuery

java.lang.Object
  |
  +--ajax.catalog.Transformation
        |
        +--ajax.catalog.EmbeddedQuery

All Implemented Interfaces:

CatalogObject

public class EmbeddedQuery

extends Transformation

Fields inherited from class ajax.catalog.Transformation

CLUST, DBTransferStr, dirExec, dirFiles, dirFunctions, embeddedOutput, endEvaluateHeader, evaluateHeader, evaluateTail, exceptionOutput, FROM_FILE, FROM_TABLE, generatedCodeType, ifTail, importIOException, importList, importRunnableTransf, importSqlException, importSqlResultSet, importWrapperException, importWrapperManager, inputType, JAVA_CODE, MAPP, MATCH, MERG, newLine, outerOutput, outputType, SQL_CODE, tail, TO_FILE, TO_TABLE, transfType, VIEW, wrapperInitialization

Constructor Summary

EmbeddedQuery(java.lang.String outputName, Transformation context)
The ctor of this class.

Method Summary

void	asArrayToJava(java.io.Writer outStream, Expression variable) This method translates an EmbeddedQuery object into Java code when the EmbeddedQuery corresponds to a query whose result is assigned to a variable declared in the LET clause of the context transformation.
void	init(java.util.List outerFrom) Fills in the components of a mapping transformation.
void	set(java.util.LinkedList output, java.util.List from, Expression where) Set some attributes of this class.
java.lang.String	toHtml() Converts the EmbeddedQuery to html format.
void	toJavaBody(java.io.Writer outStream) functions that writes the body of this transformation using the Java language.
protected void	toJavaBody(java.io.Writer outStream, Table[] matTable) Generates code for executing the body of the transformation We are using the exception table of the context transformation to store possible exceptions that may arise in the execution of this transformation.
java.lang.String	toString() Converts the EmbeddedQuery into a human read-able object.
void	toXML(java.lang.String XMLfileName) Converts the transformation into an XML document

Methods inherited from class ajax.catalog.Transformation

addAsList, addEmbeddedQuery, closeFile, closeOutputFiles, closeOutputJdbc, createOutputFiles, createOutputTables, declareTransfer, doOuterJoinInSQL, dump, dumpQuery, exceptionsToJava, fromToSQL, getAllOutputNames, getExceptionsLet, getExceptionTable, getFields, getFieldType, getFrom, getIndex, getIndexAttribute, getInputNames, getInputTable, getKey, getKeyAs, getLet, getMatTable, getName, getOutput, getOutput, getOutputException, getOutputNames, getOutputSize, getOutputTable, getTable, getTransfType, getWhere, hasNullConstraint, init, initialize, isClustering, isFromTable, isLetOptimizableDE, isLetToSQL, isMapping, isMatching, isMerging, isToSQL, isToTable, isTransformation, isView, KeyExceptionToJava, letToJava, load, main, openFile, outerOutputIter, selectToJava, selectToSQL, selectToSQLToTable, setExceptionOutput, setFromFile, setFromTable, setName, setOuterOutput, setToFile, setToJava, setToSQL, setToTable, setWeaveOutputsSchemas, setWeaveRunTimePolicies, toJava, toJavaFromInput, toJavaQuery, toSQL, toTableQuery, updateAuxiliaryFunctions, whereToJava, whereToSQL, writeCollection, writeHtmlCollection, writeTailClass

Methods inherited from class java.lang.Object

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

Constructor Detail

EmbeddedQuery

public EmbeddedQuery(java.lang.String outputName,
                     Transformation context)

The ctor of this class.

Method Detail

set

public final void set(java.util.LinkedList output,
                      java.util.List from,
                      Expression where)

Set some attributes of this class.

init

public void init(java.util.List outerFrom)
          throws CatalogException,
                 AjaxTypeException

Fills in the components of a mapping transformation. This method is called after the context transformation have been initialized.

toJavaBody

public final void toJavaBody(java.io.Writer outStream)
                      throws CatalogException,
                             java.io.IOException,
                             ExpressionException,
                             AjaxTypeException

functions that writes the body of this transformation using the Java language.

toJavaBody

protected void toJavaBody(java.io.Writer outStream,
                          Table[] matTable)
                   throws CatalogException,
                          java.io.IOException,
                          ExpressionException,
                          AjaxTypeException

Generates code for executing the body of the transformation We are using the exception table of the context transformation to store possible exceptions that may arise in the execution of this transformation.

Overrides:

toJavaBody in class Transformation

asArrayToJava

public void asArrayToJava(java.io.Writer outStream,
                          Expression variable)
                   throws CatalogException,
                          java.io.IOException,
                          ExpressionException,
                          AjaxTypeException

This method translates an EmbeddedQuery object into Java code when the EmbeddedQuery corresponds to a query whose result is assigned to a variable declared in the LET clause of the context transformation. This solution only works for embedded queries which "return" arrays of strings. For other types of return (Integer, Float, ...), we need to change the method toJava (or to use a different one) of expression in order use the getObject(index) instead of using getString, getInt, ... .

Parameters:

variable - is the variable which describe the expression that contains the assignment of this embedded query.

toXML

public void toXML(java.lang.String XMLfileName)

Converts the transformation into an XML document

Overrides:

toXML in class Transformation

toString

public java.lang.String toString()

Converts the EmbeddedQuery into a human read-able object.

Overrides:

toString in class Transformation

toHtml

public java.lang.String toHtml()

Converts the EmbeddedQuery to html format.

Overrides:

toHtml in class Transformation