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org.apache.derby.iapi.types
Interface XMLDataValue  

All Superinterfaces:

DataValueDescriptor, java.io.Externalizable, org.apache.derby.iapi.services.io.Formatable, Orderable, java.io.Serializable, org.apache.derby.iapi.services.io.Storable, org.apache.derby.iapi.services.io.TypedFormat

All Known Implementing Classes:

XML

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public interface XMLDataValue

extends DataValueDescriptor

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Field Summary

 

Fields inherited from interface org.apache.derby.iapi.types.Orderable

ORDER_OP_EQUALS, ORDER_OP_GREATEROREQUALS, ORDER_OP_GREATERTHAN, ORDER_OP_LESSOREQUALS, ORDER_OP_LESSTHAN

 

Method Summary
boolean	exists(java.lang.String xExpr)           Helper method for XMLExists.
void	parseAndLoadXML(java.lang.String xmlText, boolean preserveWS)           Parse the received string value as XML.
BooleanDataValue	XMLExists(StringDataValue xExpr, XMLDataValue xml)           The SQL/XML XMLExists operator.
StringDataValue	XMLSerialize(StringDataValue result, int targetType, int targetWidth)           The SQL/XML XMLSerialize operator.

 

Methods inherited from interface org.apache.derby.iapi.types.DataValueDescriptor

checkHostVariable, coalesce, compare, compare, equals, estimateMemoryUsage, getBoolean, getByte, getBytes, getClone, getDate, getDouble, getFloat, getInt, getLength, getLong, getNewNull, getObject, getShort, getStream, getString, getTime, getTimestamp, getTypeName, greaterOrEquals, greaterThan, in, isNotNull, isNullOp, lessOrEquals, lessThan, normalize, notEquals, readExternalFromArray, setBigDecimal, setInto, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValueFromResultSet, typePrecedence, typeToBigDecimal

 

Methods inherited from interface org.apache.derby.iapi.services.io.Storable

isNull, restoreToNull

 

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

 

Methods inherited from interface org.apache.derby.iapi.services.io.TypedFormat

getTypeFormatId

 

Method Detail

parseAndLoadXML

public void parseAndLoadXML(java.lang.String xmlText,
                            boolean preserveWS)
                     throws org.apache.derby.iapi.error.StandardException

Parse the received string value as XML. If the parse succeeds, store the string value as the contents of this XML value.

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XMLSerialize

public StringDataValue XMLSerialize(StringDataValue result,
                                    int targetType,
                                    int targetWidth)
                             throws org.apache.derby.iapi.error.StandardException

The SQL/XML XMLSerialize operator. Converts this XML value into a string with a user-specified type, and returns that string via the received StringDataValue. (if the received StringDataValue is non-null and of the correct type; else, a new StringDataValue is returned).

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XMLExists

public BooleanDataValue XMLExists(StringDataValue xExpr,
                                  XMLDataValue xml)
                           throws org.apache.derby.iapi.error.StandardException

The SQL/XML XMLExists operator. Takes an XML query expression (as a string) and an XML value and checks if at least one node in the XML value matches the query expression. NOTE: For now, the query expression must be XPath only (XQuery not supported).

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exists

public boolean exists(java.lang.String xExpr)
               throws org.apache.derby.iapi.error.StandardException

Helper method for XMLExists. See if the received XPath expression returns at least one node when evaluated against _this_ XML value.

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