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ObjectAbstractFIDMapper
MaxIncFIDMapper
public class MaxIncFIDMapper
A FID mapper that uses a single integer column as the primary key and that
does a SELECT MAX(fixColumn) + 1
to generate new ones. This is
a fragile generation strategy, better use a sequence or a serial to get
reliable results.
Field Summary |
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Fields inherited from class AbstractFIDMapper |
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autoIncrement, colDecimalDigits, colNames, colSizes, colTypes, returnFIDColumnsAsAttributes, tableName, tableSchemaName |
Constructor Summary | |
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MaxIncFIDMapper(String tableName,
String FIDColumn,
int FIDColumnType)
Creates a new MaxIncFIDMapper object. |
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MaxIncFIDMapper(String tableSchemaName,
String tableName,
String FIDColumn,
int FIDColumnType,
boolean returnFIDColumnsAsAttributes)
Creates a new MaxIncFIDMapper object that will return the FID columns as business attributes. |
Method Summary | |
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String |
createID(Connection conn,
SimpleFeature feature,
Statement statement)
Creates a new ID for a feature. |
boolean |
equals(Object object)
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String |
getID(Object[] attributes)
Returns the FID given the values of the prymary key attributes |
Object[] |
getPKAttributes(String FID)
Creates the value for the PK attributes given the feature. |
boolean |
isValid(String fid)
Provides a simple means of assessing if a feature id is structurally valid with respect to the fids this FIDMapper creates. |
Methods inherited from class Object |
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clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public MaxIncFIDMapper(String tableName, String FIDColumn, int FIDColumnType)
tableName
- the table nameFIDColumn
- the name of the FID columnFIDColumnType
- The SQL type of the column - must be a numeric typepublic MaxIncFIDMapper(String tableSchemaName, String tableName, String FIDColumn, int FIDColumnType, boolean returnFIDColumnsAsAttributes)
tableSchemaName
- the schema of this tabletableName
- the table nameFIDColumn
- the name of the FID columnFIDColumnType
- The SQL type of the column - must be a numeric typereturnFIDColumnsAsAttributes
- true to return FID columns as
attributes.Method Detail |
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public String getID(Object[] attributes)
FIDMapper
attributes
- DOCUMENT ME!FIDMapper.getID(java.lang.Object[])
public Object[] getPKAttributes(String FID)
FIDMapper
FID
- The feature ID is going to be parsedFIDMapper.getPKAttributes(java.lang.String)
public boolean equals(Object object)
equals
in class Object
Object.equals(java.lang.Object)
public String createID(Connection conn, SimpleFeature feature, Statement statement) throws IOException
FIDMapper
conn
- - the database connectionfeature
- - the feature that needs the new FIDstatement
- - the statement used to insert the feature into the
database
IOException
org.geotools.data.jdbc.fidmapper.FIDMapper#createID(java.sql.Connection,
Feature, Statement)
public boolean isValid(String fid)
FIDMapper
The primary purpose of this method is to help in filtering out fids from filters that are not appropriate for a given FeatureType but that may otherwise being treated as valid if they get down to the actual SQL query.
The validity check may be as strict or as loose as the concrete FIDMapper wishes, since there may be cases where whether a fid in a filter is valid or not is not that important, or where it may result in deleting a Feature that was not expected to be deleted.
An example of such a need for validation may be a feature id composed like <featureTypeName>.<number>
, where the actual table PK is just the <number>
part. If
a request over the FeatureType "ft1" is made with a fid filter like ft2.1
, this
method can ensure the number 1
is not send out in the SQL query at all.
fid
- a feature id to check for structural validity
true
if fid can be parsed as a long, as the fids generated by this FIDMapper
can, false
othwerwiseFIDMapper.isValid(String)
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