org.modeshape.jdbc

Class JcrResultSetMetaData

java.lang.Object

org.modeshape.jdbc.JcrResultSetMetaData

All Implemented Interfaces:

ResultSetMetaData, Wrapper

public class JcrResultSetMetaData
extends Object
implements ResultSetMetaData

This driver's ResultSetMetaData implementation that obtains the metadata information from the JCR query result and (where possible) the column's corresponding property definitions.

Field Summary

Fields inherited from interface java.sql.ResultSetMetaData

columnNoNulls, columnNullable, columnNullableUnknown

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JcrResultSetMetaData(JcrConnection connection, QueryResult results)

Method Summary

Modifier and Type	Method and Description
String	getCatalogName(int column) All columns come from the same repository (i.e., catalog).
String	getColumnClassName(int column)
int	getColumnCount()
int	getColumnDisplaySize(int column) This method returns the nominal display size based upon the column's type.
String	getColumnLabel(int column)
String	getColumnName(int column)
int	getColumnType(int column)
String	getColumnTypeName(int column)
int	getPrecision(int column) This method always returns the nominal display size for the type.
int	getScale(int column) This method returns the number of digits behind the decimal point, which is assumed to be 3 if the type is PropertyType.DOUBLE or 0 otherwise.
String	getSchemaName(int column) This method always returns the workspace name.
String	getTableName(int column)
boolean	isAutoIncrement(int column) This method always returns false, since this JCR property types don't represent auto-incremented values.
boolean	isCaseSensitive(int column)
boolean	isCurrency(int column) This method always returns false, since no JCR property types (directly) represent currency.
boolean	isDefinitelyWritable(int column) This method always returns false, since this JDBC driver does not support writes.
int	isNullable(int column)
boolean	isReadOnly(int column) Even though the value may be writable in the JCR repository, this JDBC driver does not support writes.
boolean	isSearchable(int column) In JCR-SQL2, every property can be used in a WHERE clause.
boolean	isSigned(int column) This method returns true if the column is a PropertyType.DOUBLE, PropertyType.LONG or PropertyType.DATE.
boolean	isWrapperFor(Class<?> iface)
boolean	isWritable(int column) Even though the value may be writable in the JCR repository, this JDBC driver does not support writes.
<T> T	unwrap(Class<T> iface)

Methods inherited from class java.lang.Object

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

Constructor Detail

JcrResultSetMetaData

protected JcrResultSetMetaData(JcrConnection connection,
                               QueryResult results)

Method Detail

getCatalogName

public String getCatalogName(int column)

All columns come from the same repository (i.e., catalog).

Specified by:

getCatalogName in interface ResultSetMetaData

See Also:

ResultSetMetaData.getCatalogName(int)

getColumnClassName

public String getColumnClassName(int column)

Specified by:

getColumnClassName in interface ResultSetMetaData

getColumnCount

public int getColumnCount()
                   throws SQLException

Specified by:

getColumnCount in interface ResultSetMetaData

Throws:

SQLException

getColumnDisplaySize

public int getColumnDisplaySize(int column)

This method returns the nominal display size based upon the column's type. Therefore, the value may not reflect the optimal display size for any given value.

Specified by:

getColumnDisplaySize in interface ResultSetMetaData

See Also:

ResultSetMetaData.getColumnDisplaySize(int)

getColumnLabel

public String getColumnLabel(int column)
                      throws SQLException

Specified by:

getColumnLabel in interface ResultSetMetaData

Throws:

SQLException

getColumnName

public String getColumnName(int column)
                     throws SQLException

Specified by:

getColumnName in interface ResultSetMetaData

Throws:

SQLException

getColumnType

public int getColumnType(int column)

Specified by:

getColumnType in interface ResultSetMetaData

getColumnTypeName

public String getColumnTypeName(int column)

Specified by:

getColumnTypeName in interface ResultSetMetaData

getPrecision

public int getPrecision(int column)

This method always returns the nominal display size for the type.

Specified by:

getPrecision in interface ResultSetMetaData

See Also:

ResultSetMetaData.getPrecision(int)

getScale

public int getScale(int column)

This method returns the number of digits behind the decimal point, which is assumed to be 3 if the type is PropertyType.DOUBLE or 0 otherwise.

Specified by:

getScale in interface ResultSetMetaData

See Also:

ResultSetMetaData.getScale(int)

getSchemaName

public String getSchemaName(int column)

This method always returns the workspace name.

Specified by:

getSchemaName in interface ResultSetMetaData

See Also:

ResultSetMetaData.getSchemaName(int)

getTableName

public String getTableName(int column)
                    throws SQLException

Specified by:

getTableName in interface ResultSetMetaData

Throws:

SQLException

isAutoIncrement

public boolean isAutoIncrement(int column)

This method always returns false, since this JCR property types don't represent auto-incremented values.

Specified by:

isAutoIncrement in interface ResultSetMetaData

See Also:

ResultSetMetaData.isAutoIncrement(int)

isCaseSensitive

public boolean isCaseSensitive(int column)

Specified by:

isCaseSensitive in interface ResultSetMetaData

isCurrency

public boolean isCurrency(int column)

This method always returns false, since no JCR property types (directly) represent currency.

Specified by:

isCurrency in interface ResultSetMetaData

See Also:

ResultSetMetaData.isCurrency(int)

isDefinitelyWritable

public boolean isDefinitelyWritable(int column)

This method always returns false, since this JDBC driver does not support writes.

Specified by:

isDefinitelyWritable in interface ResultSetMetaData

See Also:

ResultSetMetaData.isDefinitelyWritable(int)

isNullable

public int isNullable(int column)
               throws SQLException

Specified by:

isNullable in interface ResultSetMetaData

Throws:

SQLException

isReadOnly

public boolean isReadOnly(int column)

Even though the value may be writable in the JCR repository, this JDBC driver does not support writes. Therefore, this method always returns true.

Specified by:

isReadOnly in interface ResultSetMetaData

See Also:

ResultSetMetaData.isReadOnly(int)

isSearchable

public boolean isSearchable(int column)

In JCR-SQL2, every property can be used in a WHERE clause. Therefore, this method always returns true.

Specified by:

isSearchable in interface ResultSetMetaData

See Also:

ResultSetMetaData.isSearchable(int)

isSigned

public boolean isSigned(int column)

This method returns true if the column is a PropertyType.DOUBLE, PropertyType.LONG or PropertyType.DATE.

Specified by:

isSigned in interface ResultSetMetaData

See Also:

ResultSetMetaData.isSigned(int)

isWritable

public boolean isWritable(int column)

Even though the value may be writable in the JCR repository, this JDBC driver does not support writes. Therefore, this method always returns false.

Specified by:

isWritable in interface ResultSetMetaData

See Also:

ResultSetMetaData.isWritable(int)

isWrapperFor

public boolean isWrapperFor(Class<?> iface)

Specified by:

isWrapperFor in interface Wrapper

unwrap

public <T> T unwrap(Class<T> iface)
             throws SQLException

Specified by:

unwrap in interface Wrapper

Throws:

SQLException