Package org.apache.derby.impl.jdbc

Class EmbedParameterSetMetaData

  • All Implemented Interfaces:
    java.sql.ParameterMetaData, java.sql.Wrapper
    public class EmbedParameterSetMetaData
extends java.lang.Object
implements java.sql.ParameterMetaData
    This class implements the ParameterMetaData interface from JDBC 3.0.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private int paramCount  
      private ParameterValueSet pvs  
      private DataTypeDescriptor[] types  

      • Fields inherited from interface java.sql.ParameterMetaData

        parameterModeIn, parameterModeInOut, parameterModeOut, parameterModeUnknown, parameterNoNulls, parameterNullable, parameterNullableUnknown

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      private void checkPosition​(int parameterIndex)  
      java.lang.String getParameterClassName​(int param)
      Retrieves the fully-qualified name of the Java class whose instances should be passed to the method PreparedStatement.setObject.
      int getParameterCount()
      Retrieves the number of parameters in the PreparedStatement object for which this ParameterMetaData object contains information.
      int getParameterMode​(int param)
      Retrieves the designated parameter's mode.
      int getParameterType​(int param)
      Retrieves the designated parameter's SQL type.
      java.lang.String getParameterTypeName​(int param)
      Retrieves the designated parameter's database-specific type name.
      int getPrecision​(int param)
      Retrieves the designated parameter's number of decimal digits.
      int getScale​(int param)
      Retrieves the designated parameter's number of digits to right of the decimal point.
      int isNullable​(int param)
      Retrieves whether null values are allowed in the designated parameter.
      boolean isSigned​(int param)
      Retrieves whether values for the designated parameter can be signed numbers.
      boolean isWrapperFor​(java.lang.Class<?> iface)
      Returns false unless iface is implemented.
      <T> T unwrap​(java.lang.Class<T> iface)
      Returns this if this class implements the specified interface.

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • getParameterCount

        public int getParameterCount()
        Retrieves the number of parameters in the PreparedStatement object for which this ParameterMetaData object contains information.
        Specified by:
        getParameterCount in interface java.sql.ParameterMetaData
        Returns:
        the number of parameters

      • isNullable

        public int isNullable​(int param)
               throws java.sql.SQLException
        Retrieves whether null values are allowed in the designated parameter.
        Specified by:
        isNullable in interface java.sql.ParameterMetaData
        Parameters:
        param - - the first parameter is 1, the second is 2, ...
        Returns:
        the nullability status of the given parameter; one of ParameterMetaData.parameterNoNulls, ParameterMetaData.parameterNullable, or ParameterMetaData.parameterNullableUnknown
        Throws:
        java.sql.SQLException - if a database access error occurs

      • isSigned

        public boolean isSigned​(int param)
                 throws java.sql.SQLException
        Retrieves whether values for the designated parameter can be signed numbers.
        Specified by:
        isSigned in interface java.sql.ParameterMetaData
        Parameters:
        param - - the first parameter is 1, the second is 2, ...
        Returns:
        true if it can be signed numbers
        Throws:
        java.sql.SQLException - if a database access error occurs

      • getPrecision

        public int getPrecision​(int param)
                 throws java.sql.SQLException
        Retrieves the designated parameter's number of decimal digits.
        Specified by:
        getPrecision in interface java.sql.ParameterMetaData
        Parameters:
        param - - the first parameter is 1, the second is 2, ...
        Returns:
        precision
        Throws:
        java.sql.SQLException - if a database access error occurs

      • getScale

        public int getScale​(int param)
             throws java.sql.SQLException
        Retrieves the designated parameter's number of digits to right of the decimal point.
        Specified by:
        getScale in interface java.sql.ParameterMetaData
        Parameters:
        param - - the first parameter is 1, the second is 2, ...
        Returns:
        scale
        Throws:
        java.sql.SQLException - if a database access error occurs

      • getParameterType

        public int getParameterType​(int param)
                     throws java.sql.SQLException
        Retrieves the designated parameter's SQL type.
        Specified by:
        getParameterType in interface java.sql.ParameterMetaData
        Parameters:
        param - - the first parameter is 1, the second is 2, ...
        Returns:
        SQL type from java.sql.Types
        Throws:
        java.sql.SQLException - if a database access error occurs

      • getParameterTypeName

        public java.lang.String getParameterTypeName​(int param)
                                      throws java.sql.SQLException
        Retrieves the designated parameter's database-specific type name.
        Specified by:
        getParameterTypeName in interface java.sql.ParameterMetaData
        Parameters:
        param - - the first parameter is 1, the second is 2, ...
        Returns:
        type the name used by the database. If the parameter type is a user-defined type, then a fully-qualified type name is returned.
        Throws:
        java.sql.SQLException - if a database access error occurs

      • getParameterClassName

        public java.lang.String getParameterClassName​(int param)
                                       throws java.sql.SQLException
        Retrieves the fully-qualified name of the Java class whose instances should be passed to the method PreparedStatement.setObject.
        Specified by:
        getParameterClassName in interface java.sql.ParameterMetaData
        Parameters:
        param - - the first parameter is 1, the second is 2, ...
        Returns:
        the fully-qualified name of the class in the Java programming language that would be used by the method PreparedStatement.setObject to set the value in the specified parameter. This is the class name used for custom mapping.
        Throws:
        java.sql.SQLException - if a database access error occurs

      • getParameterMode

        public int getParameterMode​(int param)
                     throws java.sql.SQLException
        Retrieves the designated parameter's mode.
        Specified by:
        getParameterMode in interface java.sql.ParameterMetaData
        Parameters:
        param - - the first parameter is 1, the second is 2, ...
        Returns:
        mode of the parameter; one of ParameterMetaData.parameterModeIn, ParameterMetaData.parameterModeOut, or ParameterMetaData.parameterModeInOut ParameterMetaData.parameterModeUnknown.
        Throws:
        java.sql.SQLException - if a database access error occurs

      • checkPosition

        private void checkPosition​(int parameterIndex)
                    throws java.sql.SQLException
        Throws:
        java.sql.SQLException

      • isWrapperFor

        public boolean isWrapperFor​(java.lang.Class<?> iface)
                     throws java.sql.SQLException
        Returns false unless iface is implemented.
        Specified by:
        isWrapperFor in interface java.sql.Wrapper
        Parameters:
        iface - a class defining an interface
        Returns:
        true if this implements the interface or directly or indirectly wraps an object that does
        Throws:
        java.sql.SQLException - if an error occurs while determining whether this is a wrapper for an object with the given interface.

      • unwrap

        public <T> T unwrap​(java.lang.Class<T> iface)
             throws java.sql.SQLException
        Returns this if this class implements the specified interface.
        Specified by:
        unwrap in interface java.sql.Wrapper
        Parameters:
        iface - a class defining an interface
        Returns:
        an object that implements the interface
        Throws:
        java.sql.SQLException - if no object is found that implements the interface