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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.iapi.types   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.derby.iapi.types.DataType All known Subclasses:   org.apache.derby.iapi.types.XML,  org.apache.derby.iapi.types.SQLBoolean,  org.apache.derby.iapi.types.NumberDataType,  org.apache.derby.iapi.types.UserType,  org.apache.derby.iapi.types.SQLDate,  org.apache.derby.iapi.types.SQLChar,  org.apache.derby.impl.store.access.StorableFormatId,  org.apache.derby.iapi.types.SQLRef,  org.apache.derby.iapi.types.SQLTime,  org.apache.derby.impl.store.access.heap.HeapRowLocation,  org.apache.derby.impl.store.access.conglomerate.GenericConglomerate,  org.apache.derby.iapi.types.SQLTimestamp,  org.apache.derby.iapi.types.SQLBinary, DataType abstract public class DataType implements DataValueDescriptor,CloneableObject(Code) DataType is the superclass for all data types. It provides common behavior for datavalue descriptors -- it throws exceptions for all of the get* and setvalue(*) methods of DataValueDescriptor; the subtypes need only override the one for the type they represent and all types it can also be returned as, and the methods dealing with nulls. Since all types satisfy getString DataType does not define that interfaces of DataValueDescriptor. DataType is a little glue for columns to hold values with. Method Summary public  void checkHostVariable(int declaredLength)      Check the value to seem if it conforms to the restrictions imposed by DB2/JCC on host variables for this type. public  Object cloneObject()      public  DataValueDescriptor coalesce(DataValueDescriptor[] argumentsList, DataValueDescriptor returnValue)      public  boolean compare(int op, DataValueDescriptor other, boolean orderedNulls, boolean unknownRV)      final protected  StandardException dataTypeConversion(String targetType)      Return an conversion exception from this type to another. public  BooleanDataValue equals(DataValueDescriptor left, DataValueDescriptor right)      The = operator as called from the language module, as opposed to the storage module. public  boolean equals(Object other)      protected static  int flip(int operator)      Flip the operator used in a comparison (< -> >). This is useful when flipping a comparison due to type precedence. Parameters:   operator - The operator to flip.  void genericSetObject(Object theValue)      public  boolean getBoolean()      Gets the value in the data value descriptor as a boolean. public  byte getByte()      Gets the value in the data value descriptor as a byte. public  byte[] getBytes()      Gets the value in the data value descriptor as a byte[]. public  Date getDate(Calendar cal)      Gets the value in the data value descriptor as a java.sql.Date. public  double getDouble()      Gets the value in the data value descriptor as a double. public  float getFloat()      Gets the value in the data value descriptor as a float. public  int getInt()      Gets the value in the data value descriptor as a int. public  long getLong()      Gets the value in the data value descriptor as a long. protected  String getNationalString(LocaleFinder localeFinder)      International version of getString(). public  Object getObject()      Gets the value in the data value descriptor as a int. public  short getShort()      Gets the value in the data value descriptor as a short. public  InputStream getStream()      Gets the value in the data stream descriptor as an InputStream. public  Time getTime(Calendar cal)      Gets the value in the data value descriptor as a java.sql.Time. public  Timestamp getTimestamp(Calendar cal)      Gets the value in the data value descriptor as a java.sql.Timestamp. public  String getTraceString()      Gets the value in the data stream descriptor as a trace string.  String getTypeName(String className)      Get the type name of this value, possibly overriding with the passed in class name (for user/java types). public  BooleanDataValue greaterOrEquals(DataValueDescriptor left, DataValueDescriptor right)      The >= operator as called from the language module, as opposed to the storage module. public  BooleanDataValue greaterThan(DataValueDescriptor left, DataValueDescriptor right)      The > operator as called from the language module, as opposed to the storage module. public  BooleanDataValue in(DataValueDescriptor left, DataValueDescriptor[] inList, boolean orderedList)      final protected  StandardException invalidFormat()      Return an out of range exception for this type. final public  BooleanDataValue isNotNull()      The is not null operator as called from the language module, as opposed to the storage module. final public  BooleanDataValue isNullOp()      The is null operator as called from the language module, as opposed to the storage module. public  BooleanDataValue lessOrEquals(DataValueDescriptor left, DataValueDescriptor right)      The <= operator as called from the language module, as opposed to the storage module. public  BooleanDataValue lessThan(DataValueDescriptor left, DataValueDescriptor right)      The < operator as called from the language module, as opposed to the storage module. public  void normalize(DataTypeDescriptor desiredType, DataValueDescriptor source)      Default normalization method. public  BooleanDataValue notEquals(DataValueDescriptor left, DataValueDescriptor right)      The <> operator as called from the language module, as opposed to the storage module. final protected  StandardException outOfRange()      Return an out of range exception for this type. public  void setBigDecimal(Number bigDecimal)      protected  void setFrom(DataValueDescriptor dvd)      Set the value of this DataValueDescriptor based on the value of the specified DataValueDescriptor. public  void setInto(PreparedStatement ps, int position)      public  void setInto(ResultSet rs, int position)      Set this value into a ResultSet for a subsequent ResultSet.insertRow or ResultSet.updateRow.  void setObject(Object theValue)      Set the value from an non-null object. public  void setObjectForCast(Object theValue, boolean instanceOfResultType, String resultTypeClassName)      public  void setToNull()      public  void setValue(Time theValue)      Set the value of this DataValueDescriptor. public  void setValue(Time theValue, Calendar cal)      Set the value of this DataValueDescriptor. public  void setValue(Timestamp theValue)      Set the value of this DataValueDescriptor. public  void setValue(Timestamp theValue, Calendar cal)      Set the value of this DataValueDescriptor. public  void setValue(Date theValue)      Set the value of this DataValueDescriptor. public  void setValue(Date theValue, Calendar cal)      Set the value of this DataValueDescriptor. public  void setValue(String theValue)      Set the value of this DataValueDescriptor. public  void setValue(int theValue)      public  void setValue(double theValue)      public  void setValue(float theValue)      public  void setValue(short theValue)      public  void setValue(long theValue)      public  void setValue(byte theValue)      public  void setValue(boolean theValue)      Set the value. public  void setValue(byte[] theValue)      Set the value of this DataValueDescriptor. final public  void setValue(DataValueDescriptor dvd)      public  void setValue(InputStream theStream, int valueLength)      public  void throwLangSetMismatch(Object value)       void throwLangSetMismatch(String argTypeName)      public  int typePrecedence()      Each built-in type in JSQL has a precedence. public  int typeToBigDecimal()      Method Detail checkHostVariable public void checkHostVariable(int declaredLength) throws StandardException(Code) Check the value to seem if it conforms to the restrictions imposed by DB2/JCC on host variables for this type. exception:   StandardException - Variable is too big. cloneObject public Object cloneObject()(Code) From CloneableObject clone of me as an Object coalesce public DataValueDescriptor coalesce(DataValueDescriptor[] argumentsList, DataValueDescriptor returnValue) throws StandardException(Code) See Also:   DataValueDescriptor.coalesce exception:   StandardException - Thrown on error compare public boolean compare(int op, DataValueDescriptor other, boolean orderedNulls, boolean unknownRV) throws StandardException(Code) dataTypeConversion final protected StandardException dataTypeConversion(String targetType)(Code) Return an conversion exception from this type to another. equals public BooleanDataValue equals(DataValueDescriptor left, DataValueDescriptor right) throws StandardException(Code) The = operator as called from the language module, as opposed to the storage module. This default implementations uses compare(). Parameters:   left - The value on the left side of the = Parameters:   right - The value on the right side of the = A SQL boolean value telling whether the two parameters are equal exception:   StandardException - Thrown on error equals public boolean equals(Object other)(Code) flip protected static int flip(int operator)(Code) Flip the operator used in a comparison (< -> >). This is useful when flipping a comparison due to type precedence. Parameters:   operator - The operator to flip. The flipped operator. genericSetObject void genericSetObject(Object theValue) throws StandardException(Code) getBoolean public boolean getBoolean() throws StandardException(Code) Gets the value in the data value descriptor as a boolean. Throws an exception if the data value is not receivable as a boolean. The data value as a boolean. exception:   StandardException - Thrown on error getByte public byte getByte() throws StandardException(Code) Gets the value in the data value descriptor as a byte. Throws an exception if the data value is not receivable as a byte. The data value as a byte. exception:   StandardException - Thrown on error getBytes public byte[] getBytes() throws StandardException(Code) Gets the value in the data value descriptor as a byte[]. Throws an exception if the data value is not receivable as a Binary or Varbinary. The Binary value as a byte[]. exception:   StandardException - Thrown on error getDate public Date getDate(Calendar cal) throws StandardException(Code) Gets the value in the data value descriptor as a java.sql.Date. Throws an exception if the data value is not receivable as a Date. Parameters:   cal - calendar for object creation The data value as a java.sql.Date. exception:   StandardException - Thrown on error getDouble public double getDouble() throws StandardException(Code) Gets the value in the data value descriptor as a double. Throws an exception if the data value is not receivable as a double. The data value as a double. exception:   StandardException - Thrown on error getFloat public float getFloat() throws StandardException(Code) Gets the value in the data value descriptor as a float. Throws an exception if the data value is not receivable as a float. The data value as a float. exception:   StandardException - Thrown on error getInt public int getInt() throws StandardException(Code) Gets the value in the data value descriptor as a int. Throws an exception if the data value is not receivable as a int. The data value as a int. exception:   StandardException - Thrown on error getLong public long getLong() throws StandardException(Code) Gets the value in the data value descriptor as a long. Throws an exception if the data value is not receivable as a long. The data value as a long. exception:   StandardException - Thrown on error getNationalString protected String getNationalString(LocaleFinder localeFinder) throws StandardException(Code) International version of getString(). Overridden for date, time, and timestamp in SQLDate, SQLTime, SQLTimestamp. exception:   StandardException - Thrown on error getObject public Object getObject() throws StandardException(Code) Gets the value in the data value descriptor as a int. Throws an exception if the data value is not receivable as a int. The data value as a int. exception:   StandardException - Thrown on error getShort public short getShort() throws StandardException(Code) Gets the value in the data value descriptor as a short. Throws an exception if the data value is not receivable as a short. The data value as a short. exception:   StandardException - Thrown on error getStream public InputStream getStream() throws StandardException(Code) Gets the value in the data stream descriptor as an InputStream. Throws an exception if the data value is not receivable as a stream. The data value as an InputStream. exception:   StandardException - Thrown on error getTime public Time getTime(Calendar cal) throws StandardException(Code) Gets the value in the data value descriptor as a java.sql.Time. Throws an exception if the data value is not receivable as a Time. Parameters:   cal - calendar for object creation The data value as a java.sql.Time. exception:   StandardException - Thrown on error getTimestamp public Timestamp getTimestamp(Calendar cal) throws StandardException(Code) Gets the value in the data value descriptor as a java.sql.Timestamp. Throws an exception if the data value is not receivable as a Timestamp. Parameters:   cal - calendar for object creation The data value as a java.sql.Timestamp. exception:   StandardException - Thrown on error getTraceString public String getTraceString() throws StandardException(Code) Gets the value in the data stream descriptor as a trace string. This default implementation simply forwards the call to getString. The data value in a representation suitable for tracing. throws:   StandardException - if getting the data value fails. See Also:   DataValueDescriptor.getString getTypeName String getTypeName(String className)(Code) Get the type name of this value, possibly overriding with the passed in class name (for user/java types). Parameters:   className - greaterOrEquals public BooleanDataValue greaterOrEquals(DataValueDescriptor left, DataValueDescriptor right) throws StandardException(Code) The >= operator as called from the language module, as opposed to the storage module. This default implementation uses compare(). Parameters:   left - The value on the left side of the >= Parameters:   right - The value on the right side of the >= A SQL boolean value telling whether the first operand is greaterthan or equal to the second operand exception:   StandardException - Thrown on error greaterThan public BooleanDataValue greaterThan(DataValueDescriptor left, DataValueDescriptor right) throws StandardException(Code) The > operator as called from the language module, as opposed to the storage module. This default implementations uses compare(). Parameters:   left - The value on the left side of the > Parameters:   right - The value on the right side of the > A SQL boolean value telling whether the first operand is greaterthan the second operand exception:   StandardException - Thrown on error in public BooleanDataValue in(DataValueDescriptor left, DataValueDescriptor[] inList, boolean orderedList) throws StandardException(Code) See Also:   DataValueDescriptor.in exception:   StandardException - Thrown on error invalidFormat final protected StandardException invalidFormat()(Code) Return an out of range exception for this type. isNotNull final public BooleanDataValue isNotNull()(Code) The is not null operator as called from the language module, as opposed to the storage module. A SQL boolean value telling whether the operand is not null isNullOp final public BooleanDataValue isNullOp()(Code) The is null operator as called from the language module, as opposed to the storage module. A SQL boolean value telling whether the operand is null lessOrEquals public BooleanDataValue lessOrEquals(DataValueDescriptor left, DataValueDescriptor right) throws StandardException(Code) The <= operator as called from the language module, as opposed to the storage module. This default implementations uses compare(). Parameters:   left - The value on the left side of the <= Parameters:   right - The value on the right side of the <= A SQL boolean value telling whether the first operand is lessthan or equal to the second operand exception:   StandardException - Thrown on error lessThan public BooleanDataValue lessThan(DataValueDescriptor left, DataValueDescriptor right) throws StandardException(Code) The < operator as called from the language module, as opposed to the storage module. Parameters:   left - The value on the left side of the < Parameters:   right - The value on the right side of the < A SQL boolean value telling whether the first operand is lessthan the second operand exception:   StandardException - Thrown on error normalize public void normalize(DataTypeDescriptor desiredType, DataValueDescriptor source) throws StandardException(Code) Default normalization method. No information needed from DataTypeDescriptor. Parameters:   desiredType - The type to normalize the source column to Parameters:   source - The value to normalize exception:   StandardException - Thrown normalization error. notEquals public BooleanDataValue notEquals(DataValueDescriptor left, DataValueDescriptor right) throws StandardException(Code) The <> operator as called from the language module, as opposed to the storage module. This default implementations uses compare(). Parameters:   left - The value on the left side of the <> Parameters:   right - The value on the right side of the <> A SQL boolean value telling whether the two parametersare not equal exception:   StandardException - Thrown on error outOfRange final protected StandardException outOfRange()(Code) Return an out of range exception for this type. setBigDecimal public void setBigDecimal(Number bigDecimal) throws StandardException(Code) Only to be called when the application sets a value using BigDecimal setFrom protected void setFrom(DataValueDescriptor dvd) throws StandardException(Code) Set the value of this DataValueDescriptor based on the value of the specified DataValueDescriptor. Parameters:   dvd - The DataValueDescriptor that holds the value towhich we want to set this DataValueDescriptor's value. setInto public void setInto(PreparedStatement ps, int position) throws SQLException, StandardException(Code) setInto public void setInto(ResultSet rs, int position) throws SQLException, StandardException(Code) Set this value into a ResultSet for a subsequent ResultSet.insertRow or ResultSet.updateRow. This method will only be called for non-null values. exception:   SQLException - thrown by the ResultSet object exception:   StandardException - thrown by me accessing my value. setObject void setObject(Object theValue) throws StandardException(Code) Set the value from an non-null object. Usually overridden. This implementation throws an exception. The object will have been correctly typed from the call to setObjectForCast. setObjectForCast public void setObjectForCast(Object theValue, boolean instanceOfResultType, String resultTypeClassName) throws StandardException(Code) See Also:   DataValueDescriptor.setObjectForCast exception:   StandardException - thrown on failure setToNull public void setToNull()(Code) See Also:   DataValueDescriptor.setToNull setValue public void setValue(Time theValue) throws StandardException(Code) Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override Parameters:   theValue - The Time value to set this DataValueDescriptor to setValue public void setValue(Time theValue, Calendar cal) throws StandardException(Code) Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override Parameters:   theValue - The Time value to set this DataValueDescriptor to Parameters:   cal - The time zone from the calendar is used to construct the database time value setValue public void setValue(Timestamp theValue) throws StandardException(Code) Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override Parameters:   theValue - The Timestamp value to set this DataValueDescriptor to setValue public void setValue(Timestamp theValue, Calendar cal) throws StandardException(Code) Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override Parameters:   theValue - The Timestamp value to set this DataValueDescriptor to Parameters:   cal - The time zone from the calendar is used to construct the database timestamp value setValue public void setValue(Date theValue) throws StandardException(Code) Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override Parameters:   theValue - The Date value to set this DataValueDescriptor to setValue public void setValue(Date theValue, Calendar cal) throws StandardException(Code) Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override Parameters:   theValue - The Date value to set this DataValueDescriptor to Parameters:   cal - The time zone from the calendar is used to construct the database date value setValue public void setValue(String theValue) throws StandardException(Code) Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override Parameters:   theValue - The BigDecimal value to set this DataValueDescriptor to setValue public void setValue(int theValue) throws StandardException(Code) Set the value of this DataValueDescriptor to the given int value At DataType level just throws an error lower classes will override Parameters:   theValue - The value to set this DataValueDescriptor to exception:   StandardException - Thrown on error setValue public void setValue(double theValue) throws StandardException(Code) Set the value of this DataValueDescriptor to the given double value At DataType level just throws an error lower classes will override Parameters:   theValue - The value to set this DataValueDescriptor to exception:   StandardException - Thrown on error setValue public void setValue(float theValue) throws StandardException(Code) Set the value of this DataValueDescriptor to the given float value At DataType level just throws an error lower classes will override Parameters:   theValue - The value to set this DataValueDescriptor to exception:   StandardException - Thrown on error setValue public void setValue(short theValue) throws StandardException(Code) Set the value of this DataValueDescriptor to the given short value At DataType level just throws an error lower classes will override Parameters:   theValue - The value to set this DataValueDescriptor to exception:   StandardException - Thrown on error setValue public void setValue(long theValue) throws StandardException(Code) Set the value of this DataValueDescriptor to the given long value At DataType level just throws an error lower classes will override Parameters:   theValue - The value to set this DataValueDescriptor to exception:   StandardException - Thrown on error setValue public void setValue(byte theValue) throws StandardException(Code) Set the value of this DataValueDescriptor to the given byte value At DataType level just throws an error lower classes will override Parameters:   theValue - The value to set this DataValueDescriptor to exception:   StandardException - Thrown on error setValue public void setValue(boolean theValue) throws StandardException(Code) Set the value. At DataType level just throws an error lower classes will override Parameters:   theValue - Contains the boolean value to set this to setValue public void setValue(byte[] theValue) throws StandardException(Code) Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override Parameters:   theValue - The byte value to set this DataValueDescriptor to setValue final public void setValue(DataValueDescriptor dvd) throws StandardException(Code) setValue public void setValue(InputStream theStream, int valueLength) throws StandardException(Code) throwLangSetMismatch public void throwLangSetMismatch(Object value) throws StandardException(Code) throwLangSetMismatch void throwLangSetMismatch(String argTypeName) throws StandardException(Code) typePrecedence public int typePrecedence()(Code) Each built-in type in JSQL has a precedence. This precedence determines how to do type promotion when using binary operators. For example, float has a higher precedence than int, so when adding an int to a float, the result type is float. The precedence for some types is arbitrary. For example, it doesn't matter what the precedence of the boolean type is, since it can't be mixed with other types. But the precedence for the number types is critical. The SQL standard requires that exact numeric types be promoted to approximate numeric when one operator uses both. Also, the precedence is arranged so that one will not lose precision when promoting a type. The precedence of this type. typeToBigDecimal public int typeToBigDecimal() throws StandardException(Code) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)