HSQLDB example source code file (Column.java)
The HSQLDB Column.java source code
/*
* For work developed by the HSQL Development Group:
*
* Copyright (c) 2001-2010, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
*
* For work originally developed by the Hypersonic SQL Group:
*
* Copyright (c) 1995-2000, The Hypersonic SQL Group.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the Hypersonic SQL Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE HYPERSONIC SQL GROUP,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* on behalf of the Hypersonic SQL Group.
*/
package org.hsqldb;
import java.io.IOException;
import java.io.Serializable;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;
import org.hsqldb.HsqlNameManager.HsqlName;
import org.hsqldb.lib.StringConverter;
import org.hsqldb.store.ValuePool;
import org.hsqldb.types.Binary;
import org.hsqldb.types.JavaObject;
import org.hsqldb.lib.java.JavaSystem;
// fredt@users 20020130 - patch 491987 by jimbag@users
// fredt@users 20020320 - doc 1.7.0 - update
// fredt@users 20020401 - patch 442993 by fredt - arithmetic expressions
// to allow mixed type arithmetic expressions beginning with a narrower type
// changes applied to several lines of code and not marked separately
// consists of changes to arithmatic functions to allow promotion of
// java.lang.Number values and new functions to choose type for promotion
// fredt@users 20020401 - patch 455757 by galena@users (Michiel de Roo)
// interpretation of TINYINT as Byte instead of Short
// fredt@users 20020130 - patch 491987 by jimbag@users
// support for sql standard char and varchar. size is maintained as
// defined in the DDL and trimming and padding takes place accordingly
// modified by fredt - trimming and padding are turned off by default but
// can be applied accross the database by defining sql.enforce_size=true in
// database.properties file
// fredt@users 20020215 - patch 1.7.0 by fredt - quoted identifiers
// applied to different parts to support the sql standard for
// naming of columns and tables (use of quoted identifiers as names)
// fredt@users 20020328 - patch 1.7.0 by fredt - change REAL to Double
// fredt@users 20020402 - patch 1.7.0 by fredt - type conversions
// frequently used type conversions are done without creating temporary
// Strings to reduce execution time and garbage collection
// fredt@users 20021013 - patch 1.7.1 by fredt - type conversions
// scripting of Double.Nan and infinity values
// fredt@users 20030715 - patch 1.7.2 - type narrowing for numeric values
// fredt@users - patch 1.8.0 - enforcement of precision and scale
/**
* Implementation of SQL table columns as defined in DDL statements with
* static methods to process their values.<p>
*
* Enhanced type checking and conversion by fredt@users
*
* @author Thomas Mueller (Hypersonic SQL Group)
* @author fredt@users
* @version 1.8.0
* @since Hypersonic SQL
*/
public class Column {
// --------------------------------------------------
// DDL name, size, scale, null, identity and default values
// most variables are final but not declared so because of a bug in
// JDK 1.1.8 compiler
public HsqlName columnName;
private int colType;
private int colSize;
private int colScale;
private boolean isNullable;
private boolean isIdentity;
private boolean isPrimaryKey;
private Expression defaultExpression;
long identityStart;
long identityIncrement;
static final BigInteger MAX_LONG = BigInteger.valueOf(Long.MAX_VALUE);
static final BigInteger MIN_LONG = BigInteger.valueOf(Long.MIN_VALUE);
static final BigInteger MAX_INT = BigInteger.valueOf(Integer.MAX_VALUE);
static final BigInteger MIN_INT = BigInteger.valueOf(Integer.MIN_VALUE);
static final BigDecimal BIG_DECIMAL_0 = new BigDecimal(0.0);
static final BigDecimal BIG_DECIMAL_1 = new BigDecimal(1.0);
/**
* Creates a column defined in DDL statement.
*
* @param name
* @param nullable
* @param type
* @param size
* @param scale
* @param identity
* @param startvalue
* @param increment
* @param primarykey
* @param defstring
*/
Column(HsqlName name, boolean nullable, int type, int size, int scale,
boolean primarykey,
Expression defexpression) throws HsqlException {
columnName = name;
isNullable = nullable;
colType = type;
colSize = size;
colScale = scale;
isPrimaryKey = primarykey;
defaultExpression = defexpression;
}
void setIdentity(boolean identity, long startvalue,
long increment) throws HsqlException {
isIdentity = identity;
identityStart = startvalue;
identityIncrement = increment;
if (isIdentity) {
if (colType == Types.INTEGER) {
if (identityStart > Integer.MAX_VALUE
|| identityIncrement > Integer.MAX_VALUE) {
throw Trace.error(Trace.NUMERIC_VALUE_OUT_OF_RANGE,
columnName.statementName);
}
}
}
}
private Column() {}
/**
* Used for primary key changes.
*/
Column duplicate(boolean withIdentity) throws HsqlException {
Column newCol = new Column();
newCol.columnName = columnName;
newCol.isNullable = isNullable;
newCol.colType = colType;
newCol.colSize = colSize;
newCol.colScale = colScale;
newCol.defaultExpression = defaultExpression;
if (withIdentity) {
newCol.setIdentity(isIdentity, identityStart, identityIncrement);
}
return newCol;
}
void setType(Column other) {
isNullable = other.isNullable;
colType = other.colType;
colSize = other.colSize;
colScale = other.colScale;
}
/**
* Is this the identity column in the table.
*
* @return boolean
*/
boolean isIdentity() {
return isIdentity;
}
/**
* Is column nullable.
*
* @return boolean
*/
boolean isNullable() {
return isNullable;
}
/**
* Set nullable.
*
*/
void setNullable(boolean value) {
isNullable = value;
}
/**
* Is this single column primary key of the table.
*
* @return boolean
*/
public boolean isPrimaryKey() {
return isPrimaryKey;
}
/**
* Set primary key.
*
*/
void setPrimaryKey(boolean value) {
isPrimaryKey = value;
}
/**
* Returns default value in the session context.
*/
Object getDefaultValue(Session session) throws HsqlException {
return defaultExpression == null ? null
: defaultExpression.getValue(session,
colType);
}
/**
* Returns DDL for default value.
*/
String getDefaultDDL() {
String ddl = null;
try {
ddl = defaultExpression == null ? null
: defaultExpression.getDDL();
} catch (HsqlException e) {}
return ddl;
}
/**
* Returns default expression for the column.
*/
Expression getDefaultExpression() {
return defaultExpression;
}
void setDefaultExpression(Expression expr) {
defaultExpression = expr;
}
/**
* Type of the column.
*
* @return java.sql.Types int value for the column
*/
int getType() {
return colType;
}
int getDIType() {
return colType == Types.VARCHAR_IGNORECASE ? Types.VARCHAR
: colType;
}
int getDITypeSub() {
if (colType == Types.VARCHAR_IGNORECASE) {
return Types.TYPE_SUB_IGNORECASE;
}
return Types.TYPE_SUB_DEFAULT;
}
/**
* Size of the column in DDL (0 if not defined).
*
* @return DDL size of column
*/
int getSize() {
return colSize;
}
/**
* Scale of the column in DDL (0 if not defined).
*
* @return DDL scale of column
*/
int getScale() {
return colScale;
}
/**
* Add two object of a given type
*
* @param a
* @param b
* @param type
* @return result
* @throws HsqlException
*/
static Object add(Object a, Object b, int type) throws HsqlException {
if (a == null || b == null) {
return null;
}
switch (type) {
case Types.NULL :
return null;
case Types.REAL :
case Types.FLOAT :
case Types.DOUBLE : {
double ad = ((Number) a).doubleValue();
double bd = ((Number) b).doubleValue();
return ValuePool.getDouble(Double.doubleToLongBits(ad + bd));
// return new Double(ad + bd);
}
case Types.VARCHAR :
case Types.CHAR :
case Types.LONGVARCHAR :
case Types.VARCHAR_IGNORECASE :
return (String) a + (String) b;
case Types.NUMERIC :
case Types.DECIMAL : {
BigDecimal abd = (BigDecimal) a;
BigDecimal bbd = (BigDecimal) b;
return abd.add(bbd);
}
case Types.TINYINT :
case Types.SMALLINT :
case Types.INTEGER : {
int ai = ((Number) a).intValue();
int bi = ((Number) b).intValue();
return ValuePool.getInt(ai + bi);
}
case Types.BIGINT : {
long longa = ((Number) a).longValue();
long longb = ((Number) b).longValue();
return ValuePool.getLong(longa + longb);
}
default :
throw Trace.error(Trace.FUNCTION_NOT_SUPPORTED,
Types.getTypeString(type));
}
}
/**
* Concat two objects by turning them into strings first.
*
* @param a
* @param b
* @return result
* @throws HsqlException
*/
static Object concat(Object a, Object b) throws HsqlException {
if (a == null || b == null) {
return null;
}
return a.toString() + b.toString();
}
/**
* Negate a numeric object.
*
* @param a
* @param type
* @return result
* @throws HsqlException
*/
static Object negate(Object a, int type) throws HsqlException {
if (a == null) {
return null;
}
switch (type) {
case Types.NULL :
return null;
case Types.REAL :
case Types.FLOAT :
case Types.DOUBLE : {
double ad = -((Number) a).doubleValue();
return ValuePool.getDouble(Double.doubleToLongBits(ad));
}
case Types.NUMERIC :
case Types.DECIMAL :
return ((BigDecimal) a).negate();
case Types.TINYINT :
case Types.SMALLINT :
case Types.INTEGER :
return ValuePool.getInt(-((Number) a).intValue());
case Types.BIGINT :
return ValuePool.getLong(-((Number) a).longValue());
default :
throw Trace.error(Trace.FUNCTION_NOT_SUPPORTED,
Types.getTypeString(type));
}
}
/**
* Multiply two numeric objects.
*
* @param a
* @param b
* @param type
* @return result
* @throws HsqlException
*/
static Object multiply(Object a, Object b, int type) throws HsqlException {
if (a == null || b == null) {
return null;
}
// fredt@users - type conversion - may need to apply to other arithmetic operations too
if (!(a instanceof Number && b instanceof Number)) {
a = Column.convertObject(a, type);
b = Column.convertObject(b, type);
}
switch (type) {
case Types.NULL :
return null;
case Types.REAL :
case Types.FLOAT :
case Types.DOUBLE : {
double ad = ((Number) a).doubleValue();
double bd = ((Number) b).doubleValue();
return ValuePool.getDouble(Double.doubleToLongBits(ad * bd));
}
case Types.NUMERIC :
case Types.DECIMAL : {
BigDecimal abd = (BigDecimal) a;
BigDecimal bbd = (BigDecimal) b;
return abd.multiply(bbd);
}
case Types.TINYINT :
case Types.SMALLINT :
case Types.INTEGER : {
int ai = ((Number) a).intValue();
int bi = ((Number) b).intValue();
return ValuePool.getInt(ai * bi);
}
case Types.BIGINT : {
long longa = ((Number) a).longValue();
long longb = ((Number) b).longValue();
return ValuePool.getLong(longa * longb);
}
default :
throw Trace.error(Trace.FUNCTION_NOT_SUPPORTED,
Types.getTypeString(type));
}
}
/**
* Divide numeric object a by object b.
*
* @param a
* @param b
* @param type
* @return result
* @throws HsqlException
*/
static Object divide(Object a, Object b, int type) throws HsqlException {
if (a == null || b == null) {
return null;
}
switch (type) {
case Types.NULL :
return null;
case Types.REAL :
case Types.FLOAT :
case Types.DOUBLE : {
double ad = ((Number) a).doubleValue();
double bd = ((Number) b).doubleValue();
return ValuePool.getDouble(Double.doubleToLongBits(ad / bd));
}
case Types.NUMERIC :
case Types.DECIMAL : {
BigDecimal abd = (BigDecimal) a;
BigDecimal bbd = (BigDecimal) b;
int scale = abd.scale() > bbd.scale() ? abd.scale()
: bbd.scale();
return (bbd.signum() == 0) ? null
: abd.divide(bbd, scale,
BigDecimal.ROUND_DOWN);
}
case Types.TINYINT :
case Types.SMALLINT :
case Types.INTEGER : {
int ai = ((Number) a).intValue();
int bi = ((Number) b).intValue();
if (bi == 0) {
throw Trace.error(Trace.DIVISION_BY_ZERO);
}
return ValuePool.getInt(ai / bi);
}
case Types.BIGINT : {
long longa = ((Number) a).longValue();
long longb = ((Number) b).longValue();
return (longb == 0) ? null
: ValuePool.getLong(longa / longb);
}
default :
throw Trace.error(Trace.FUNCTION_NOT_SUPPORTED,
Types.getTypeString(type));
}
}
/**
* Subtract numeric object b from object a.
*
* @param a
* @param b
* @param type
* @return result
* @throws HsqlException
*/
static Object subtract(Object a, Object b, int type) throws HsqlException {
if (a == null || b == null) {
return null;
}
switch (type) {
case Types.NULL :
return null;
case Types.REAL :
case Types.FLOAT :
case Types.DOUBLE : {
double ad = ((Number) a).doubleValue();
double bd = ((Number) b).doubleValue();
return ValuePool.getDouble(Double.doubleToLongBits(ad - bd));
}
case Types.NUMERIC :
case Types.DECIMAL : {
BigDecimal abd = (BigDecimal) a;
BigDecimal bbd = (BigDecimal) b;
return abd.subtract(bbd);
}
case Types.TINYINT :
case Types.SMALLINT :
case Types.INTEGER : {
int ai = ((Number) a).intValue();
int bi = ((Number) b).intValue();
return ValuePool.getInt(ai - bi);
}
case Types.BIGINT : {
long longa = ((Number) a).longValue();
long longb = ((Number) b).longValue();
return ValuePool.getLong(longa - longb);
}
default :
throw Trace.error(Trace.FUNCTION_NOT_SUPPORTED,
Types.getTypeString(type));
}
}
// boucherb@users 2003-09-25
// TODO: Maybe use //#ifdef tag or reflective static method attribute
// instantiation to take advantage of String.compareToIgnoreCase when
// available (JDK 1.2 and greater) during ANT build. That or perhaps
// consider using either local character-wise comparison or first converting
// to lower case and then to upper case. Sun states that the JDK 1.2 introduced
// String.compareToIngnorCase() comparison involves calling
// Character.toLowerCase(Character.toUpperCase()) on compared characters,
// to correctly handle some caveats concering using only the one operation or
// the other outside the ascii character range.
// fredt@users 20020130 - patch 418022 by deforest@users
// use of rtrim() to mimic SQL92 behaviour
/**
* Compare a with b and return int value as result.
*
* @param a instance of Java wrapper, depending on type, but always same for a & b (can be null)
* @param b instance of Java wrapper, depending on type, but always same for a & b (can be null)
* @param type one of the java.sql.Types
* @return result 1 if a>b, 0 if a=b, -1 if b>a
* @throws HsqlException
*/
static int compare(Collation collation, Object a, Object b, int type) {
int i = 0;
if (a == b) {
return 0;
}
// Current null handling here: null==null and smaller any value
// Note, standard SQL null handling is handled by Expression.test() calling testNull() instead of this!
// Attention, this is also used for grouping ('null' is one group)
if (a == null) {
return -1;
}
if (b == null) {
return 1;
}
switch (type) {
case Types.NULL :
return 0;
case Types.VARCHAR :
case Types.LONGVARCHAR :
return collation.compare((String) a, (String) b);
case Types.CHAR :
return collation.compare(Library.rtrim((String) a),
Library.rtrim((String) b));
case Types.VARCHAR_IGNORECASE :
return collation.compareIgnoreCase(((String) a), ((String) b));
case Types.TINYINT :
case Types.SMALLINT :
case Types.INTEGER : {
int ai = ((Number) a).intValue();
int bi = ((Number) b).intValue();
return (ai > bi) ? 1
: (bi > ai ? -1
: 0);
}
case Types.BIGINT : {
long longa = ((Number) a).longValue();
long longb = ((Number) b).longValue();
return (longa > longb) ? 1
: (longb > longa ? -1
: 0);
}
case Types.REAL :
case Types.FLOAT :
case Types.DOUBLE : {
double ad = ((Number) a).doubleValue();
double bd = ((Number) b).doubleValue();
return (ad > bd) ? 1
: (bd > ad ? -1
: 0);
}
case Types.NUMERIC :
case Types.DECIMAL :
i = ((BigDecimal) a).compareTo((BigDecimal) b);
break;
case Types.DATE :
return HsqlDateTime.compare((Date) a, (Date) b);
case Types.TIME :
return HsqlDateTime.compare((Time) a, (Time) b);
case Types.TIMESTAMP :
return HsqlDateTime.compare((Timestamp) a, (Timestamp) b);
case Types.BOOLEAN : {
boolean boola = ((Boolean) a).booleanValue();
boolean boolb = ((Boolean) b).booleanValue();
return (boola == boolb) ? 0
: (boolb ? -1
: 1);
}
case Types.BINARY :
case Types.VARBINARY :
case Types.LONGVARBINARY :
if (a instanceof Binary && b instanceof Binary) {
i = compareTo(((Binary) a).getBytes(),
((Binary) b).getBytes());
}
break;
case Types.OTHER :
return 0;
}
return (i == 0) ? 0
: (i < 0 ? -1
: 1);
}
/**
* Convert an object into a Java object that represents its SQL type.<p>
* All internal type conversion operations start with
* this method. If a direct conversion doesn't take place, the object
* is converted into a string first and an attempt is made to convert
* the string into the target type.<br>
*
* One objective of this mehod is to ensure the Object can be converted
* to the given SQL type. For example, a very large BIGINT
* value cannot be narrowed down to an INTEGER or SMALLINT.<br>
*
* Type conversion performed by this method has gradually evolved in 1.7.2
* to allow narrowing of numeric types in all cases according to the SQL
* standard.<br>
*
* Another new objective is to normalize DATETIME values.<br>
*
* Objects set via JDBC PreparedStatement use this method to convert
* the data to the Java type that is required for custom serialization
* by the engine. <br>
*
* @param o
* @param type
* @return result
* @throws HsqlException
*/
public static Object convertObject(Object o,
int type) throws HsqlException {
try {
if (o == null) {
return null;
}
switch (type) {
case Types.NULL :
return null;
case Types.TINYINT :
if (o instanceof java.lang.String) {
o = Library.trim((String) o, " ", true, true);
int val = Integer.parseInt((String) o);
o = ValuePool.getInt(val);
}
if (o instanceof java.lang.Integer) {
int temp = ((Number) o).intValue();
if (Byte.MAX_VALUE < temp || temp < Byte.MIN_VALUE) {
throw Trace.error(
Trace.NUMERIC_VALUE_OUT_OF_RANGE);
}
return o;
}
if (o instanceof java.lang.Long) {
long temp = ((Number) o).longValue();
if (Byte.MAX_VALUE < temp || temp < Byte.MIN_VALUE) {
throw Trace.error(
Trace.NUMERIC_VALUE_OUT_OF_RANGE);
}
return ValuePool.getInt(((Number) o).intValue());
}
// fredt@users - direct conversion to optimise JDBC setObject(Byte)
if (o instanceof java.lang.Byte) {
return ValuePool.getInt(((Number) o).intValue());
}
// fredt@users - returns to this method for range checking
if (o instanceof java.lang.Number) {
return convertObject(convertToInt(o), type);
}
if (o instanceof java.lang.Boolean) {
return ((Boolean) o).booleanValue()
? ValuePool.getInt(1)
: ValuePool.getInt(0);
}
break;
case Types.SMALLINT :
if (o instanceof java.lang.String) {
o = Library.trim((String) o, " ", true, true);
int val = Integer.parseInt((String) o);
o = ValuePool.getInt(val);
}
if (o instanceof java.lang.Integer) {
int temp = ((Number) o).intValue();
if (Short.MAX_VALUE < temp || temp < Short.MIN_VALUE) {
throw Trace.error(
Trace.NUMERIC_VALUE_OUT_OF_RANGE);
}
return o;
}
if (o instanceof java.lang.Long) {
long temp = ((Number) o).longValue();
if (Short.MAX_VALUE < temp || temp < Short.MIN_VALUE) {
throw Trace.error(
Trace.NUMERIC_VALUE_OUT_OF_RANGE);
}
return ValuePool.getInt(((Number) o).intValue());
}
// fredt@users - direct conversion for JDBC setObject(Short), etc.
if (o instanceof Byte || o instanceof Short) {
return ValuePool.getInt(((Number) o).intValue());
}
// fredt@users - returns to this method for range checking
if (o instanceof Number) {
return convertObject(convertToInt(o), type);
}
if (o instanceof java.lang.Boolean) {
return ((Boolean) o).booleanValue()
? ValuePool.getInt(1)
: ValuePool.getInt(0);
}
break;
case Types.INTEGER :
if (o instanceof java.lang.Integer) {
return o;
}
if (o instanceof java.lang.String) {
o = Library.trim((String) o, " ", true, true);
int val = Integer.parseInt((String) o);
return ValuePool.getInt(val);
}
if (o instanceof java.lang.Long) {
long temp = ((Number) o).longValue();
if (Integer.MAX_VALUE < temp
|| temp < Integer.MIN_VALUE) {
throw Trace.error(
Trace.NUMERIC_VALUE_OUT_OF_RANGE);
}
return ValuePool.getInt(((Number) o).intValue());
}
if (o instanceof Byte || o instanceof Short) {
return ValuePool.getInt(((Number) o).intValue());
}
if (o instanceof java.lang.Number) {
return convertToInt(o);
}
if (o instanceof java.lang.Boolean) {
return ((Boolean) o).booleanValue()
? ValuePool.getInt(1)
: ValuePool.getInt(0);
}
break;
case Types.BIGINT :
if (o instanceof java.lang.Long) {
return o;
}
if (o instanceof java.lang.String) {
o = Library.trim((String) o, " ", true, true);
long val = Long.parseLong((String) o);
return ValuePool.getLong(val);
}
if (o instanceof java.lang.Integer) {
return ValuePool.getLong(((Integer) o).longValue());
}
if (o instanceof Byte || o instanceof Short) {
return ValuePool.getLong(((Number) o).intValue());
}
if (o instanceof java.lang.Number) {
return convertToLong(o);
}
if (o instanceof java.lang.Boolean) {
return ((Boolean) o).booleanValue()
? ValuePool.getLong(1)
: ValuePool.getLong(0);
}
break;
case Types.REAL :
case Types.FLOAT :
case Types.DOUBLE :
if (o instanceof java.lang.Double) {
return o;
}
if (o instanceof java.lang.String) {
o = Library.trim((String) o, " ", true, true);
double d = JavaSystem.parseDouble((String) o);
long l = Double.doubleToLongBits(d);
return ValuePool.getDouble(l);
}
if (o instanceof java.lang.Number) {
return convertToDouble(o);
}
if (o instanceof java.lang.Boolean) {
return ((Boolean) o).booleanValue()
? ValuePool.getDouble(1)
: ValuePool.getDouble(0);
}
break;
case Types.NUMERIC :
case Types.DECIMAL :
if (o instanceof BigDecimal) {
return o;
}
if (o instanceof Long) {
return BigDecimal.valueOf(((Long) o).longValue());
}
if (o instanceof java.lang.Boolean) {
return ((Boolean) o).booleanValue() ? BIG_DECIMAL_1
: BIG_DECIMAL_0;
}
break;
case Types.BOOLEAN :
if (o instanceof java.lang.Boolean) {
return (Boolean) o;
}
if (o instanceof java.lang.String) {
o = Library.trim((String) o, " ", true, true);
return ((String) o).equalsIgnoreCase("TRUE")
? Boolean.TRUE
: Boolean.FALSE;
}
if (o instanceof Integer) {
return ((Integer) o).intValue() == 0 ? Boolean.FALSE
: Boolean.TRUE;
}
if (o instanceof Long) {
return ((Long) o).longValue() == 0L ? Boolean.FALSE
: Boolean.TRUE;
}
if (o instanceof java.lang.Double) {
return ((Double) o).doubleValue() == 0.0
? Boolean.FALSE
: Boolean.TRUE;
}
if (o instanceof BigDecimal) {
return ((BigDecimal) o).equals(BIG_DECIMAL_0)
? Boolean.FALSE
: Boolean.TRUE;
}
throw Trace.error(Trace.WRONG_DATA_TYPE);
case Types.VARCHAR_IGNORECASE :
case Types.VARCHAR :
case Types.CHAR :
case Types.LONGVARCHAR :
if (o instanceof java.lang.String) {
return o;
}
if (o instanceof Time) {
return HsqlDateTime.getTimeString((Time) o, null);
}
if (o instanceof Timestamp) {
return HsqlDateTime.getTimestampString((Timestamp) o,
null);
}
if (o instanceof Date) {
return HsqlDateTime.getDateString((Date) o, null);
}
if (o instanceof byte[]) {
return StringConverter.byteToHex((byte[]) o);
}
break;
case Types.TIME :
if (o instanceof Time) {
return HsqlDateTime.getNormalisedTime((Time) o);
}
if (o instanceof Timestamp) {
return HsqlDateTime.getNormalisedTime((Timestamp) o);
}
if (o instanceof String) {
return HsqlDateTime.timeValue((String) o);
}
if (o instanceof Date) {
throw Trace.error(Trace.INVALID_CONVERSION,
Types.getTypeString(type));
}
break;
case Types.TIMESTAMP :
if (o instanceof Timestamp) {
return o;
}
if (o instanceof Time) {
return HsqlDateTime.getNormalisedTimestamp((Time) o);
}
if (o instanceof Date) {
return HsqlDateTime.getNormalisedTimestamp((Date) o);
}
if (o instanceof String) {
return HsqlDateTime.timestampValue((String) o);
}
break;
case Types.DATE :
if (o instanceof Date) {
return HsqlDateTime.getNormalisedDate((Date) o);
}
if (o instanceof Timestamp) {
return HsqlDateTime.getNormalisedDate((Timestamp) o);
}
if (o instanceof String) {
return HsqlDateTime.dateValue((String) o);
}
if (o instanceof Time) {
throw Trace.error(Trace.INVALID_CONVERSION,
Types.getTypeString(type));
}
break;
case Types.BINARY :
case Types.VARBINARY :
case Types.LONGVARBINARY :
if (o instanceof Binary) {
return o;
} else if (o instanceof byte[]) {
return new Binary((byte[]) o, false);
} else if (o instanceof String) {
/**
* @todo fredt - we need this for script processing only
* handle the script separately and process normal
* conversion according to rules in SQL
* standard
*/
return new Binary(
StringConverter.hexToByte((String) o), false);
}
throw Trace.error(Trace.INVALID_CONVERSION,
Types.getTypeString(type));
// fredt@users 20030708 - patch 1.7.2 - OBJECT handling - superseded
case Types.OTHER :
if (o instanceof JavaObject) {
return o;
} else if (o instanceof String) {
/**
* @todo fredt - we need this for script processing only
* handle the script separately and allow normal Sting
* objects to be stored as JavaObject
*/
return new JavaObject(
StringConverter.hexToByte((String) o));
} else if (o instanceof Binary) {
return new JavaObject(((Binary) o).getBytes());
}
return new JavaObject((Serializable) o);
default :
}
if (o instanceof JavaObject) {
o = ((JavaObject) o).getObject();
return convertObject(o, type);
}
return convertString(o.toString(), type);
} catch (HsqlException e) {
throw e;
} catch (Exception e) {
throw Trace.error(Trace.WRONG_DATA_TYPE, e.toString());
}
}
/**
* Return a java object based on a SQL string. This is called from
* convertObject(Object o, int type).
*
* @param s
* @param type
* @return
* @throws HsqlException
*/
private static Object convertString(String s,
int type) throws HsqlException {
switch (type) {
case Types.TINYINT :
case Types.SMALLINT :
// fredt - do maximumm / minimum checks on each type
return convertObject(s, type);
case Types.INTEGER :
int val = Integer.parseInt(s);
return ValuePool.getInt(val);
case Types.BIGINT :
return ValuePool.getLong(Long.parseLong(s));
case Types.REAL :
case Types.FLOAT :
case Types.DOUBLE :
double d = JavaSystem.parseDouble(s);
long l = Double.doubleToLongBits(d);
return ValuePool.getDouble(l);
case Types.VARCHAR_IGNORECASE :
case Types.VARCHAR :
case Types.CHAR :
case Types.LONGVARCHAR :
return s;
case Types.DATE :
return HsqlDateTime.dateValue(s);
case Types.TIME :
return HsqlDateTime.timeValue(s);
case Types.TIMESTAMP :
return HsqlDateTime.timestampValue(s);
case Types.NUMERIC :
case Types.DECIMAL :
s = Library.trim(s, " ", true, true);
return new BigDecimal(s);
case Types.BOOLEAN :
return s.equalsIgnoreCase("TRUE") ? Boolean.TRUE
: Boolean.FALSE;
case Types.BINARY :
case Types.VARBINARY :
case Types.LONGVARBINARY :
case Types.OTHER :
default :
throw Trace.error(Trace.INVALID_CONVERSION,
Types.getTypeString(type));
}
}
/**
* Return an SQL representation of an object. Strings will be quoted
* with single quotes, other objects will represented as in a SQL
* statement.
*
* @param o
* @param type
* @return result
* @throws HsqlException
*/
static String createSQLString(Object o, int type) throws HsqlException {
if (o == null) {
return "NULL";
}
switch (type) {
case Types.NULL :
return "NULL";
case Types.REAL :
case Types.FLOAT :
case Types.DOUBLE :
return createSQLString(((Number) o).doubleValue());
case Types.DATE :
case Types.TIME :
case Types.TIMESTAMP :
return StringConverter.toQuotedString(o.toString(), '\'',
false);
case Types.BINARY :
case Types.VARBINARY :
case Types.LONGVARBINARY :
if (!(o instanceof Binary)) {
throw Trace.error(Trace.INVALID_CONVERSION);
}
return StringConverter.toQuotedString(
StringConverter.byteToHex(((Binary) o).getBytes()), '\'',
false);
case Types.OTHER :
if (!(o instanceof JavaObject)) {
throw Trace.error(Trace.SERIALIZATION_FAILURE);
}
return StringConverter.toQuotedString(
StringConverter.byteToHex(((JavaObject) o).getBytes()),
'\'', false);
case Types.VARCHAR_IGNORECASE :
case Types.VARCHAR :
case Types.CHAR :
case Types.LONGVARCHAR :
return createSQLString((String) o);
default :
return o.toString();
}
}
public static String createSQLString(double x) {
if (x == Double.NEGATIVE_INFINITY) {
return "-1E0/0";
}
if (x == Double.POSITIVE_INFINITY) {
return "1E0/0";
}
if (Double.isNaN(x)) {
return "0E0/0E0";
}
String s = Double.toString(x);
// ensure the engine treats the value as a DOUBLE, not DECIMAL
if (s.indexOf('E') < 0) {
s = s.concat("E0");
}
return s;
}
/**
* Turns a java string into a quoted SQL string
*
* @param s java string
* @return quoted SQL string
*/
public static String createSQLString(String s) {
if (s == null) {
return "NULL";
}
return StringConverter.toQuotedString(s, '\'', true);
}
/**
* Explicit casts are handled here. This is separate from the implicit
* casts carried out when inserting/updating rows.
* SQL standard 6.12 rules for enforcement of size, precision and scale
* are implemented here are as follows:
*
* For no size, precision or scale, default to convertObject(Object)
*
* Right truncation is allowed only for CHAR to CHAR casts
* (CHAR is generic for all string types).
*
* For other casts to CHAR, right truncation is not allowed.
*
* For numeric conversions, scale is always converted to target first,
* then precision is imposed. No truncation is allowed. (fredt)
*/
public static Object convertObject(Session session, Object o, int type,
int precision,
int scale) throws HsqlException {
if (o == null) {
return o;
}
if (precision == 0) {
return convertObject(o, type);
}
boolean check = true;
switch (type) {
case Types.VARCHAR_IGNORECASE :
case Types.LONGVARCHAR :
type = Types.VARCHAR;
case Types.VARCHAR :
case Types.CHAR :
if (o instanceof String) {
check = false;
} else {
o = convertObject(o, Types.VARCHAR);
}
return enforceSize(o, type, precision, scale, check);
case Types.NUMERIC :
case Types.DECIMAL :
if (!(o instanceof BigDecimal)) {
o = convertObject(o, type);
}
return enforceSize(o, type, precision, scale, true);
case Types.TIMESTAMP :
if (o instanceof Time) {
long millis = session.currentDate.getTime()
+ ((Time) o).getTime();
o = HsqlDateTime.getTimestamp(millis);
}
if (o instanceof Timestamp) {
return enforceSize(o, type, precision, scale, false);
}
}
return convertObject(o, type);
}
static int[] tenPower = {
1000000000, 100000000, 10000000, 1000000, 100000, 10000, 1000
};
/**
* Check an object for type CHAR and VARCHAR and truncate/pad based on
* the size
*
* @param obj object to check
* @param type the object type
* @param size size to enforce
* @param check throw if too long
* @return the altered object if the right type, else the object
* passed in unaltered
* @throws HsqlException if data too long
*/
static Object enforceSize(Object obj, int type, int size, int scale,
boolean check) throws HsqlException {
if (obj == null) {
return obj;
}
if (size == 0 && type != Types.TIMESTAMP) {
return obj;
}
// todo: need to handle BINARY like this as well
switch (type) {
case Types.CHAR :
return checkChar((String) obj, size, check);
case Types.VARCHAR :
case Types.VARCHAR_IGNORECASE :
return checkVarchar((String) obj, size, check);
case Types.NUMERIC :
case Types.DECIMAL :
BigDecimal dec = (BigDecimal) obj;
dec = dec.setScale(scale, BigDecimal.ROUND_HALF_DOWN);
BigInteger big = JavaSystem.getUnscaledValue(dec);
int sign = big.signum() == -1 ? 1
: 0;
if (big.toString().length() - sign > size) {
throw Trace.error(Trace.STRING_DATA_TRUNCATION);
}
return dec;
case Types.TIMESTAMP :
if (size == 6) {
return obj;
}
Timestamp ts = (Timestamp) obj;
int nanos = ts.getNanos();
int divisor = tenPower[size];
int newNanos = (nanos / divisor) * divisor;
ts.setNanos(newNanos);
return ts;
default :
return obj;
}
}
/**
* Checks the length of a VARCHAR string.
*
* @param s the string to pad to truncate
* @param len the len to make the string
* @param check if true, throw an exception if truncation takes place
* @return the string of size len
*/
static String checkVarchar(String s, int len,
boolean check) throws HsqlException {
int slen = s.length();
if (slen > len) {
if (check) {
throw Trace.error(Trace.STRING_DATA_TRUNCATION);
}
return s.substring(0, len);
}
return s;
}
/**
* Checks and pads a CHARACTER string to len size
*
* @param s the string to pad to truncate
* @param len the len to make the string
* @param check if true, throw an exception if truncation takes place
* @return the string of size len
*/
static String checkChar(String s, int len,
boolean check) throws HsqlException {
int slen = s.length();
if (slen == len) {
return s;
}
if (slen > len) {
if (check) {
throw Trace.error(Trace.STRING_DATA_TRUNCATION);
}
return s.substring(0, len);
}
char[] b = new char[len];
s.getChars(0, slen, b, 0);
for (int i = slen; i < len; i++) {
b[i] = ' ';
}
return new String(b);
}
/**
* Type narrowing from DOUBLE/DECIMAL/NUMERIC to BIGINT / INT / SMALLINT / TINYINT
* following the SQL rules. When conversion is from a non-integral type,
* digits to the right of the decimal point are lost.
*/
/**
* Converter from a numeric object to Integer. Input is checked to be
* within range represented by Integer.
*/
static Integer convertToInt(Object o) throws HsqlException {
if (o instanceof BigDecimal) {
BigInteger bi = ((BigDecimal) o).toBigInteger();
if (bi.compareTo(MAX_INT) > 0 || bi.compareTo(MIN_INT) < 0) {
throw Trace.error(Trace.NUMERIC_VALUE_OUT_OF_RANGE);
}
return ValuePool.getInt(bi.intValue());
}
if (o instanceof Double || o instanceof Float) {
double d = ((Number) o).doubleValue();
if (Double.isNaN(d) || d >= (double) Integer.MAX_VALUE + 1
|| d <= (double) Integer.MIN_VALUE - 1) {
throw Trace.error(Trace.NUMERIC_VALUE_OUT_OF_RANGE);
}
return ValuePool.getInt((int) d);
}
throw Trace.error(Trace.INVALID_CONVERSION);
}
/**
* Converter from a numeric object to Long. Input is checked to be
* within range represented by Long.
*/
static Long convertToLong(Object o) throws HsqlException {
if (o instanceof BigDecimal) {
BigInteger bi = ((BigDecimal) o).toBigInteger();
if (bi.compareTo(MAX_LONG) > 0 || bi.compareTo(MIN_LONG) < 0) {
throw Trace.error(Trace.NUMERIC_VALUE_OUT_OF_RANGE);
}
return ValuePool.getLong(bi.longValue());
}
if (o instanceof Double || o instanceof Float) {
double d = ((Number) o).doubleValue();
if (Double.isNaN(d) || d >= (double) Long.MAX_VALUE + 1
|| d <= (double) Long.MIN_VALUE - 1) {
throw Trace.error(Trace.NUMERIC_VALUE_OUT_OF_RANGE);
}
return ValuePool.getLong((long) d);
}
throw Trace.error(Trace.INVALID_CONVERSION);
}
/**
* Converter from a numeric object to Double. Input is checked to be
* within range represented by Double
*/
static Double convertToDouble(Object o) throws HsqlException {
double val;
if (o instanceof BigDecimal) {
BigDecimal bd = (BigDecimal) o;
val = bd.doubleValue();
int signum = bd.signum();
BigDecimal bo = new BigDecimal(val + signum);
if (bo.compareTo(bd) != signum) {
throw Trace.error(Trace.NUMERIC_VALUE_OUT_OF_RANGE);
}
} else {
val = ((Number) o).doubleValue();
}
return ValuePool.getDouble(Double.doubleToLongBits(val));
}
// fredt@users 20020408 - patch 442993 by fredt - arithmetic expressions
/**
* Arithmetic expression terms are promoted to a type that can
* represent the resulting values and avoid incorrect results.<p>
* When the result or the expression is converted to the
* type of the target column for storage, an exception is thrown if the
* resulting value cannot be stored in the column<p>
* Returns a SQL type "wide" enough to represent the result of the
* expression.<br>
* A type is "wider" than the other if it can represent all its
* numeric values.<BR>
* Types narrower than INTEGER (int) are promoted to
* INTEGER. The order is as follows<p>
*
* INTEGER, BIGINT, DOUBLE, DECIMAL<p>
*
* TINYINT and SMALLINT in any combination return INTEGER<br>
* INTEGER and INTEGER return BIGINT<br>
* BIGINT and INTEGER return NUMERIC/DECIMAL<br>
* BIGINT and BIGINT return NUMERIC/DECIMAL<br>
* DOUBLE and INTEGER return DOUBLE<br>
* DOUBLE and BIGINT return DOUBLE<br>
* NUMERIC/DECIMAL and any type returns NUMERIC/DECIMAL<br>
*
* @author fredt@users
* @param type1 java.sql.Types value for the first numeric type
* @param type2 java.sql.Types value for the second numeric type
* @return either type1 or type2 on the basis of the above order
*/
static int getCombinedNumberType(int type1, int type2, int expType) {
int typeWidth1 = getNumTypeWidth(type1);
int typeWidth2 = getNumTypeWidth(type2);
if (typeWidth1 == 16 || typeWidth2 == 16) {
return Types.DOUBLE;
}
switch (expType) {
case Expression.EQUAL :
case Expression.BIGGER :
case Expression.BIGGER_EQUAL :
case Expression.SMALLER_EQUAL :
case Expression.SMALLER :
case Expression.NOT_EQUAL :
case Expression.ALTERNATIVE :
case Expression.DIVIDE :
return (typeWidth1 > typeWidth2) ? type1
: type2;
default :
int sum = typeWidth1 + typeWidth2;
if (sum <= 4) {
return Types.INTEGER;
}
if (sum <= 8) {
return Types.BIGINT;
}
return Types.NUMERIC;
}
}
/**
* @param type java.sql.Types int for a numeric type
* @return relative width
*/
static int getNumTypeWidth(int type) {
switch (type) {
case Types.TINYINT :
return 1;
case Types.SMALLINT :
return 2;
case Types.INTEGER :
return 4;
case Types.BIGINT :
return 8;
case Types.REAL :
case Types.FLOAT :
case Types.DOUBLE :
return 16;
case Types.NUMERIC :
case Types.DECIMAL :
return 32;
default :
return 32;
}
}
/**
* returns -1, 0 , +1
*/
static int compareToTypeRange(Object o, int targettype) {
if (!(o instanceof Number)) {
return 0;
}
if (o instanceof Integer || o instanceof Long) {
long temp = ((Number) o).longValue();
int min;
int max;
switch (targettype) {
case Types.TINYINT :
min = Byte.MIN_VALUE;
max = Byte.MAX_VALUE;
break;
case Types.SMALLINT :
min = Short.MIN_VALUE;
max = Short.MAX_VALUE;
break;
case Types.INTEGER :
min = Integer.MIN_VALUE;
max = Integer.MAX_VALUE;
break;
case Types.BIGINT :
case Types.DECIMAL :
case Types.NUMERIC :
default :
return 0;
}
if (max < temp) {
return 1;
}
if (temp < min) {
return -1;
}
return 0;
} else {
try {
o = convertToLong(o);
return compareToTypeRange(o, targettype);
} catch (HsqlException e) {
if (e.getErrorCode() == -Trace.NUMERIC_VALUE_OUT_OF_RANGE) {
if (o instanceof BigDecimal) {
return ((BigDecimal) o).signum();
} else if (o instanceof Double) {
return ((Double) o).doubleValue() > 0 ? 1
: -1;
}
}
}
}
return 0;
}
/**
* Converts the specified hexadecimal digit <CODE>String
* to an equivalent array of bytes.
*
* @param hexString a <CODE>String of hexadecimal digits
* @throws HsqlException if the specified string contains non-hexadecimal digits.
* @return a byte array equivalent to the specified string of hexadecimal digits
*/
public static byte[] hexToByteArray(String hexString)
throws HsqlException {
try {
return StringConverter.hexToByte(hexString);
} catch (IOException e) {
throw Trace.error(Trace.INVALID_CHARACTER_ENCODING);
}
}
/**
* Compares a <CODE>byte[] with another specified
* <CODE>byte[] for order. Returns a negative integer, zero,
* or a positive integer as the first object is less than, equal to, or
* greater than the specified second <CODE>byte[].
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