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JdbcMapper
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JdbcMapper/querymapper/src/main/java/com/moparisthebest/jdbc/TypeMappingsFactory.java

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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* $Header:$
*/
package com.moparisthebest.jdbc;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.Types;
import java.util.HashMap;
import java.util.Map;
/**
* Currently contains all types of type mappings. Implemented using singleton pattern.
*/
public final class TypeMappingsFactory {
/* @todo: refactor! */
private static TypeMappingsFactory _instance;
private static Class<?> XMLBEANS_STRING_ENUM_ABSTRACT_BASE = null;
static {
try {
XMLBEANS_STRING_ENUM_ABSTRACT_BASE = Class.forName("org.apache.xmlbeans.StringEnumAbstractBase");
} catch (ClassNotFoundException e) {
// not an error, just means XmlBeans is not available
}
}
/**
* Get an instance of this class.
* @return TypeMappingsFactory instance.
*/
public static TypeMappingsFactory getInstance() {
if (_instance == null) {
_instance = new TypeMappingsFactory();
}
return _instance;
}
public static final int TYPE_UNKNOWN = 0;
static final int TYPE_BYTE = 1;
static final int TYPE_SHORT = 2;
static final int TYPE_INT = 3;
static final int TYPE_LONG = 4;
static final int TYPE_FLOAT = 5;
static final int TYPE_DOUBLE = 6;
static final int TYPE_BOOLEAN = 7;
static final int TYPE_BYTE_OBJ = 8;
static final int TYPE_SHORT_OBJ = 9;
static final int TYPE_INT_OBJ = 10;
static final int TYPE_LONG_OBJ = 11;
static final int TYPE_FLOAT_OBJ = 12;
static final int TYPE_DOUBLE_OBJ = 13;
static final int TYPE_BOOLEAN_OBJ = 14;
static final int TYPE_BIG_DECIMAL = 15;
static final int TYPE_STRING = 16;
static final int TYPE_BYTES = 17;
static final int TYPE_SQLDATE = 18;
static final int TYPE_TIME = 19;
static final int TYPE_TIMESTAMP = 20;
static final int TYPE_STREAM = 21;
static final int TYPE_READER = 22;
static final int TYPE_CLOB = 23;
static final int TYPE_BLOB = 24;
static final int TYPE_ARRAY = 25;
static final int TYPE_REF = 26;
static final int TYPE_DATE = 27;
static final int TYPE_CALENDAR = 28;
static final int TYPE_STRUCT = 29;
static final int TYPE_XMLBEAN_ENUM = 30;
static final int TYPE_MAX = 31;
private Map<Class, Object> _primitiveDefaults;
//
// keys in this map are the class of the method's return type,
// values are the set of constants defined above all prefixed with
// TYPE_
//
private Map<Class, Integer> _typeMap;
private Map<Class, Integer> _typeSqlMap;
/**
* Map a string version of sql type to sql type (java.sql.Types).
* example: "INTEGER" maps to java.sql.Types.INTEGER
*/
private Map<String, Integer> _typeSqlNameMap;
private static Method _methodMapGet;
/**
* Constructor
*/
TypeMappingsFactory() {
_primitiveDefaults = new HashMap<Class, Object>();
_primitiveDefaults.put(Boolean.TYPE, Boolean.FALSE);
_primitiveDefaults.put(Integer.TYPE, new Integer(0));
_primitiveDefaults.put(Long.TYPE, new Long(0));
_primitiveDefaults.put(Byte.TYPE, new Byte((byte) 0));
_primitiveDefaults.put(Short.TYPE, new Short((short) 0));
_primitiveDefaults.put(Character.TYPE, new Character('\u0000'));
_primitiveDefaults.put(Float.TYPE, new Float(0.0f));
_primitiveDefaults.put(Double.TYPE, new Double(0.0d));
// Class to internal enum
_typeMap = new HashMap<Class, Integer>(TYPE_MAX * 2);
_typeMap.put(Boolean.TYPE, new Integer(TYPE_BOOLEAN));
_typeMap.put(Integer.TYPE, new Integer(TYPE_INT));
_typeMap.put(Long.TYPE, new Integer(TYPE_LONG));
_typeMap.put(Byte.TYPE, new Integer(TYPE_BYTE));
_typeMap.put(Short.TYPE, new Integer(TYPE_SHORT));
_typeMap.put(Float.TYPE, new Integer(TYPE_FLOAT));
_typeMap.put(Double.TYPE, new Integer(TYPE_DOUBLE));
_typeMap.put(Boolean.class, new Integer(TYPE_BOOLEAN_OBJ));
_typeMap.put(Integer.class, new Integer(TYPE_INT_OBJ));
_typeMap.put(Long.class, new Integer(TYPE_LONG_OBJ));
_typeMap.put(Byte.class, new Integer(TYPE_BYTE_OBJ));
_typeMap.put(Short.class, new Integer(TYPE_SHORT_OBJ));
_typeMap.put(Float.class, new Integer(TYPE_FLOAT_OBJ));
_typeMap.put(Double.class, new Integer(TYPE_DOUBLE_OBJ));
_typeMap.put(String.class, new Integer(TYPE_STRING));
_typeMap.put(java.math.BigDecimal.class, new Integer(TYPE_BIG_DECIMAL));
_typeMap.put(byte[].class, new Integer(TYPE_BYTES));
_typeMap.put(java.sql.Timestamp.class, new Integer(TYPE_TIMESTAMP));
_typeMap.put(java.sql.Time.class, new Integer(TYPE_TIME));
_typeMap.put(java.sql.Date.class, new Integer(TYPE_SQLDATE));
_typeMap.put(java.sql.Ref.class, new Integer(TYPE_REF));
_typeMap.put(Blob.class, new Integer(TYPE_BLOB));
_typeMap.put(Clob.class, new Integer(TYPE_CLOB));
_typeMap.put(java.sql.Array.class, new Integer(TYPE_ARRAY));
_typeMap.put(java.sql.Struct.class, new Integer(TYPE_STRUCT));
_typeMap.put(java.io.Reader.class, new Integer(TYPE_READER));
_typeMap.put(java.io.InputStream.class, new Integer(TYPE_STREAM));
_typeMap.put(java.util.Date.class, new Integer(TYPE_DATE));
_typeMap.put(java.util.Calendar.class, new Integer(TYPE_CALENDAR));
_typeMap.put(java.util.GregorianCalendar.class, new Integer(TYPE_CALENDAR));
if (XMLBEANS_STRING_ENUM_ABSTRACT_BASE != null) {
_typeMap.put(XMLBEANS_STRING_ENUM_ABSTRACT_BASE, new Integer(TYPE_XMLBEAN_ENUM));
}
// Class to java.sql.Types
_typeSqlMap = new HashMap<Class, Integer>(TYPE_MAX * 2);
_typeSqlMap.put(Boolean.TYPE, new Integer(Types.BOOLEAN));
_typeSqlMap.put(Integer.TYPE, new Integer(Types.INTEGER));
_typeSqlMap.put(Long.TYPE, new Integer(Types.BIGINT));
_typeSqlMap.put(Byte.TYPE, new Integer(Types.TINYINT));
_typeSqlMap.put(Short.TYPE, new Integer(Types.SMALLINT));
_typeSqlMap.put(Float.TYPE, new Integer(Types.REAL));
_typeSqlMap.put(Double.TYPE, new Integer(Types.DOUBLE));
_typeSqlMap.put(Boolean.class, new Integer(Types.BOOLEAN));
_typeSqlMap.put(Integer.class, new Integer(Types.INTEGER));
_typeSqlMap.put(Long.class, new Integer(Types.BIGINT));
_typeSqlMap.put(Byte.class, new Integer(Types.TINYINT));
_typeSqlMap.put(Short.class, new Integer(Types.SMALLINT));
_typeSqlMap.put(Float.class, new Integer(Types.REAL));
_typeSqlMap.put(Double.class, new Integer(Types.DOUBLE));
_typeSqlMap.put(String.class, new Integer(Types.VARCHAR));
_typeSqlMap.put(java.math.BigDecimal.class, new Integer(Types.DECIMAL));
_typeSqlMap.put(byte[].class, new Integer(Types.VARBINARY));
_typeSqlMap.put(java.sql.Timestamp.class, new Integer(Types.TIMESTAMP));
_typeSqlMap.put(java.sql.Time.class, new Integer(Types.TIME));
_typeSqlMap.put(java.sql.Date.class, new Integer(Types.DATE));
_typeSqlMap.put(java.sql.Ref.class, new Integer(Types.REF));
_typeSqlMap.put(Blob.class, new Integer(Types.BLOB));
_typeSqlMap.put(Clob.class, new Integer(Types.CLOB));
_typeSqlMap.put(java.sql.Array.class, new Integer(Types.ARRAY));
_typeSqlMap.put(java.sql.Struct.class, new Integer(Types.STRUCT));
_typeSqlMap.put(java.util.Date.class, new Integer(Types.TIMESTAMP));
_typeSqlMap.put(java.util.Calendar.class, new Integer(Types.TIMESTAMP));
_typeSqlMap.put(java.util.GregorianCalendar.class, new Integer(Types.TIMESTAMP));
if (XMLBEANS_STRING_ENUM_ABSTRACT_BASE != null) {
_typeSqlMap.put(XMLBEANS_STRING_ENUM_ABSTRACT_BASE, new Integer(Types.VARCHAR));
}
// String to java.sql.Types
_typeSqlNameMap = new HashMap<String, Integer>(TYPE_MAX * 2);
_typeSqlNameMap.put("BIT", new Integer(Types.BIT));
_typeSqlNameMap.put("TINYINT", new Integer(Types.TINYINT));
_typeSqlNameMap.put("SMALLINT", new Integer(Types.SMALLINT));
_typeSqlNameMap.put("INTEGER", new Integer(Types.INTEGER));
_typeSqlNameMap.put("BIGINT", new Integer(Types.BIGINT));
_typeSqlNameMap.put("FLOAT", new Integer(Types.REAL));
_typeSqlNameMap.put("REAL", new Integer(Types.REAL));
_typeSqlNameMap.put("DOUBLE", new Integer(Types.DOUBLE));
_typeSqlNameMap.put("NUMERIC", new Integer(Types.NUMERIC));
_typeSqlNameMap.put("DECIMAL", new Integer(Types.DECIMAL));
_typeSqlNameMap.put("CHAR", new Integer(Types.CHAR));
_typeSqlNameMap.put("VARCHAR", new Integer(Types.VARCHAR));
_typeSqlNameMap.put("LONGVARCHAR", new Integer(Types.LONGVARCHAR));
_typeSqlNameMap.put("DATE", new Integer(Types.DATE));
_typeSqlNameMap.put("TIME", new Integer(Types.TIME));
_typeSqlNameMap.put("TIMESTAMP", new Integer(Types.TIMESTAMP));
_typeSqlNameMap.put("BINARY", new Integer(Types.BINARY));
_typeSqlNameMap.put("VARBINARY", new Integer(Types.VARBINARY));
_typeSqlNameMap.put("LONGVARBINARY", new Integer(Types.LONGVARBINARY));
_typeSqlNameMap.put("NULL", new Integer(Types.NULL));
_typeSqlNameMap.put("OTHER", new Integer(Types.OTHER));
_typeSqlNameMap.put("JAVA_OBJECT", new Integer(Types.JAVA_OBJECT));
_typeSqlNameMap.put("DISTINCT", new Integer(Types.DISTINCT));
_typeSqlNameMap.put("STRUCT", new Integer(Types.STRUCT));
_typeSqlNameMap.put("ARRAY", new Integer(Types.ARRAY));
_typeSqlNameMap.put("BLOB", new Integer(Types.BLOB));
_typeSqlNameMap.put("CLOB", new Integer(Types.CLOB));
_typeSqlNameMap.put("REF", new Integer(Types.REF));
_typeSqlNameMap.put("DATALINK", new Integer(Types.DATALINK));
_typeSqlNameMap.put("BOOLEAN", new Integer(Types.BOOLEAN));
// some JAVA synonyms
_typeSqlNameMap.put("BYTE", new Integer(Types.TINYINT));
_typeSqlNameMap.put("SHORT", new Integer(Types.SMALLINT));
_typeSqlNameMap.put("INT", new Integer(Types.INTEGER));
_typeSqlNameMap.put("LONG", new Integer(Types.BIGINT));
// cache the Map.get method for efficiency
try {
_methodMapGet = Map.class.getMethod("get", new Class[]{Object.class});
} catch (NoSuchMethodException e) {
throw new MapperException("Can not find java.util.Map.get(Object) method");
}
}
/**
* Convert a type string to its SQL Type int value.
* @param type A String containing the SQL type name.
* @return The SQL type, TYPE_UNKNOWN if cannot convert.
*/
public int convertStringToSQLType(String type) {
if (_typeSqlNameMap.containsKey(type.toUpperCase())) {
return _typeSqlNameMap.get(type.toUpperCase());
}
return TYPE_UNKNOWN;
}
/**
* Get the SQL type of a class, start at top level class an check all super classes until match is found.
* @param classType Class to get SQL type of.
* @return Types.OTHER if cannot find SQL type.
*/
public int getSqlType(Class classType) {
final Class origType = classType;
while (classType != null) {
Integer type = _typeSqlMap.get(classType);
if (type != null) {
return type.intValue();
}
classType = classType.getSuperclass();
}
//
// special check for blobs/clobs they are interfaces not derived from
//
if (Blob.class.isAssignableFrom(origType)) {
return _typeSqlMap.get(Blob.class).intValue();
} else if (Clob.class.isAssignableFrom(origType)) {
return _typeSqlMap.get(Clob.class).intValue();
}
return Types.OTHER;
}
/**
* Get the SQL type for an object.
* @param o Object to get SQL type of.
* @return SQL type of the object, Types.OTHER if cannot classify.
*/
public int getSqlType(Object o) {
if (null == o) {
return Types.NULL;
}
return getSqlType(o.getClass());
}
/**
*
* @param val
* @param args
* @return the type
* @throws IllegalAccessException
* @throws java.lang.reflect.InvocationTargetException
*/
public Object lookupType(Object val, Object[] args)
throws IllegalAccessException, InvocationTargetException
{
return _methodMapGet.invoke(val, args);
}
/**
* Get the type id (defined by this class) for the given class.
* @param classType Class to get type of.
* @return Type id of class.
*/
public int getTypeId(Class classType) {
if(classType == null)
return TYPE_UNKNOWN;
final Class origType = classType;
while (null != classType) {
Integer typeObj = (Integer) _typeMap.get(classType);
if (null != typeObj) {
return typeObj.intValue();
}
classType = classType.getSuperclass();
}
//
// special check for blobs/clobs they are interfaces not derived from
//
if (Blob.class.isAssignableFrom(origType)) {
return _typeMap.get(Blob.class).intValue();
} else if (Clob.class.isAssignableFrom(origType)) {
return _typeMap.get(Clob.class).intValue();
}
return TYPE_UNKNOWN;
}
/**
* Returns a primitive legal value as opposed to null if type is primitive.
* @param type type to get null value for.
* @return null value for specifed type.
*/
public Object fixNull(Class type) {
return type.isPrimitive() ? _primitiveDefaults.get(type) : null;
}
/**
* Create an Object array for the given array.
*
* @param o An array.
* @return A new object array.
*/
public static Object[] toObjectArray(Object o) {
Class clas = o.getClass().getComponentType();
if (null == clas) return null;
Object[] arr;
if (clas == Boolean.TYPE) {
boolean[] src = (boolean[]) o;
arr = new Object[src.length];
for (int i = 0; i < src.length; i++)
arr[i] = new Boolean(src[i]);
} else if (clas == Character.TYPE) {
char[] src = (char[]) o;
arr = new Object[src.length];
for (int i = 0; i < src.length; i++)
arr[i] = new Character(src[i]);
} else if (clas == Byte.TYPE) {
byte[] src = (byte[]) o;
arr = new Object[src.length];
for (int i = 0; i < src.length; i++)
arr[i] = new Byte(src[i]);
} else if (clas == Short.TYPE) {
short[] src = (short[]) o;
arr = new Object[src.length];
for (int i = 0; i < src.length; i++)
arr[i] = new Short(src[i]);
} else if (clas == Integer.TYPE) {
int[] src = (int[]) o;
arr = new Object[src.length];
for (int i = 0; i < src.length; i++)
arr[i] = new Integer(src[i]);
} else if (clas == Long.TYPE) {
long[] src = (long[]) o;
arr = new Object[src.length];
for (int i = 0; i < src.length; i++)
arr[i] = new Long(src[i]);
} else if (clas == Float.TYPE) {
float[] src = (float[]) o;
arr = new Object[src.length];
for (int i = 0; i < src.length; i++)
arr[i] = new Float(src[i]);
} else if (clas == Double.TYPE) {
double[] src = (double[]) o;
arr = new Object[src.length];
for (int i = 0; i < src.length; i++)
arr[i] = new Double(src[i]);
} else {
arr = (Object[]) o;
}
return arr;
}
}
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