/**
* 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.
*/
package org.apache.metamodel.schema;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.InetAddress;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Comparator;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import org.apache.metamodel.util.NumberComparator;
import org.apache.metamodel.util.ObjectComparator;
import org.apache.metamodel.util.TimeComparator;
import org.apache.metamodel.util.ToStringComparator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Default implementation of ColumnType
*/
public class ColumnTypeImpl implements ColumnType {
private static final long serialVersionUID = 1L;
public static final Logger logger = LoggerFactory.getLogger(ColumnTypeImpl.class);
private final String _name;
private final SuperColumnType _superColumnType;
private final Class<?> _javaType;
private final boolean _largeObject;
public ColumnTypeImpl(String name, SuperColumnType superColumnType) {
this(name, superColumnType, null);
}
public ColumnTypeImpl(String name, SuperColumnType superColumnType, Class<?> javaType) {
this(name, superColumnType, javaType, false);
}
public ColumnTypeImpl(String name, SuperColumnType superColumnType, Class<?> javaType, boolean largeObject) {
if (name == null) {
throw new IllegalArgumentException("Name cannot be null");
}
if (superColumnType == null) {
throw new IllegalArgumentException("SuperColumnType cannot be null");
}
_name = name;
_superColumnType = superColumnType;
if (javaType == null) {
_javaType = superColumnType.getJavaEquivalentClass();
} else {
_javaType = javaType;
}
_largeObject = largeObject;
}
@Override
public String getName() {
return _name;
}
@Override
public Comparator<Object> getComparator() {
if (isTimeBased()) {
return TimeComparator.getComparator();
}
if (isNumber()) {
return NumberComparator.getComparator();
}
if (isLiteral()) {
return ToStringComparator.getComparator();
}
return ObjectComparator.getComparator();
}
@Override
public boolean isBoolean() {
return _superColumnType == SuperColumnType.BOOLEAN_TYPE;
}
@Override
public boolean isBinary() {
return _superColumnType == SuperColumnType.BINARY_TYPE;
}
@Override
public boolean isNumber() {
return _superColumnType == SuperColumnType.NUMBER_TYPE;
}
@Override
public boolean isTimeBased() {
return _superColumnType == SuperColumnType.TIME_TYPE;
}
@Override
public boolean isLiteral() {
return _superColumnType == SuperColumnType.LITERAL_TYPE;
}
@Override
public boolean isLargeObject() {
return _largeObject;
}
@Override
public Class<?> getJavaEquivalentClass() {
return _javaType;
}
@Override
public SuperColumnType getSuperType() {
return _superColumnType;
}
@Override
public int getJdbcType() throws IllegalStateException {
final String name = this.toString();
try {
// We assume that the JdbcTypes class only consists of constant
// integer types, so we make no assertions here
final Field[] fields = JdbcTypes.class.getFields();
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
String fieldName = field.getName();
if (fieldName.equals(name)) {
int value = (Integer) field.getInt(null);
return value;
}
}
throw new IllegalStateException("No JdbcType found with field name: " + name);
} catch (Exception e) {
throw new IllegalStateException("Could not access fields in JdbcTypes", e);
}
}
@Override
public String toString() {
return _name;
}
/**
* Finds the ColumnType enum corresponding to the incoming JDBC
* type-constant
*/
public static ColumnType convertColumnType(int jdbcType) {
try {
Field[] fields = JdbcTypes.class.getFields();
// We assume that the JdbcTypes class only consists of constant
// integer types, so we make no assertions here
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
int value = (Integer) field.getInt(null);
if (value == jdbcType) {
String fieldName = field.getName();
return valueOf(fieldName);
}
}
} catch (Exception e) {
throw new IllegalStateException("Could not access fields in JdbcTypes", e);
}
return OTHER;
}
/**
* Finds the ColumnType enum corresponding to the incoming Java class.
*
* @param cls
* @return
*/
public static ColumnType convertColumnType(Class<?> cls) {
if (cls == null) {
throw new IllegalArgumentException("Class cannot be null");
}
final ColumnType type;
if (cls == String.class) {
type = ColumnType.STRING;
} else if (cls == Boolean.class || cls == boolean.class) {
type = ColumnType.BOOLEAN;
} else if (cls == Character.class || cls == char.class || cls == Character[].class || cls == char[].class) {
type = ColumnType.CHAR;
} else if (cls == Byte.class || cls == byte.class) {
type = ColumnType.TINYINT;
} else if (cls == Short.class || cls == short.class) {
type = ColumnType.SMALLINT;
} else if (cls == Integer.class || cls == int.class) {
type = ColumnType.INTEGER;
} else if (cls == Long.class || cls == long.class || cls == BigInteger.class) {
type = ColumnType.BIGINT;
} else if (cls == Float.class || cls == float.class) {
type = ColumnType.FLOAT;
} else if (cls == Double.class || cls == double.class) {
type = ColumnType.DOUBLE;
} else if (cls == BigDecimal.class) {
type = ColumnType.DECIMAL;
} else if (Number.class.isAssignableFrom(cls)) {
type = ColumnType.NUMBER;
} else if (Map.class.isAssignableFrom(cls)) {
type = ColumnType.MAP;
} else if (List.class.isAssignableFrom(cls)) {
type = ColumnType.LIST;
} else if (Set.class.isAssignableFrom(cls)) {
type = ColumnType.SET;
} else if (cls == java.sql.Date.class) {
type = ColumnType.DATE;
} else if (cls == Timestamp.class) {
type = ColumnType.TIMESTAMP;
} else if (cls == Time.class) {
type = ColumnType.TIME;
} else if (Date.class.isAssignableFrom(cls)) {
type = ColumnType.TIMESTAMP;
} else if (cls == UUID.class) {
type = ColumnType.UUID;
} else if (cls == InetAddress.class) {
type = ColumnType.INET;
} else {
type = ColumnType.OTHER;
}
return type;
}
public static ColumnType valueOf(String fieldName) {
try {
Field columnTypeField = ColumnType.class.getField(fieldName);
if (columnTypeField != null) {
columnTypeField.setAccessible(true);
Object columnType = columnTypeField.get(ColumnType.class);
return (ColumnType) columnType;
}
} catch (Exception e) {
logger.error("Failed to resolve JDBC type in ColumnType constants: " + fieldName, e);
}
return null;
}
}