/
JdbcDataType.java
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/
JdbcDataType.java
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/*
* Copyright 2019 Google LLC
*
* Licensed 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 com.google.cloud.spanner.jdbc;
import com.google.cloud.spanner.ResultSet;
import com.google.cloud.spanner.Struct;
import com.google.cloud.spanner.Type;
import com.google.cloud.spanner.Type.Code;
import java.math.BigDecimal;
import java.sql.Date;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/** Enum for mapping Cloud Spanner data types to Java classes and JDBC SQL {@link Types}. */
enum JdbcDataType {
BOOL {
@Override
public int getSqlType() {
return Types.BOOLEAN;
}
@Override
public Class<Boolean> getJavaClass() {
return Boolean.class;
}
@Override
public Code getCode() {
return Code.BOOL;
}
@Override
public List<Boolean> getArrayElements(ResultSet rs, int columnIndex) {
return rs.getBooleanList(columnIndex);
}
@Override
public Type getSpannerType() {
return Type.bool();
}
},
BYTES {
@Override
public int getSqlType() {
return Types.BINARY;
}
@Override
public Class<byte[]> getJavaClass() {
return byte[].class;
}
@Override
public Code getCode() {
return Code.BYTES;
}
@Override
public List<byte[]> getArrayElements(ResultSet rs, int columnIndex) {
return JdbcTypeConverter.toJavaByteArrays(rs.getBytesList(columnIndex));
}
@Override
public Type getSpannerType() {
return Type.bytes();
}
},
DATE {
@Override
public int getSqlType() {
return Types.DATE;
}
@Override
public Class<Date> getJavaClass() {
return Date.class;
}
@Override
public Code getCode() {
return Code.DATE;
}
@Override
public List<Date> getArrayElements(ResultSet rs, int columnIndex) {
return JdbcTypeConverter.toSqlDates(rs.getDateList(columnIndex));
}
@Override
public Type getSpannerType() {
return Type.date();
}
},
FLOAT64 {
private Set<Class<?>> classes = new HashSet<Class<?>>(Arrays.asList(Float.class, Double.class));
@Override
public int getSqlType() {
return Types.DOUBLE;
}
@Override
public Class<Double> getJavaClass() {
return Double.class;
}
@Override
public Set<Class<?>> getSupportedJavaClasses() {
return classes;
}
@Override
public Code getCode() {
return Code.FLOAT64;
}
@Override
public List<Double> getArrayElements(ResultSet rs, int columnIndex) {
return rs.getDoubleList(columnIndex);
}
@Override
public Type getSpannerType() {
return Type.float64();
}
},
INT64 {
private Set<Class<?>> classes =
new HashSet<Class<?>>(Arrays.asList(Byte.class, Integer.class, Long.class));
@Override
public int getSqlType() {
return Types.BIGINT;
}
@Override
public Class<Long> getJavaClass() {
return Long.class;
}
@Override
public Set<Class<?>> getSupportedJavaClasses() {
return classes;
}
@Override
public Code getCode() {
return Code.INT64;
}
@Override
public List<Long> getArrayElements(ResultSet rs, int columnIndex) {
return rs.getLongList(columnIndex);
}
@Override
public Type getSpannerType() {
return Type.int64();
}
},
NUMERIC {
@Override
public int getSqlType() {
return Types.NUMERIC;
}
@Override
public Class<BigDecimal> getJavaClass() {
return BigDecimal.class;
}
@Override
public Code getCode() {
return Code.NUMERIC;
}
@Override
public List<BigDecimal> getArrayElements(ResultSet rs, int columnIndex) {
return rs.getBigDecimalList(columnIndex);
}
@Override
public Type getSpannerType() {
return Type.numeric();
}
},
STRING {
@Override
public int getSqlType() {
return Types.NVARCHAR;
}
@Override
public Class<String> getJavaClass() {
return String.class;
}
@Override
public Code getCode() {
return Code.STRING;
}
@Override
public List<String> getArrayElements(ResultSet rs, int columnIndex) {
return rs.getStringList(columnIndex);
}
@Override
public Type getSpannerType() {
return Type.string();
}
},
TIMESTAMP {
@Override
public int getSqlType() {
return Types.TIMESTAMP;
}
@Override
public Class<Timestamp> getJavaClass() {
return Timestamp.class;
}
@Override
public Code getCode() {
return Code.TIMESTAMP;
}
@Override
public List<Timestamp> getArrayElements(ResultSet rs, int columnIndex) {
return JdbcTypeConverter.toSqlTimestamps(rs.getTimestampList(columnIndex));
}
@Override
public Type getSpannerType() {
return Type.timestamp();
}
},
STRUCT {
@Override
public int getSqlType() {
return Types.STRUCT;
}
@Override
public Class<Struct> getJavaClass() {
return Struct.class;
}
@Override
public Code getCode() {
return Code.STRUCT;
}
@Override
public List<Struct> getArrayElements(ResultSet rs, int columnIndex) {
return rs.getStructList(columnIndex);
}
@Override
public Type getSpannerType() {
return Type.struct();
}
};
public abstract int getSqlType();
public abstract Code getCode();
public abstract Type getSpannerType();
/**
* @param rs the result set to look up the elements
* @param columnIndex zero based column index
* @return The corresponding array elements of the type in the given result set
*/
public abstract List<?> getArrayElements(ResultSet rs, int columnIndex);
public String getTypeName() {
return name();
}
public abstract Class<?> getJavaClass();
public Set<? extends Class<?>> getSupportedJavaClasses() {
return Collections.singleton(getJavaClass());
}
public static JdbcDataType getType(Class<?> clazz) {
for (JdbcDataType type : JdbcDataType.values()) {
if (type.getSupportedJavaClasses().contains(clazz)) return type;
}
return null;
}
public static JdbcDataType getType(Code code) {
for (JdbcDataType type : JdbcDataType.values()) {
if (type.getCode() == code) return type;
}
return null;
}
}