| /* |
| * Copyright (c) 2010, Stanislav Muhametsin. All Rights Reserved. |
| * |
| * 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 org.apache.zest.index.sql.support.postgresql; |
| |
| import java.lang.reflect.ParameterizedType; |
| import java.lang.reflect.Type; |
| import java.sql.PreparedStatement; |
| import java.sql.SQLException; |
| import java.sql.Timestamp; |
| import java.util.Date; |
| import org.apache.zest.api.common.Optional; |
| import org.apache.zest.api.injection.scope.This; |
| import org.apache.zest.api.mixin.Mixins; |
| import org.apache.zest.index.sql.support.skeletons.SQLDBState; |
| |
| /** |
| * A little helper interface to convert java types to SQL types when inserting objects to prepared statements. It will |
| * first preprocess the object and possibly convert it to something else (like Character to Integer). Then it will use |
| * the {@link SQLDBState#javaTypes2SQLTypes()} mapping to determine which SQL datatype to use when inserting the |
| * object to prepared statement. |
| */ |
| @Mixins( PostgreSQLTypeHelper.SQLTypeHelperMixin.class ) |
| public interface PostgreSQLTypeHelper |
| { |
| |
| /** |
| * Adds the specified object at specified index in specified prepared statement. |
| * |
| * @param ps The prepared statement. |
| * @param index The index for the object to be inserted in prepared statemtent ({@code > 0}). |
| * @param primitive The object to insert. |
| * @param primitiveType The type of object. |
| * @throws SQLException If something underlying throws it. |
| */ |
| void addPrimitiveToPS( PreparedStatement ps, Integer index, @Optional Object primitive, Type primitiveType ) |
| throws SQLException; |
| |
| Integer getSQLType( Object primitive ); |
| |
| public class SQLTypeHelperMixin |
| implements PostgreSQLTypeHelper |
| { |
| |
| @This |
| private SQLDBState _state; |
| |
| public Object processJavaPrimitiveBeforeUsingInStatement( Object primitive ) |
| { |
| if( primitive != null ) |
| { |
| if( primitive instanceof Character ) |
| { |
| primitive = Character.codePointAt( new char[] |
| { |
| (Character) primitive |
| }, 0 ); |
| } |
| else if( primitive instanceof Date ) |
| { |
| primitive = new Timestamp( ( (Date) primitive ).getTime() ); |
| } |
| else if( primitive instanceof Byte ) |
| { |
| primitive = (short) (Byte) primitive; |
| } |
| else if( primitive instanceof Short ) |
| { |
| primitive = (int) (Short) primitive; |
| } |
| } |
| return primitive; |
| } |
| |
| @Override |
| public void addPrimitiveToPS( PreparedStatement ps, Integer index, Object primitive, Type primitiveType ) |
| throws SQLException |
| { |
| primitive = processJavaPrimitiveBeforeUsingInStatement( primitive ); |
| Integer sqlType = this.getSQLType( primitiveType ); |
| ps.setObject( index, primitive, sqlType ); |
| } |
| |
| @Override |
| public Integer getSQLType( Object primitive ) |
| { |
| primitive = processJavaPrimitiveBeforeUsingInStatement( primitive ); |
| |
| return this.getSQLType( primitive.getClass() ); |
| } |
| |
| private Integer getSQLType( Type primitiveType ) |
| { |
| if( primitiveType instanceof ParameterizedType ) |
| { |
| primitiveType = ( (ParameterizedType) primitiveType ).getRawType(); |
| } |
| |
| Class<?> primitiveClass = (Class<?>) primitiveType; |
| |
| if( Enum.class.isAssignableFrom( primitiveClass ) ) |
| { |
| primitiveClass = Enum.class; |
| } |
| Integer sqlType = this._state.javaTypes2SQLTypes().get().get( primitiveClass ); |
| if( sqlType == null ) |
| { |
| throw new InternalError( "Could not find mapping from " + primitiveClass + " to SQL type." ); |
| } |
| |
| return sqlType; |
| } |
| } |
| |
| } |