001/*
002 * Copyright 2002-2013 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.jdbc.core.namedparam;
018
019/**
020 * A simple empty implementation of the {@link SqlParameterSource} interface.
021 *
022 * @author Juergen Hoeller
023 * @since 3.2.2
024 */
025public class EmptySqlParameterSource implements SqlParameterSource {
026
027        /**
028         * A shared instance of {@link EmptySqlParameterSource}.
029         */
030        public static final EmptySqlParameterSource INSTANCE = new EmptySqlParameterSource();
031
032
033        @Override
034        public boolean hasValue(String paramName) {
035                return false;
036        }
037
038        @Override
039        public Object getValue(String paramName) throws IllegalArgumentException {
040                throw new IllegalArgumentException("This SqlParameterSource is empty");
041        }
042
043        @Override
044        public int getSqlType(String paramName) {
045                return TYPE_UNKNOWN;
046        }
047
048        @Override
049        public String getTypeName(String paramName) {
050                return null;
051        }
052
053}