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}