org.springframework.jdbc.core.namedparam.EmptySqlParameterSource.java Source code

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Here is the source code for org.springframework.jdbc.core.namedparam.EmptySqlParameterSource.java

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/*
 * Copyright 2002-2018 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.jdbc.core.namedparam;

import org.springframework.lang.Nullable;

/**
 * A simple empty implementation of the {@link SqlParameterSource} interface.
 *
 * @author Juergen Hoeller
 * @since 3.2.2
 */
public class EmptySqlParameterSource implements SqlParameterSource {

    /**
     * A shared instance of {@link EmptySqlParameterSource}.
     */
    public static final EmptySqlParameterSource INSTANCE = new EmptySqlParameterSource();

    @Override
    public boolean hasValue(String paramName) {
        return false;
    }

    @Override
    @Nullable
    public Object getValue(String paramName) throws IllegalArgumentException {
        throw new IllegalArgumentException("This SqlParameterSource is empty");
    }

    @Override
    public int getSqlType(String paramName) {
        return TYPE_UNKNOWN;
    }

    @Override
    @Nullable
    public String getTypeName(String paramName) {
        return null;
    }

    @Override
    @Nullable
    public String[] getParameterNames() {
        return null;
    }

}