com.blazebit.persistence.impl.function.stringjsonagg.MySQLStringJsonAggFunction Maven / Gradle / Ivy
/*
* Copyright 2014 - 2020 Blazebit.
*
* 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.blazebit.persistence.impl.function.stringjsonagg;
import com.blazebit.persistence.spi.FunctionRenderContext;
/**
* @author Christian Beikov
* @since 1.5.0
*/
public class MySQLStringJsonAggFunction extends AbstractStringJsonAggFunction {
@Override
public void render(FunctionRenderContext context) {
if ((context.getArgumentsSize() & 1) == 1) {
throw new RuntimeException("The string_json_agg function needs an even amount of arguments , , ..., , ! args=" + context);
}
context.addChunk("json_arrayagg(json_object(");
context.addArgument(0);
for (int i = 1; i < context.getArgumentsSize(); i++) {
context.addChunk(",");
if ((i & 1) == 1) {
context.addChunk("cast(");
context.addArgument(i);
context.addChunk(" as char)");
} else {
context.addArgument(i);
}
}
context.addChunk("))");
}
}