com.blazebit.persistence.impl.function.rowvalue.RowValueSubqueryComparisonFunction 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.rowvalue;
import com.blazebit.persistence.spi.FunctionRenderContext;
import com.blazebit.persistence.spi.JpqlFunction;
/**
* @author Christian Beikov
* @since 1.4.1
*/
public class RowValueSubqueryComparisonFunction implements JpqlFunction {
public static final String FUNCTION_NAME = "compare_row_value_subquery";
@Override
public boolean hasArguments() {
return true;
}
@Override
public boolean hasParenthesesIfNoArguments() {
return true;
}
@Override
public Class getReturnType(Class firstArgumentType) {
return int.class;
}
@Override
public void render(FunctionRenderContext context) {
String operator = context.getArgument(0);
// need to unquote operator
operator = operator.substring(1, operator.length() - 1);
context.addChunk("(");
context.addArgument(1);
for (int argIdx = 2; argIdx < context.getArgumentsSize() - 1; argIdx++) {
context.addChunk(", ");
context.addArgument(argIdx);
}
context.addChunk(") " + operator + " (");
context.addArgument(context.getArgumentsSize() - 1);
context.addChunk(") and 0");
}
}