/*
* Copyright 2014 - 2017 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.datediff.minute;
import com.blazebit.persistence.spi.FunctionRenderContext;
import com.blazebit.persistence.spi.TemplateRenderer;
/**
*
* @author Christian Beikov
* @since 1.2.0
*/
public class OracleMinuteDiffFunction extends MinuteDiffFunction {
private final TemplateRenderer bothParamRenderer;
private final TemplateRenderer firstParamRenderer;
private final TemplateRenderer secondParamRenderer;
public OracleMinuteDiffFunction() {
super("(extract(day from cast(?2 as timestamp) - cast(?1 as timestamp)) * " + (24 * 60) + " + extract(hour from cast(?2 as timestamp) - cast(?1 as timestamp)) * 60 + extract(minute from cast(?2 as timestamp) - cast(?1 as timestamp)))");
this.bothParamRenderer = new TemplateRenderer("(select extract(day from t2 - t1) * " + (24 * 60) + " + extract(hour from t2 - t1) * 60 + extract(minute from t2 - t1) from (select cast(?1 as timestamp) as t1, cast(?2 as timestamp) as t2 from dual))");
this.firstParamRenderer = new TemplateRenderer("(select extract(day from cast(?2 as timestamp) - t1) * " + (24 * 60) + " + extract(hour from cast(?2 as timestamp) - t1) * 60 + extract(minute from cast(?2 as timestamp) - t1) from (select cast(?1 as timestamp) as t1 from dual))");
this.secondParamRenderer = new TemplateRenderer("(select extract(day from t2 - cast(?1 as timestamp)) * " + (24 * 60) + " + extract(hour from t2 - cast(?1 as timestamp)) * 60 + extract(minute from t2 - cast(?1 as timestamp)) from (select cast(?2 as timestamp) as t2 from dual))");
}
@Override
protected void renderDiff(FunctionRenderContext context) {
boolean firstContains = context.getArgument(0).contains("?");
boolean secondContains = context.getArgument(1).contains("?");
if (firstContains && context.getArgument(0).length() != 1
|| secondContains && context.getArgument(1).length() != 1) {
throw new IllegalArgumentException("Only simple parameters or expressions are allowed because of a needed reordering in SQL which is otherwise not possible! Expressions ['" + context.getArgument(0) + "', '" + context.getArgument(1) + "'] do not comply!");
}
if (firstContains) {
if (secondContains) {
bothParamRenderer.start(context).addArgument(0).addArgument(1).build();
} else {
firstParamRenderer.start(context).addArgument(0).addArgument(1).build();
}
} else if (secondContains) {
secondParamRenderer.start(context).addArgument(0).addArgument(1).build();
} else {
// Reuse the expression multiple times
renderer.start(context).addArgument(0).addArgument(1).build();
}
}
}