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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
<@pp.dropOutputFile />
<#list cast.types as type>
<#-- Cast function template for conversion from Float to Decimal9, Decimal18, Decimal28, Decimal38 -->
<#if type.major == "FloatDecimalComplex" || type.major == "DoubleDecimalComplex" || type.major == "FloatDecimalSimple" || type.major == "DoubleDecimalSimple">
<@pp.changeOutputFile name="/org/apache/drill/exec/expr/fn/impl/gcast/Cast${type.from}${type.to}.java" />
<#include "/@includes/license.ftl" />
package org.apache.drill.exec.expr.fn.impl.gcast;
<#include "/@includes/vv_imports.ftl" />
import org.apache.drill.exec.expr.DrillSimpleFunc;
import org.apache.drill.exec.expr.annotations.FunctionTemplate;
import org.apache.drill.exec.expr.annotations.FunctionTemplate.NullHandling;
import org.apache.drill.exec.expr.annotations.Output;
import org.apache.drill.exec.expr.annotations.Param;
import org.apache.drill.exec.expr.holders.*;
import org.apache.drill.exec.record.RecordBatch;
import org.apache.drill.exec.util.DecimalUtility;
import org.apache.drill.exec.expr.annotations.Workspace;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.DrillBuf;
import java.nio.ByteBuffer;
/*
* This class is generated using freemarker and the ${.template_name} template.
*/
@SuppressWarnings("unused")
@FunctionTemplate(name = "cast${type.to?upper_case}",
scope = FunctionTemplate.FunctionScope.SIMPLE,
returnType = FunctionTemplate.ReturnType.DECIMAL_CAST,
nulls = NullHandling.NULL_IF_NULL)
public class Cast${type.from}${type.to} implements DrillSimpleFunc {
@Param ${type.from}Holder in;
<#if type.major == "FloatDecimalComplex" || type.major == "DoubleDecimalComplex">
@Inject DrillBuf buffer;
</#if>
@Param BigIntHolder precision;
@Param BigIntHolder scale;
@Output ${type.to}Holder out;
public void setup() {
<#if type.major == "FloatDecimalComplex" || type.major == "DoubleDecimalComplex">
int size = ${type.arraySize} * (org.apache.drill.exec.util.DecimalUtility.INTEGER_SIZE);
buffer = buffer.reallocIfNeeded(size);
</#if>
}
public void eval() {
out.scale = (int) scale.value;
<#if !type.to.endsWith("VarDecimal")>
out.precision = (int) precision.value;
</#if>
<#if type.to.endsWith("VarDecimal")>
// TODO: the entire set of logic, above, appears to be using BigDecimal constructors completely wrong!!!!
// for the time being, this new logic is added for VarDecimal only.
double d = in.value;
for (int i = 0; i < out.scale; ++i) { // loop to compute unscaled value
d *= 10.0;
}
long lval = (long)(d >= 0.0 ? d + 0.5 : d - 0.5); // round off unscaled integer, from float8 to nearest integer
java.math.BigInteger bi = new java.math.BigInteger(Long.toString(lval));
java.math.BigDecimal bd = new java.math.BigDecimal(bi, out.scale);
int len = org.apache.drill.exec.util.DecimalUtility.getVarDecimalFromBigDecimal(bd, out.buffer, out.start);
out.end = out.start + len;
<#elseif type.major == "FloatDecimalComplex" || type.major == "DoubleDecimalComplex">
out.start = 0;
out.buffer = buffer;
// Assign the integer part of the decimal to the output holder
org.apache.drill.exec.util.DecimalUtility.getSparseFromBigDecimal(new java.math.BigDecimal(String.valueOf(in.value)), out.buffer, out.start, out.scale, out.precision, out.nDecimalDigits);
<#elseif type.to.endsWith("Decimal9")>
out.value = org.apache.drill.exec.util.DecimalUtility.getDecimal9FromBigDecimal(new java.math.BigDecimal(String.valueOf(in.value)), out.scale, out.precision);
<#elseif type.to.endsWith("Decimal18")>
out.value = org.apache.drill.exec.util.DecimalUtility.getDecimal18FromBigDecimal(new java.math.BigDecimal(String.valueOf(in.value)), out.scale, out.precision);
</#if>
}
}
</#if>
</#list>
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