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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.
*/
import org.apache.drill.exec.expr.annotations.Workspace;
<@pp.dropOutputFile />
<#list numericTypes.numeric as type>
<@pp.changeOutputFile name="/org/apache/drill/exec/expr/fn/impl/G${type}ToChar.java" />
<#include "/@includes/license.ftl" />
package org.apache.drill.exec.expr.fn.impl;
<#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.Workspace;
import org.apache.drill.exec.expr.annotations.Param;
import org.apache.drill.exec.expr.holders.*;
import org.apache.drill.exec.record.RecordBatch;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.DrillBuf;
import java.text.NumberFormat;
import java.text.DecimalFormat;
/*
* This class is generated using freemarker and the ${.template_name} template.
*/
@SuppressWarnings("unused")
@FunctionTemplate(name = "to_char", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public class G${type}ToChar implements DrillSimpleFunc {
@Param ${type}Holder left;
@Param VarCharHolder right;
@Inject DrillBuf buffer;
@Workspace java.text.NumberFormat outputFormat;
@Output VarCharHolder out;
public void setup() {
buffer = buffer.reallocIfNeeded(100);
byte[] buf = new byte[right.end - right.start];
right.buffer.getBytes(right.start, buf, 0, right.end - right.start);
String inputFormat = new String(buf);
outputFormat = new java.text.DecimalFormat(inputFormat);
}
public void eval() {
<#if type == "VarDecimal">
java.math.BigDecimal bigDecimal = org.apache.drill.exec.util.DecimalUtility.getBigDecimalFromDrillBuf(left.buffer, left.start, left.end - left.start, left.scale);
String str = outputFormat.format(bigDecimal);
<#elseif type == "Decimal9" || type == "Decimal18">
java.math.BigDecimal bigDecimal = new java.math.BigDecimal(java.math.BigInteger.valueOf(left.value), left.scale);
String str = outputFormat.format(bigDecimal);
<#elseif type == "Decimal28Sparse" || type == "Decimal38Sparse">
java.math.BigDecimal bigDecimal = org.apache.drill.exec.util.DecimalUtility.getBigDecimalFromDrillBuf(left.buffer, left.start, left.nDecimalDigits, left.scale, true);
String str = outputFormat.format(bigDecimal);
<#elseif type == "Decimal28Dense" || type == "Decimal38Dense">
java.math.BigDecimal bigDecimal = org.apache.drill.exec.util.DecimalUtility.getBigDecimalFromDense(left.buffer, left.start, left.nDecimalDigits, left.scale, left.maxPrecision, left.WIDTH);
String str = outputFormat.format(bigDecimal);
<#else>
String str = outputFormat.format(left.value);
</#if>
out.buffer = buffer;
out.start = 0;
out.end = Math.min(100, str.length()); // truncate if target type has length smaller than that of input's string
out.buffer.setBytes(0, str.substring(0,out.end).getBytes());
}
}
</#list>
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