| /* |
| * 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. |
| */ |
| package org.apache.drill.exec.expr.fn.impl; |
| |
| import io.netty.buffer.DrillBuf; |
| |
| import javax.inject.Inject; |
| |
| 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.BigIntHolder; |
| import org.apache.drill.exec.expr.holders.BitHolder; |
| import org.apache.drill.exec.expr.holders.VarCharHolder; |
| |
| |
| public class SimpleCastFunctions { |
| |
| @FunctionTemplate(names = {"castBIT", "castBOOLEAN"}, scope = FunctionTemplate.FunctionScope.SIMPLE, nulls=NullHandling.NULL_IF_NULL) |
| public static class CastVarCharBoolean implements DrillSimpleFunc { |
| |
| @Param VarCharHolder in; |
| @Output BitHolder out; |
| |
| public void setup() { |
| |
| } |
| |
| public void eval() { |
| byte[] buf = new byte[in.end - in.start]; |
| in.buffer.getBytes(in.start, buf, 0, in.end - in.start); |
| String input = new String(buf, com.google.common.base.Charsets.UTF_8); |
| out.value = org.apache.drill.common.types.BooleanType.get(input).getNumericValue(); |
| } |
| } |
| |
| @FunctionTemplate(name = "castVARCHAR", |
| scope = FunctionTemplate.FunctionScope.SIMPLE, |
| returnType = FunctionTemplate.ReturnType.STRING_CAST, |
| nulls = NullHandling.NULL_IF_NULL, |
| outputWidthCalculatorType = FunctionTemplate.OutputWidthCalculatorType.CUSTOM_CLONE_DEFAULT) |
| public static class CastBooleanVarChar implements DrillSimpleFunc { |
| |
| @Param BitHolder in; |
| @Param BigIntHolder len; |
| @Output VarCharHolder out; |
| @Inject DrillBuf buffer; |
| |
| public void setup() {} |
| |
| public void eval() { |
| byte[] outB = org.apache.drill.common.types.BooleanType.get(String.valueOf(in.value)).name().toLowerCase().getBytes(java.nio.charset.StandardCharsets.UTF_8); |
| buffer.setBytes(0, outB); |
| out.buffer = buffer; |
| out.start = 0; |
| out.end = Math.min((int)len.value, outB.length); // truncate if target type has length smaller than that of input's string |
| } |
| } |
| } |