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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.
*/
package org.apache.drill.exec.expr.fn.impl.conv;
import java.io.ByteArrayOutputStream;
import java.io.StringReader;
import javax.inject.Inject;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.DrillBuf;
import org.apache.drill.exec.expr.DrillSimpleFunc;
import org.apache.drill.exec.expr.annotations.FunctionTemplate;
import org.apache.drill.exec.expr.annotations.Output;
import org.apache.drill.exec.expr.annotations.Param;
import org.apache.drill.exec.expr.annotations.Workspace;
import org.apache.drill.exec.expr.annotations.FunctionTemplate.FunctionScope;
import org.apache.drill.exec.expr.annotations.FunctionTemplate.NullHandling;
import org.apache.drill.exec.expr.holders.VarBinaryHolder;
import org.apache.drill.exec.expr.holders.VarCharHolder;
import org.apache.drill.exec.record.RecordBatch;
import org.apache.drill.exec.vector.complex.fn.JsonWriter;
import org.apache.drill.exec.vector.complex.reader.FieldReader;
import org.apache.drill.exec.vector.complex.writer.BaseWriter.ComplexWriter;
import com.google.common.base.Charsets;
public class JsonConvertFrom {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(JsonConvertFrom.class);
private JsonConvertFrom(){}
@FunctionTemplate(name = "convert_fromJSON", scope = FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL, isRandom = true)
public static class ConvertFromJson implements DrillSimpleFunc{
@Param VarBinaryHolder in;
@Inject DrillBuf buffer;
@Output ComplexWriter writer;
public void setup(RecordBatch incoming){
}
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);
try {
org.apache.drill.exec.vector.complex.fn.JsonReader jsonReader = new org.apache.drill.exec.vector.complex.fn.JsonReader(buffer, false);
jsonReader.write(new java.io.StringReader(input), writer);
} catch (Exception e) {
// System.out.println("Error while converting from JSON. ");
// e.printStackTrace();
throw new org.apache.drill.common.exceptions.DrillRuntimeException("Error while converting from JSON. ", e);
}
}
}
@FunctionTemplate(name = "convert_fromJSON", scope = FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL, isRandom = true)
public static class ConvertFromJsonVarchar implements DrillSimpleFunc{
@Param VarCharHolder in;
@Output ComplexWriter writer;
@Inject DrillBuf buffer;
public void setup(RecordBatch incoming){
}
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);
try {
org.apache.drill.exec.vector.complex.fn.JsonReader jsonReader = new org.apache.drill.exec.vector.complex.fn.JsonReader(buffer, false);
jsonReader.write(new java.io.StringReader(input), writer);
} catch (Exception e) {
// System.out.println("Error while converting from JSON. ");
// e.printStackTrace();
throw new org.apache.drill.common.exceptions.DrillRuntimeException("Error while converting from JSON. ", e);
}
}
}
}
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