| /* |
| * 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.vector.complex.fn; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| import org.apache.drill.common.types.TypeProtos.DataMode; |
| import org.apache.drill.common.types.TypeProtos.MinorType; |
| import org.apache.drill.exec.vector.complex.reader.FieldReader; |
| |
| import com.fasterxml.jackson.core.JsonFactory; |
| import com.fasterxml.jackson.core.JsonGenerationException; |
| import com.fasterxml.jackson.core.JsonGenerator; |
| |
| public class JsonWriter { |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(JsonWriter.class); |
| |
| private final JsonFactory factory = new JsonFactory(); |
| private final JsonOutput gen; |
| |
| public JsonWriter(OutputStream out, boolean pretty, boolean useExtendedOutput) throws IOException{ |
| JsonGenerator writer = factory.configure(JsonGenerator.Feature.QUOTE_NON_NUMERIC_NUMBERS, false).createJsonGenerator(out); |
| if(pretty){ |
| writer = writer.useDefaultPrettyPrinter(); |
| } |
| if(useExtendedOutput){ |
| gen = new ExtendedJsonOutput(writer); |
| }else{ |
| gen = new BasicJsonOutput(writer); |
| } |
| |
| } |
| |
| public JsonWriter(JsonOutput gen) { |
| this.gen = gen; |
| } |
| |
| public void write(FieldReader reader) throws JsonGenerationException, IOException{ |
| writeValue(reader); |
| gen.flush(); |
| } |
| |
| private void writeValue(FieldReader reader) throws JsonGenerationException, IOException{ |
| final DataMode m = reader.getType().getMode(); |
| final MinorType mt = reader.getType().getMinorType(); |
| |
| switch(m){ |
| case OPTIONAL: |
| case REQUIRED: |
| |
| |
| switch (mt) { |
| case FLOAT4: |
| gen.writeFloat(reader); |
| break; |
| case FLOAT8: |
| gen.writeDouble(reader); |
| break; |
| case INT: |
| gen.writeInt(reader); |
| break; |
| case SMALLINT: |
| gen.writeSmallInt(reader); |
| break; |
| case TINYINT: |
| gen.writeTinyInt(reader); |
| break; |
| case BIGINT: |
| gen.writeBigInt(reader); |
| break; |
| case BIT: |
| gen.writeBoolean(reader); |
| break; |
| |
| case DATE: |
| gen.writeDate(reader); |
| break; |
| case TIME: |
| gen.writeTime(reader); |
| break; |
| case TIMESTAMP: |
| gen.writeTimestamp(reader); |
| break; |
| case INTERVALYEAR: |
| case INTERVALDAY: |
| case INTERVAL: |
| gen.writeInterval(reader); |
| break; |
| case DECIMAL28DENSE: |
| case DECIMAL28SPARSE: |
| case DECIMAL38DENSE: |
| case DECIMAL38SPARSE: |
| case DECIMAL9: |
| case DECIMAL18: |
| case VARDECIMAL: |
| gen.writeDecimal(reader); |
| break; |
| |
| case LIST: |
| // this is a pseudo class, doesn't actually contain the real reader so we have to drop down. |
| gen.writeStartArray(); |
| while (reader.next()) { |
| writeValue(reader.reader()); |
| } |
| gen.writeEndArray(); |
| break; |
| case MAP: |
| gen.writeStartObject(); |
| if (reader.isSet()) { |
| for(String name : reader){ |
| FieldReader childReader = reader.reader(name); |
| if(childReader.isSet()){ |
| gen.writeFieldName(name); |
| writeValue(childReader); |
| } |
| } |
| } |
| gen.writeEndObject(); |
| break; |
| case NULL: |
| case LATE: |
| gen.writeUntypedNull(); |
| break; |
| |
| case VAR16CHAR: |
| gen.writeVar16Char(reader); |
| break; |
| case VARBINARY: |
| gen.writeBinary(reader); |
| break; |
| case VARCHAR: |
| gen.writeVarChar(reader); |
| break; |
| |
| } |
| break; |
| |
| case REPEATED: |
| gen.writeStartArray(); |
| switch (mt) { |
| case FLOAT4: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeFloat(i, reader); |
| } |
| |
| break; |
| case FLOAT8: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeDouble(i, reader); |
| } |
| break; |
| case INT: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeInt(i, reader); |
| } |
| break; |
| case SMALLINT: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeSmallInt(i, reader); |
| } |
| break; |
| case TINYINT: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeTinyInt(i, reader); |
| } |
| break; |
| case BIGINT: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeBigInt(i, reader); |
| } |
| break; |
| case BIT: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeBoolean(i, reader); |
| } |
| break; |
| |
| case DATE: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeDate(i, reader); |
| } |
| break; |
| case TIME: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeTime(i, reader); |
| } |
| break; |
| case TIMESTAMP: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeTimestamp(i, reader); |
| } |
| break; |
| case INTERVALYEAR: |
| case INTERVALDAY: |
| case INTERVAL: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeInterval(i, reader); |
| } |
| break; |
| case DECIMAL28DENSE: |
| case DECIMAL28SPARSE: |
| case DECIMAL38DENSE: |
| case DECIMAL38SPARSE: |
| case DECIMAL9: |
| case DECIMAL18: |
| case VARDECIMAL: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeDecimal(i, reader); |
| } |
| break; |
| |
| case LIST: |
| for(int i = 0; i < reader.size(); i++){ |
| while(reader.next()){ |
| writeValue(reader.reader()); |
| } |
| } |
| break; |
| case MAP: |
| while(reader.next()){ |
| gen.writeStartObject(); |
| for(String name : reader){ |
| FieldReader mapField = reader.reader(name); |
| if(mapField.isSet()){ |
| gen.writeFieldName(name); |
| writeValue(mapField); |
| } |
| } |
| gen.writeEndObject(); |
| } |
| break; |
| case NULL: |
| break; |
| |
| case VAR16CHAR: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeVar16Char(i, reader); |
| } |
| break; |
| case VARBINARY: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeBinary(i, reader); |
| } |
| break; |
| case VARCHAR: |
| for(int i = 0; i < reader.size(); i++){ |
| gen.writeVarChar(i, reader); |
| } |
| break; |
| |
| default: |
| throw new IllegalStateException(String.format("Unable to handle type %s.", mt)); |
| } |
| gen.writeEndArray(); |
| break; |
| } |
| |
| } |
| |
| } |