| /* |
| * 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.nifi.json; |
| |
| import org.apache.nifi.schema.inference.HierarchicalSchemaInference; |
| import org.apache.nifi.schema.inference.TimeValueInference; |
| import org.apache.nifi.serialization.record.DataType; |
| import org.apache.nifi.serialization.record.RecordFieldType; |
| import org.apache.nifi.serialization.record.RecordSchema; |
| import org.codehaus.jackson.JsonNode; |
| import org.codehaus.jackson.node.ArrayNode; |
| import org.codehaus.jackson.node.DecimalNode; |
| |
| import java.math.BigDecimal; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.function.BiConsumer; |
| import java.util.function.Consumer; |
| |
| public class JsonSchemaInference extends HierarchicalSchemaInference<JsonNode> { |
| |
| private final TimeValueInference timeValueInference; |
| |
| public JsonSchemaInference(final TimeValueInference timeValueInference) { |
| this.timeValueInference = timeValueInference; |
| } |
| |
| |
| protected DataType getDataType(final JsonNode jsonNode) { |
| if (jsonNode.isTextual()) { |
| final String text = jsonNode.getTextValue(); |
| if (text == null) { |
| return RecordFieldType.STRING.getDataType(); |
| } |
| |
| final Optional<DataType> timeDataType = timeValueInference.getDataType(text); |
| return timeDataType.orElse(RecordFieldType.STRING.getDataType()); |
| } |
| |
| if (jsonNode.isObject()) { |
| final RecordSchema schema = createSchema(jsonNode); |
| return RecordFieldType.RECORD.getRecordDataType(schema); |
| } |
| |
| if (jsonNode.isIntegralNumber()) { |
| if (jsonNode.isBigInteger()) { |
| return RecordFieldType.BIGINT.getDataType(); |
| } |
| if (jsonNode.isLong()) { |
| return RecordFieldType.LONG.getDataType(); |
| } |
| return RecordFieldType.INT.getDataType(); |
| } |
| |
| if (jsonNode.isBigDecimal()) { |
| final DecimalNode decimalNode = (DecimalNode) jsonNode; |
| final BigDecimal value = decimalNode.getDecimalValue(); |
| return RecordFieldType.DECIMAL.getDecimalDataType(value.precision(), value.scale()); |
| } |
| |
| if (jsonNode.isFloatingPointNumber()) { |
| return RecordFieldType.DOUBLE.getDataType(); |
| } |
| if (jsonNode.isBinary()) { |
| return RecordFieldType.ARRAY.getArrayDataType(RecordFieldType.BYTE.getDataType()); |
| } |
| if (jsonNode.isBoolean()) { |
| return RecordFieldType.BOOLEAN.getDataType(); |
| } |
| |
| return null; |
| } |
| |
| @Override |
| protected boolean isObject(final JsonNode value) { |
| return value.isObject(); |
| } |
| |
| @Override |
| protected boolean isArray(final JsonNode value) { |
| return value.isArray(); |
| } |
| |
| @Override |
| protected void forEachFieldInRecord(final JsonNode rawRecord, final BiConsumer<String, JsonNode> fieldConsumer) { |
| final Iterator<Map.Entry<String, JsonNode>> itr = rawRecord.getFields(); |
| while (itr.hasNext()) { |
| final Map.Entry<String, JsonNode> entry = itr.next(); |
| final String fieldName = entry.getKey(); |
| final JsonNode value = entry.getValue(); |
| |
| fieldConsumer.accept(fieldName, value); |
| } |
| } |
| |
| @Override |
| protected void forEachRawRecordInArray(final JsonNode arrayRecord, final Consumer<JsonNode> rawRecordConsumer) { |
| final ArrayNode arrayNode = (ArrayNode) arrayRecord; |
| for (final JsonNode element : arrayNode) { |
| rawRecordConsumer.accept(element); |
| } |
| } |
| |
| @Override |
| protected String getRootName(final JsonNode rawRecord) { |
| return null; |
| } |
| } |