| /* |
| * 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.store.easy.json.values; |
| |
| import org.apache.drill.exec.store.easy.json.loader.JsonLoaderImpl; |
| import org.apache.drill.exec.store.easy.json.parser.TokenIterator; |
| import org.apache.drill.exec.vector.accessor.ScalarWriter; |
| |
| import com.fasterxml.jackson.core.JsonToken; |
| |
| /** |
| * Listener for JSON Boolean fields. Allows conversion from numeric |
| * fields (with the usual semantics: 0 = false, ~0 = true) and from |
| * strings (using Java Boolean parsing semantics.) |
| */ |
| public class BooleanListener extends ScalarListener { |
| |
| public BooleanListener(JsonLoaderImpl loader, ScalarWriter writer) { |
| super(loader, writer); |
| } |
| |
| @Override |
| public void onValue(JsonToken token, TokenIterator tokenizer) { |
| boolean value; |
| switch (token) { |
| case VALUE_NULL: |
| setNull(); |
| return; |
| case VALUE_TRUE: |
| value = true; |
| break; |
| case VALUE_FALSE: |
| value = false; |
| break; |
| case VALUE_NUMBER_INT: |
| value = tokenizer.longValue() != 0; |
| break; |
| case VALUE_NUMBER_FLOAT: |
| value = tokenizer.doubleValue() != 0; |
| break; |
| case VALUE_STRING: |
| parseString(tokenizer.stringValue()); |
| return; |
| default: |
| // Won't get here: the Jackson parser catches |
| // errors. |
| throw tokenizer.invalidValue(token); |
| } |
| addValueToListenerMap(writer.schema().name(), value); |
| writer.setBoolean(value); |
| } |
| |
| private void parseString(String value) { |
| value = value.trim(); |
| if (value.isEmpty()) { |
| setNull(); |
| } else { |
| addValueToListenerMap(writer.schema().name(), value); |
| writer.setBoolean(Boolean.parseBoolean(value.trim())); |
| } |
| } |
| |
| @Override |
| protected void setArrayNull() { |
| writer.setBoolean(false); |
| } |
| } |