| 1 | /* | |
| 2 | * Copyright 2004 the original author or authors. | |
| 3 | * | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 | * you may not use this file except in compliance with the License. | |
| 6 | * You may obtain a copy of the License at | |
| 7 | * | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 | * | |
| 10 | * Unless required by applicable law or agreed to in writing, software | |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 | * See the License for the specific language governing permissions and | |
| 14 | * limitations under the License. | |
| 15 | */ | |
| 16 | package com.ancientprogramming.fixedformat4j.io.read; | |
| 17 | ||
| 18 | import java.util.LinkedHashMap; | |
| 19 | import java.util.Map; | |
| 20 | import java.util.Objects; | |
| 21 | import java.util.function.Consumer; | |
| 22 | ||
| 23 | /** | |
| 24 | * A per-call registry of typed record handlers for use with | |
| 25 | * {@link FixedFormatReader#process}. | |
| 26 | * | |
| 27 | * <p>Register one handler per record class via the fluent {@link #on} method, then pass | |
| 28 | * the registry to {@link FixedFormatReader#process}. Classes not registered are silently | |
| 29 | * ignored — they are still parsed, but no handler is invoked.</p> | |
| 30 | * | |
| 31 | * <pre>{@code | |
| 32 | * reader.process(Path.of("data.txt"), new HandlerRegistry() | |
| 33 | * .on(HeaderRecord.class, this::onHeader) | |
| 34 | * .on(DetailRecord.class, this::onDetail)); | |
| 35 | * }</pre> | |
| 36 | * | |
| 37 | * <p>Because {@code HandlerRegistry} instances are created at the call site rather than | |
| 38 | * stored in the reader, the same {@link FixedFormatReader} can safely be used from multiple | |
| 39 | * threads with independent registries.</p> | |
| 40 | * | |
| 41 | * @author Jacob von Eyben - <a href="https://eybenconsult.com">https://eybenconsult.com</a> | |
| 42 | * @since 1.8.0 | |
| 43 | */ | |
| 44 | public final class HandlerRegistry { | |
| 45 | ||
| 46 |
2
1. <init> : Removed assignment to member variable handlers → KILLED 2. <init> : removed call to java/util/LinkedHashMap::<init> → KILLED |
private final Map<Class<?>, Consumer<?>> handlers = new LinkedHashMap<>(); |
| 47 | ||
| 48 | /** | |
| 49 | * Registers a typed handler for {@code clazz}. | |
| 50 | * | |
| 51 | * <p>If a handler has already been registered for {@code clazz}, it is replaced by this | |
| 52 | * call. Only the most recently registered handler for a given class is invoked.</p> | |
| 53 | * | |
| 54 | * @param <R> the record type | |
| 55 | * @param clazz the record class; must not be {@code null} | |
| 56 | * @param handler invoked with each parsed record of type {@code R}; must not be {@code null} | |
| 57 | * @return this registry (for chaining) | |
| 58 | */ | |
| 59 | public <R> HandlerRegistry on(Class<R> clazz, Consumer<R> handler) { | |
| 60 |
4
1. on : replaced call to java/util/Objects::requireNonNull with argument → SURVIVED 2. on : replaced call to java/util/Map::put with argument → KILLED 3. on : removed call to java/util/Map::put → KILLED 4. on : removed call to java/util/Objects::requireNonNull → KILLED |
handlers.put(Objects.requireNonNull(clazz, "clazz must not be null"), |
| 61 |
2
1. on : replaced call to java/util/Objects::requireNonNull with argument → SURVIVED 2. on : removed call to java/util/Objects::requireNonNull → KILLED |
Objects.requireNonNull(handler, "handler must not be null")); |
| 62 |
1
1. on : replaced return value with null for com/ancientprogramming/fixedformat4j/io/read/HandlerRegistry::on → KILLED |
return this; |
| 63 | } | |
| 64 | ||
| 65 | /** | |
| 66 | * Dispatches {@code record} to the handler registered for {@code clazz}, if any. | |
| 67 | * Package-private: only {@link FixedFormatReader} calls this. | |
| 68 | * | |
| 69 | * <p>The unchecked cast is safe by construction: {@link #on} always aligns the class key | |
| 70 | * with the consumer's type parameter.</p> | |
| 71 | */ | |
| 72 | @SuppressWarnings("unchecked") | |
| 73 | void dispatch(Class<?> clazz, Object record) { | |
| 74 |
2
1. dispatch : replaced call to java/util/Map::get with argument → KILLED 2. dispatch : removed call to java/util/Map::get → KILLED |
Consumer<Object> handler = (Consumer<Object>) handlers.get(clazz); |
| 75 |
3
1. dispatch : negated conditional → KILLED 2. dispatch : removed conditional - replaced equality check with false → KILLED 3. dispatch : removed conditional - replaced equality check with true → KILLED |
if (handler != null) { |
| 76 |
1
1. dispatch : removed call to java/util/function/Consumer::accept → KILLED |
handler.accept(record); |
| 77 | } | |
| 78 | } | |
| 79 | } | |
Mutations | ||
| 46 |
1.1 2.2 |
|
| 60 |
1.1 2.2 3.3 4.4 |
|
| 61 |
1.1 2.2 |
|
| 62 |
1.1 |
|
| 74 |
1.1 2.2 |
|
| 75 |
1.1 2.2 3.3 |
|
| 76 |
1.1 |