移动 MapWrapper 所在包。

src/main/java/xyz/zhouxy/plusone/commons/collection/AbstractMapWrapper.java

@@ -0,0 +1,208 @@
+/*
+ * Copyright 2022-2023 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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 xyz.zhouxy.plusone.commons.collection;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+import javax.annotation.Nullable;
+
+import com.google.common.annotations.Beta;
+
+@Beta
+public abstract class AbstractMapWrapper<K, V, T extends AbstractMapWrapper<K, V, T>> {
+
+    private final Map<K, V> map;
+    private final Consumer<K> keyChecker;
+    private final Consumer<V> valueChecker;
+
+    protected AbstractMapWrapper(Map<K, V> map, @Nullable Consumer<K> keyChecker, @Nullable Consumer<V> valueChecker) {
+        this.map = map;
+        this.keyChecker = keyChecker;
+        this.valueChecker = valueChecker;
+    }
+
+    public final T put(K key, V value) {
+        if (this.keyChecker != null) {
+            this.keyChecker.accept(key);
+        }
+        if (this.valueChecker != null) {
+            this.valueChecker.accept(value);
+        }
+        this.map.put(key, value);
+        return getSelf();
+    }
+
+    public final T putAll(Map<? extends K, ? extends V> m) {
+        for (Entry<? extends K, ? extends V> entry : m.entrySet()) {
+            put(entry.getKey(), entry.getValue());
+        }
+        return getSelf();
+    }
+
+    /**
+     * 获取 {@code map} 中的值。如果 {@code key} 不存在，则抛出异常。
+     * 将 {@code value}（可为 {@code null}）装进 {@link Optional} 中后返回。
+     * <i>为了这碟醋包的这盘饺子。</i>
+     *
+     * @param key 键
+     * @return 可缺失的值
+     * @throws IllegalArgumentException key 不存在时抛出。
+     */
+    public Optional<V> get(K key) {
+        if (!this.map.containsKey(key)) {
+            throw new IllegalArgumentException("Key does not exist");
+        }
+        return Optional.ofNullable(this.map.get(key));
+    }
+
+    /**
+     * 获取 {@code map} 中的值。如果 {@code key} 不存在，则抛出异常。
+     *
+     * @param key 键
+     * @return 值
+     * @throws IllegalArgumentException key 不存在时抛出。
+     */
+    @Nullable
+    public V getOrNull(K key) {
+        if (!this.map.containsKey(key)) {
+            throw new IllegalArgumentException("Key does not exist");
+        }
+        return this.map.get(key);
+    }
+
+    @SuppressWarnings("unchecked")
+    public final <R> Optional<R> getAndConvert(K key) {
+        return get(key).map(v -> (R) v);
+    }
+
+    public final <R> Optional<R> getAndConvert(K key, Function<V, R> mapper) {
+        return get(key).map(mapper);
+    }
+
+    public final boolean containsKey(Object key) {
+        return this.map.containsKey(key);
+    }
+
+    public final int size() {
+        return this.map.size();
+    }
+
+    public final Set<K> keySet() {
+        return this.map.keySet();
+    }
+
+    public final Collection<V> values() {
+        return this.map.values();
+    }
+
+    public final Set<Entry<K, V>> entrySet() {
+        return this.map.entrySet();
+    }
+
+    public final void clear() {
+        this.map.clear();
+    }
+
+    public final boolean containsValue(Object value) {
+        return this.map.containsValue(value);
+    }
+
+    public final boolean isEmpty() {
+        return this.map.isEmpty();
+    }
+
+    public final V remove(Object key) {
+        return this.map.remove(key);
+    }
+
+    public final V putIfAbsent(K key, V value) {
+        return this.map.putIfAbsent(key, value);
+    }
+
+    public final V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) {
+        V v = this.map.get(key);
+        if (null == v) {
+            this.map.putIfAbsent(key, mappingFunction.apply(key));
+            v = this.map.get(key);
+        }
+        return v;
+    }
+
+    public final Map<K, V> exportMap() {
+        return this.map;
+    }
+
+    public final Map<K, V> exportUnmodifiableMapMap() {
+        return Collections.unmodifiableMap(this.map);
+    }
+
+    protected abstract T getSelf();
+
+    @Override
+    public String toString() {
+        return this.map.toString();
+    }
+
+    public abstract static class Builder<K, V, T extends AbstractMapWrapper<K, V, T>> {
+        protected final Map<K, V> map;
+        protected Consumer<K> keyChecker;
+        protected Consumer<V> valueChecker;
+
+        protected Builder(Map<K, V> map) {
+            this.map = map;
+        }
+
+        public Builder<K, V, T> keyChecker(@Nullable Consumer<K> keyChecker) {
+            this.keyChecker = keyChecker;
+            return this;
+        }
+
+        public Builder<K, V, T> valueChecker(@Nullable Consumer<V> valueChecker) {
+            this.valueChecker = valueChecker;
+            return this;
+        }
+
+        public Builder<K, V, T> put(K key, V value) {
+            if (this.keyChecker != null) {
+                this.keyChecker.accept(key);
+            }
+            if (this.valueChecker != null) {
+                this.valueChecker.accept(value);
+            }
+            this.map.put(key, value);
+            return this;
+        }
+
+        public Builder<K, V, T> putAll(Map<? extends K, ? extends V> m) {
+            for (Entry<? extends K, ? extends V> entry : m.entrySet()) {
+                put(entry.getKey(), entry.getValue());
+            }
+            return this;
+        }
+
+        public abstract T build();
+
+        public abstract T buildUnmodifiableMap();
+    }
+}