All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.foxinmy.weixin4j.util.LinkedCaseInsensitiveMap Maven / Gradle / Ivy

There is a newer version: 1.10.2
Show newest version
/*
 * Copyright 2002-2012 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
 *
 *      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 com.foxinmy.weixin4j.util;

import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Locale;
import java.util.Map;

/**
 * {@link LinkedHashMap} variant that stores String keys in a case-insensitive
 * manner, for example for key-based access in a results table.
 *
 * 

* Preserves the original order as well as the original casing of keys, while * allowing for contains, get and remove calls with any case of key. * *

* Does not support {@code null} keys. * * @author Juergen Hoeller * @since 3.0 */ @SuppressWarnings("serial") public class LinkedCaseInsensitiveMap extends LinkedHashMap { private final Map caseInsensitiveKeys; private final Locale locale; /** * Create a new LinkedCaseInsensitiveMap for the default Locale. * * @see java.lang.String#toLowerCase() */ public LinkedCaseInsensitiveMap() { this(null); } /** * Create a new LinkedCaseInsensitiveMap that stores lower-case keys * according to the given Locale. * * @param locale * the Locale to use for lower-case conversion * @see java.lang.String#toLowerCase(java.util.Locale) */ public LinkedCaseInsensitiveMap(Locale locale) { super(); this.caseInsensitiveKeys = new HashMap(); this.locale = (locale != null ? locale : Locale.getDefault()); } /** * Create a new LinkedCaseInsensitiveMap that wraps a {@link LinkedHashMap} * with the given initial capacity and stores lower-case keys according to * the default Locale. * * @param initialCapacity * the initial capacity * @see java.lang.String#toLowerCase() */ public LinkedCaseInsensitiveMap(int initialCapacity) { this(initialCapacity, null); } /** * Create a new LinkedCaseInsensitiveMap that wraps a {@link LinkedHashMap} * with the given initial capacity and stores lower-case keys according to * the given Locale. * * @param initialCapacity * the initial capacity * @param locale * the Locale to use for lower-case conversion * @see java.lang.String#toLowerCase(java.util.Locale) */ public LinkedCaseInsensitiveMap(int initialCapacity, Locale locale) { super(initialCapacity); this.caseInsensitiveKeys = new HashMap(initialCapacity); this.locale = (locale != null ? locale : Locale.getDefault()); } @Override public V put(String key, V value) { String oldKey = this.caseInsensitiveKeys.put(convertKey(key), key); if (oldKey != null && !oldKey.equals(key)) { super.remove(oldKey); } return super.put(key, value); } @Override public void putAll(Map map) { if (map.isEmpty()) { return; } for (Map.Entry entry : map.entrySet()) { put(entry.getKey(), entry.getValue()); } } @Override public boolean containsKey(Object key) { return (key instanceof String && this.caseInsensitiveKeys .containsKey(convertKey((String) key))); } @Override public V get(Object key) { if (key instanceof String) { return super.get(this.caseInsensitiveKeys .get(convertKey((String) key))); } else { return null; } } @Override public V remove(Object key) { if (key instanceof String) { return super.remove(this.caseInsensitiveKeys .remove(convertKey((String) key))); } else { return null; } } @Override public void clear() { this.caseInsensitiveKeys.clear(); super.clear(); } /** * Convert the given key to a case-insensitive key. *

* The default implementation converts the key to lower-case according to * this Map's Locale. * * @param key * the user-specified key * @return the key to use for storing * @see java.lang.String#toLowerCase(java.util.Locale) */ protected String convertKey(String key) { return key != null ? key.toLowerCase(this.locale) : null; } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy