001/**
002 * Copyright (c) 2015-2022, Michael Yang 杨福海 (fuhai999@gmail.com).
003 * <p>
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 * <p>
008 * http://www.apache.org/licenses/LICENSE-2.0
009 * <p>
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package io.jboot.utils;
017
018import java.time.LocalDate;
019import java.time.LocalDateTime;
020import java.time.LocalTime;
021import java.util.Collection;
022import java.util.Date;
023import java.util.Objects;
024
025/**
026 * @author michael yang (fuhai999@gmail.com)
027 */
028public class ObjectUtil {
029
030
031    /**
032     * 判断 某个 objects 集合里是否包含了某个 object
033     *
034     * @param objects            object 集合
035     * @param compareObject      是否被包 集合 含的对比 object
036     * @param compareAttrGetters 需要对比的 getter
037     * @param <T>
038     * @return true 包含，false 不包含
039     */
040    public static <T> boolean isContainsObject(Collection<T> objects, T compareObject, ObjectFunc<T>... compareAttrGetters) {
041        if (objects == null || objects.isEmpty() || compareObject == null) {
042            return false;
043        }
044
045        if (compareAttrGetters == null || compareAttrGetters.length == 0) {
046            throw new IllegalArgumentException("compareAttrGetters must not be null");
047        }
048
049
050        for (T object : objects) {
051            if (isSameObject(object, compareObject, compareAttrGetters)) {
052                return true;
053            }
054        }
055
056        return false;
057    }
058
059
060    /**
061     * 获取 某个 objects 集合里包含的 object
062     *
063     * @param objects            object 集合
064     * @param compareObject      是否被包 集合 含的对比 object
065     * @param compareAttrGetters 需要对比的 getter
066     * @param <T>
067     * @return 返回 objects 结合中对比成功的 object
068     */
069    public static <T> T getContainsObject(Collection<T> objects, T compareObject, ObjectFunc<T>... compareAttrGetters) {
070        if (objects == null || objects.isEmpty() || compareObject == null) {
071            return null;
072        }
073
074        if (compareAttrGetters == null || compareAttrGetters.length == 0) {
075            throw new IllegalArgumentException("compareAttrGetters must not be null");
076        }
077
078
079        for (T object : objects) {
080            if (isSameObject(object, compareObject, compareAttrGetters)) {
081                return object;
082            }
083        }
084
085        return null;
086    }
087
088
089    /**
090     * 判断两个 Object 是否是同一个 Object，根据传入的 getter 来进行对比
091     *
092     * @param object1
093     * @param object2
094     * @param compareAttrGetters
095     * @param <T>
096     * @return
097     */
098    public static <T> boolean isSameObject(T object1, T object2, ObjectFunc<T>... compareAttrGetters) {
099        if (object1 == null || object2 == null) {
100            return object1 == object2;
101        }
102
103        if (compareAttrGetters == null || compareAttrGetters.length == 0) {
104            throw new IllegalArgumentException("compareAttrGetters must not be null");
105        }
106
107
108        for (ObjectFunc getter : compareAttrGetters) {
109
110            if (getter == null) {
111                throw new IllegalArgumentException("compareAttrGetter must not be null");
112            }
113
114
115            if (!Objects.equals(getter.get(object1), getter.get(object2))) {
116                return false;
117            }
118        }
119
120        return true;
121    }
122
123
124    /**
125     * 判断两个 Object 是否是同一个 Object，根据传入的 getter 来进行对比
126     *
127     * @param object1
128     * @param object2
129     * @param compareAttrGetters
130     * @param <T>
131     * @return
132     */
133    public static <T> boolean notSameObject(T object1, T object2, ObjectFunc<T>... compareAttrGetters) {
134        return !isSameObject(object1, object2, compareAttrGetters);
135    }
136
137
138    public static Object convert(Object value, Class<?> targetClass) {
139        if (value == null || (value.getClass() == String.class && StrUtil.isBlank((String) value)
140                && targetClass != String.class)) {
141            return null;
142        }
143
144        if (value.getClass().isAssignableFrom(targetClass)) {
145            return value;
146        }
147        if (targetClass == String.class) {
148            return value.toString();
149        } else if (targetClass == Integer.class || targetClass == int.class) {
150            if (value instanceof Number) {
151                return ((Number) value).intValue();
152            }
153            return Integer.parseInt(value.toString());
154        } else if (targetClass == Long.class || targetClass == long.class) {
155            if (value instanceof Number) {
156                return ((Number) value).longValue();
157            }
158            return Long.parseLong(value.toString());
159        } else if (targetClass == Double.class || targetClass == double.class) {
160            if (value instanceof Number) {
161                return ((Number) value).doubleValue();
162            }
163            return Double.parseDouble(value.toString());
164        } else if (targetClass == Float.class || targetClass == float.class) {
165            if (value instanceof Number) {
166                return ((Number) value).floatValue();
167            }
168            return Float.parseFloat(value.toString());
169        } else if (targetClass == Boolean.class || targetClass == boolean.class) {
170            String v = value.toString().toLowerCase();
171            if ("1".equals(v) || "true".equalsIgnoreCase(v)) {
172                return Boolean.TRUE;
173            } else if ("0".equals(v) || "false".equalsIgnoreCase(v)) {
174                return Boolean.FALSE;
175            } else {
176                throw new RuntimeException("Can not parse to boolean type of value: \"" + value + "\"");
177            }
178        } else if (targetClass == java.math.BigDecimal.class) {
179            return new java.math.BigDecimal(value.toString());
180        } else if (targetClass == java.math.BigInteger.class) {
181            return new java.math.BigInteger(value.toString());
182        } else if (targetClass == byte[].class) {
183            return value.toString().getBytes();
184        } else if (targetClass == Date.class) {
185            return DateUtil.parseDate(value);
186        } else if (targetClass == LocalDateTime.class) {
187            return DateUtil.toLocalDateTime(DateUtil.parseDate(value));
188        } else if (targetClass == LocalDate.class) {
189            return DateUtil.toLocalDate(DateUtil.parseDate(value));
190        } else if (targetClass == LocalTime.class) {
191            return DateUtil.toLocalTime(DateUtil.parseDate(value));
192        } else if (targetClass == Short.class || targetClass == short.class) {
193            if (value instanceof Number) {
194                return ((Number) value).shortValue();
195            }
196            return Short.parseShort(value.toString());
197        }
198
199        throw new RuntimeException("\"" + targetClass.getName() + "\" can not be parsed.");
200    }
201
202
203    public static Object getPrimitiveDefaultValue(Class<?> paraClass) {
204        if (paraClass == int.class || paraClass == long.class || paraClass == float.class || paraClass == double.class) {
205            return 0;
206        } else if (paraClass == boolean.class) {
207            return Boolean.FALSE;
208        } else if (paraClass == short.class) {
209            return (short) 0;
210        } else if (paraClass == byte.class) {
211            return (byte) 0;
212        } else if (paraClass == char.class) {
213            return '\u0000';
214        } else {
215            //不存在这种类型
216            return null;
217        }
218    }
219
220
221    public static <T> T obtainNotNull(T... ts) {
222        if (ts == null || ts.length == 0) {
223            throw new IllegalArgumentException("Arguments is null or empty.");
224        }
225
226        for (T t : ts) {
227            if (t != null) {
228                return t;
229            }
230        }
231
232        return null;
233    }
234
235}