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@ -69,6 +69,13 @@ public class BeanRelation {
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return temp;
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}
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/**
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* 获取关联对象
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* @param bean 实体对象
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* @param holder 关联路径
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* @param <T> 返回关联对象的实体类型
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* @return 若存在多个关联则只取第一个。
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*/
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public static <T extends BaseBean> T get(BaseBean bean, Enum<?> holder) {
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List<T> beans = (List<T>)get(bean).get(holder);
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if (beans == null || beans.isEmpty()) {
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@ -77,10 +84,27 @@ public class BeanRelation {
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return beans.get(0);
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}
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/**
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* 获取关联对象
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* @param bean 实体对象
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* @param holder 第一个关联路径
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* @param args 后续关联路径
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* @param <T> 返回关联对象的实体类型
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* @return 若存在多个关联则只取第一个。
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*/
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public static <T extends BaseBean> T get(BaseBean bean, Enum<?> holder, Enum<?>... args) {
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return get(bean, null, holder, args);
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}
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/**
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* 根据筛选条件获取关联对象
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* @param bean 实体对象
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* @param pred Lambda表达式，用来筛选关联对象，返回true则符合筛选条件
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* @param holder 第一个关联路径
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* @param args 后续关联路径
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* @param <T> 返回关联对象的实体类型
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* @return 只找第一个符合筛选条件的关联对象。
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*/
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public static <T extends BaseBean> T get(BaseBean bean, Predicate<T> pred, Enum<?> holder, Enum<?>... args) {
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List<BaseBean> nextBeans = list(bean, holder);
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for (BaseBean nextEntity : nextBeans) {
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@ -111,6 +135,13 @@ public class BeanRelation {
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return null;
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}
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/**
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* 获取关联对象集合
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* @param bean 实体对象
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* @param holder 关联路径
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* @param <T> 返回关联对象的实体类型
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* @return 返回的List集合非拷贝的，外界不能对其修改。
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*/
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public static <T extends BaseBean> List<T> list(BaseBean bean, Enum<?> holder) {
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List<T> beans = (List<T>)get(bean).get(holder);
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if (beans == null) {
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@ -119,10 +150,27 @@ public class BeanRelation {
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return beans;
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}
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/**
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* 获取关联对象集合
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* @param bean 实体对象
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* @param holder 第一个关联路径
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* @param args 后续关联路径
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* @param <T> 返回关联对象的实体类型
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* @return 返回的List集合为拷贝的，外界可以对其修改。
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*/
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public static <T extends BaseBean> List<T> list(BaseBean bean, Enum<?> holder, Enum<?>... args) {
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return list(bean, null, holder, args);
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}
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/**
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* 获取符合筛选条件的关联对象集合
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* @param bean 实体对象
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* @param pred Lambda筛选表达式，返回true为筛选出来的对象。
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* @param holder 第一个关联路径
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* @param args 后续关联路径
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* @param <T> 返回关联对象的实体类型
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* @return 返回的List集合为拷贝的，外界可以对其修改。
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*/
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public static <T extends BaseBean> List<T> list(BaseBean bean, Predicate<T> pred, Enum<?> holder, Enum<?>... args) {
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List<T> result = new ArrayList<>();
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List<BaseBean> nextBeans = list(bean, holder);
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@ -157,6 +205,38 @@ public class BeanRelation {
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}
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}
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public static <T extends BaseBean> List<T> lastList(BaseBean entity, Enum<?>... args) {
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List<T> result = new ArrayList<T>();
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lastListImpl(result, entity, null, args, 0);
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return result;
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}
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public static <T extends BaseBean> List<T> lastList(BaseBean entity, Predicate<T> filter, Enum<?>... args) {
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List<T> result = new ArrayList<T>();
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lastListImpl(result, entity, filter, args, 0);
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return result;
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}
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@SuppressWarnings("unchecked")
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private final static <T extends BaseBean> boolean lastListImpl(List<T> result, BaseBean entity, Predicate<T> filter,
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Enum<?>[] args, int index) {
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if (index >= args.length) {
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index = 0;
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}
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boolean bNotLast = true;
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List<BaseBean> relaEntities = list(entity, args[index]);
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for (BaseBean relaEntity : relaEntities) {
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if (lastListImpl(result, relaEntity, filter, args, index + 1)) {
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result.add((T)relaEntity);
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bNotLast = false;
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}
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}
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return index == 0 && bNotLast;
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}
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/**
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|
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* 设值两个对象之间的关联
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*
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@ -282,4 +362,42 @@ public class BeanRelation {
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}
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}
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}
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/**
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* 按指定路径，递归调用lambda表达式，当lambda表达式返回false或路径存在循环则退出递归。
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* @param bean
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* @param fun
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* @param holders
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* @param <T>
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*/
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public static <T extends BaseBean> void recursion(BaseBean bean, Predicate<T> fun, Enum<?>... holders) {
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if (holders.length == 0) {
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return;
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}
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recursionImpl(bean, fun, holders, 0);
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}
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/**
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* 按指定路径，递归调用实现。采用广度优先搜索。
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* @param bean
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* @param fun
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* @param holders
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* @param index
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* @param <T>
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*/
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@SuppressWarnings("unchecked")
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private final static <T extends BaseBean> void recursionImpl(BaseBean bean, Predicate<T> fun,
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Enum<?>[] holders, int index) {
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if (index >= holders.length) {
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if (!fun.test((T) bean)) {
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return;
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}
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index = 0;
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}
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List<BaseBean> relaBeans = list(bean, holders[index]);
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for (BaseBean relaBean : relaBeans) {
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recursionImpl(relaBean, fun, holders, index + 1);
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}
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}
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}
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