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增强基于SearchFilter的动态查询功能 #479

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增强基于SearchFilter的动态查询功能 #479

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30 changes: 21 additions & 9 deletions modules/core/src/main/java/org/springside/modules/persistence/DynamicSpecifications.java
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Expand Up @@ -8,11 +8,7 @@
import java.util.Collection;
import java.util.List;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Path;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import javax.persistence.criteria.*;

import org.apache.commons.lang3.StringUtils;
import org.springframework.data.jpa.domain.Specification;
Expand All @@ -33,11 +29,27 @@ public Predicate toPredicate(Root<T> root, CriteriaQuery<?> query, CriteriaBuild
// nested path translate, 如Task的名为"user.name"的filedName, 转换为Task.user.name属性
String[] names = StringUtils.split(filter.fieldName, ".");
Path expression = root.get(names[0]);
for (int i = 1; i < names.length; i++) {
expression = expression.get(names[i]);
}
for (int i = 1; i < names.length; i++) {
if (Collection.class.isAssignableFrom(expression.getJavaType())) {
Join parentJoin = null;
for (int j = 0; j < i; j++) {
if (j == 0) {
parentJoin = root.join(names[j]);
} else {
parentJoin = parentJoin.join(names[j]);
}
}
expression = parentJoin.get(names[i]);
} else {
expression = expression.get(names[i]);
}
}

if (expression.getJavaType().isEnum()) {
filter.value = Enum.valueOf(expression.getJavaType(), filter.value.toString());
}

// logic operator
// logic operator
switch (filter.operator) {
case EQ:
predicates.add(builder.equal(expression, filter.value));
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