com.github.dennisit.vplus.data.criteria.action.AssemAction Maven / Gradle / Ivy
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package com.github.dennisit.vplus.data.criteria.action;
import com.github.dennisit.vplus.data.criteria.AssemCriteria;
import com.github.dennisit.vplus.data.criteria.AtomicCriteria;
import com.google.common.collect.Lists;
import lombok.Data;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* Created by Elon.su on 17/9/16.
*/
public class AssemAction {
private AssemAction(){}
/**
* assemble，assem assemblyList for baseDataList,
* if baseDataList is empty, return empty list,
* if element in assemblyList, not in baseDataList, skip it.
* @param baseDataList target list
* @param assembleList extend list
* @param 基础数据集
* @param 目标数据集
* @return assembled list
*/
public static > List assem(List baseDataList, List assembleList) {
Map baseMap = Optional.ofNullable(baseDataList).orElse(Lists.newArrayList())
.stream().collect(Collectors.toMap(K::uniquely, Function.identity()));
Optional.ofNullable(assembleList).orElse(Lists.newArrayList())
.stream().forEach(x ->{
K k = baseMap.get(x.uniquely());
if(null != k) {
x.assemble(k);
}
}
);
return baseDataList;
}
/**
* 示例行为
*/
@Data
static class AssemMock implements AssemCriteria {
private Integer id;
private String name;
private Integer age;
public AssemMock() {
}
public AssemMock(Integer id) {
this.id = id;
}
public AssemMock(Integer id, String name) {
this.id = id;
this.name = name;
}
public AssemMock(Integer id, Integer age) {
this.id = id;
this.age = age;
}
public AssemMock(Integer id, String name, Integer age) {
this.id = id;
this.name = name;
this.age = age;
}
/**
* define unique key
* @return
*/
@Override
public String uniquely() {
return String.valueOf(id);
}
/**
* define action for assembly
* @param assemMock
* @return
*/
@Override
public AssemMock assemble(AssemMock assemMock) {
if(null != getId()){
assemMock.setId(getId());
}
if(null != getName()){
assemMock.setName(getName());
}
if(null != getAge()){
assemMock.setAge(getAge());
}
return assemMock;
}
}
}