package com.changhong.epc.demo;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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public class SelectList implements Collection<Map> {
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protected List<Map> list = new LinkedList<>();
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protected boolean distory = false;
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protected Map first;
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protected Map newObj;
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@Override
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public boolean add(Map e) {
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if(first == null || Objects.equals(first.get("rowNo"), e.get("rowNo"))){
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getNewObj()
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.put(e.get("eleCode"), e.get("eleValue"));
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}else{
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list.add(getNewObj());
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newObj = null;
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getNewObj()
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.put(e.get("eleCode"), e.get("eleValue"));
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}
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first = e;
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return false;
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}
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public Map getNewObj(){
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return newObj == null ? (newObj = new HashMap<>()) : newObj;
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}
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// protected abstract R newInstanceR();
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@Override
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public int size() {
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return list.size();
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}
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@Override
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public boolean isEmpty() {
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return list.isEmpty();
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}
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@Override
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public boolean contains(Object o) {
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return list.contains(o);
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}
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@Override
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public Iterator<Map> iterator() {
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return null;
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}
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@Override
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public Object[] toArray() {
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distory();
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return list.toArray();
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}
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@Override
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public <T> T[] toArray(T[] a) {
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distory();
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return list.toArray(a);
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}
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private void distory() {
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if(!distory){
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toArrayFilter();
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distory = true;
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}
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}
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/**
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* 获得返回数组
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*/
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protected void toArrayFilter(){
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list.add(getNewObj());
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newObj = null;
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}
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/**
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* 获得整理后的list
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* @return
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*/
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public List<Map> getList(){
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distory();
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return list;
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}
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@Override
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public boolean remove(Object o) {
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return list.remove(o);
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}
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@Override
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public boolean containsAll(Collection<?> c) {
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return list.containsAll(c);
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}
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@Override
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public boolean addAll(Collection<? extends Map> c) {
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return false;
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}
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@Override
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public boolean removeAll(Collection<?> c) {
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return list.removeAll(c);
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}
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@Override
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public boolean retainAll(Collection<?> c) {
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return list.retainAll(c);
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}
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@Override
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public void clear() {
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list.clear();
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}
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}
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