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com.aliyuncs.utils.FlattenMapUtil Maven / Gradle / Ivy
Aliyun Open API SDK for Java
Copyright (C) Alibaba Cloud Computing
All rights reserved.
版权所有 （C）阿里云计算有限公司
http://www.aliyun.com
package com.aliyuncs.utils;
import java.util.*;
public class FlattenMapUtil {
public static List> toListMap(Map flattenMap, String prefix) {
MapUtils mapUtils = new MapUtils();
return mapUtils.convertMapToListMap(flattenMap, prefix);
}
public static Map toMap(Map flattenMap, String prefix) {
MapUtils mapUtils = new MapUtils();
return mapUtils.convertMapToMap(flattenMap, prefix);
}
public static Object put(Map flattenMap, Object object, String[] subKeys, int subKeysIndex) {
if (subKeysIndex >= subKeys.length) {
return object;
}
String key = subKeys[subKeysIndex];
if (key.endsWith("]")) {
int index = parseIndex(key);
if (index == -1) {
return null;
}
ArrayList arrayList;
if (object == null) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < subKeysIndex; i++) {
sb.append(subKeys[i]).append(".");
}
sb.append(key);
int length = parseLength(flattenMap, sb.toString());
if (length == -1) {
return null;
}
arrayList = new ArrayList(Collections.nCopies(length, null));
} else {
arrayList = (ArrayList) object;
}
if (subKeys.length == subKeysIndex + 1) {
arrayList.set(index, flattenMap.get(stringJoin(".", subKeys)));
return arrayList;
} else {
arrayList.set(index, put(flattenMap, arrayList.get(index), subKeys, subKeysIndex + 1));
return arrayList;
}
} else {
HashMap hashMap;
if (object == null) {
hashMap = new HashMap();
} else {
hashMap = (HashMap) object;
}
if (subKeys.length == subKeysIndex + 1) {
hashMap.put(key, flattenMap.get(stringJoin(".", subKeys)));
return hashMap;
} else {
hashMap.put(key, put(flattenMap, hashMap.get(key), subKeys, subKeysIndex + 1));
return hashMap;
}
}
}
public static Object putForMap(Map flattenMap, Object object, String[] subKeys, int subKeysIndex) {
if (subKeysIndex >= subKeys.length) {
return object;
}
String key = subKeys[subKeysIndex];
if (key.endsWith("]")) {
int index = parseIndex(key);
if (index == -1) {
return null;
}
if (object != null && !(object instanceof HashMap)) {
return null;
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < subKeysIndex; i++) {
sb.append(subKeys[i]).append(".");
}
sb.append(key);
int length = parseLength(flattenMap, sb.toString());
if (length == -1) {
return null;
}
String name = parseArrayName(key);
ArrayList arrayList;
HashMap hashMap;
if (object != null) {
hashMap = (HashMap) object;
if (!(hashMap.get(name) instanceof ArrayList)) {
arrayList = new ArrayList(Collections.nCopies(length, null));
hashMap.put(name, arrayList);
} else {
arrayList = (ArrayList) hashMap.get(name);
}
} else {
hashMap = new HashMap();
arrayList = new ArrayList(Collections.nCopies(length, null));
hashMap.put(name, arrayList);
object = hashMap;
}
if (subKeys.length == subKeysIndex + 1) {
arrayList.set(index, flattenMap.get(stringJoin(".", subKeys)));
return object;
} else {
arrayList.set(index, putForMap(flattenMap, arrayList.get(index), subKeys, subKeysIndex + 1));
return object;
}
} else {
HashMap hashMap;
if (object == null) {
hashMap = new HashMap();
} else {
hashMap = (HashMap) object;
}
if (subKeys.length == subKeysIndex + 1) {
hashMap.put(key, flattenMap.get(stringJoin(".", subKeys)));
return hashMap;
} else {
hashMap.put(key, putForMap(flattenMap, hashMap.get(key), subKeys, subKeysIndex + 1));
return hashMap;
}
}
}
public static int parseIndex(String key) {
int start = key.indexOf("[");
int end = key.indexOf("]");
if (start == -1 || end == -1 || end <= start) {
return -1;
}
try {
return Integer.parseInt(key.substring(start + 1, end));
} catch (Exception e) {
return -1;
}
}
public static int parseLength(Map flattenMap, String key) {
int end = key.lastIndexOf("[");
if (end == -1) {
return -1;
}
try {
return Integer.parseInt(flattenMap.get(key.substring(0, end) + ".Length"));
} catch (Exception e) {
return -1;
}
}
public static String parseArrayName(String key) {
if (key == null) {
return null;
}
int end = key.lastIndexOf("[");
if (end == -1) {
return null;
}
return key.substring(0, end);
}
public static String stringJoin(String delimiter, String... sequences) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < sequences.length; i++) {
sb.append(sequences[i]);
if (i < sequences.length - 1) {
sb.append(delimiter);
}
}
return sb.toString();
}
}
