code.ponfee.commons.schema.json

类 JsonExtractUtils

java.lang.Object

code.ponfee.commons.schema.json.JsonExtractUtils

public final class JsonExtractUtils
extends Object

The utility class for extract json schema and data

作者:

Ponfee

构造器概要

构造器

构造器和说明
JsonExtractUtils()

方法概要

限定符和类型	方法和说明
static void	append(List<List<Object>> dataset, List<List<Object>> subset) Appends the sub dataset after dataset last row, as new row [[1,2], [3,4]] append [["a","b"], ["c","d"]] => [[1,2], [3,4], ["a","b"], ["c","d"]]
static void	concat(List<List<Object>> dataset, List<List<Object>> subset) Concats the sub dataset after dataset last column, as new column [[1,2], [3,4]] concat [["a","b"], ["c","d"]] => [[1,2,"a","b"], [3,4,"c","d"]]
static void	concat(List<List<Object>> dataset, Object value) Concats the sub dataset after dataset last column, as new column [[1,2], [3,4]] concat "a" => [[1,2,"a"], [3,4,"a"]]
static TableStructure	extractData(Object object, JsonTree tree) Returns a DataStructure object by user specified json columns in tree
static DataStructure	extractData(String original, JsonTree tree)
static TreeNode<JsonId,Null>	extractSchema(Object obj) Returns a tree data of extracted the json data structure schema
static TreeNode<JsonId,Null>	extractSchema(String text)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

JsonExtractUtils

public JsonExtractUtils()

方法详细资料

extractSchema

public static TreeNode<JsonId,Null> extractSchema(String text)
                                           throws ParseException

抛出:

ParseException

extractSchema

public static TreeNode<JsonId,Null> extractSchema(Object obj)
                                           throws ParseException

Returns a tree data of extracted the json data structure schema

参数:

obj - the object of use JSON.parse(String) parsed

返回:

a tree node of json data schema

抛出:

ParseException

extractData

public static DataStructure extractData(String original,
                                        @Nonnull
                                        JsonTree tree)

extractData

public static TableStructure extractData(@Nonnull
                                         Object object,
                                         @Nonnull
                                         JsonTree tree)

Returns a DataStructure object by user specified json columns in tree

参数:

object - the object of use JSON.parse(String) parsed

tree - the json tree

返回:

a DataStructure object

append

public static void append(List<List<Object>> dataset,
                          List<List<Object>> subset)

Appends the sub dataset after dataset last row, as new row [[1,2], [3,4]] append [["a","b"], ["c","d"]] => [[1,2], [3,4], ["a","b"], ["c","d"]]

参数:

dataset - the dataset

subset - the sub dataset

concat

public static void concat(List<List<Object>> dataset,
                          Object value)

Concats the sub dataset after dataset last column, as new column [[1,2], [3,4]] concat "a" => [[1,2,"a"], [3,4,"a"]]

参数:

dataset - the dataset

value - the new column vlaue

concat

public static void concat(List<List<Object>> dataset,
                          List<List<Object>> subset)

Concats the sub dataset after dataset last column, as new column [[1,2], [3,4]] concat [["a","b"], ["c","d"]] => [[1,2,"a","b"], [3,4,"c","d"]]

参数:

dataset - the dataset

subset - the sub dataset