org.codehaus.jackson

枚举 JsonToken

java.lang.Object

java.lang.Enum<JsonToken>

org.codehaus.jackson.JsonToken

所有已实现的接口:

Serializable, Comparable<JsonToken>

public enum JsonToken
extends Enum<JsonToken>

Enumeration for basic token types used for returning results of parsing JSON content.

枚举常量概要

枚举常量

枚举常量和说明
END_ARRAY START_OBJECT is returned when encountering ']' which signals ending of an Array value
END_OBJECT START_OBJECT is returned when encountering '}' which signals ending of an Object value
FIELD_NAME FIELD_NAME is returned when a String token is encountered as a field name (same lexical value, different function)
NOT_AVAILABLE NOT_AVAILABLE can be returned if JsonParser implementation can not currently return the requested token (usually next one), or even if any will be available, but that may be able to determine this in future.
START_ARRAY START_OBJECT is returned when encountering '[' which signals starting of an Array value
START_OBJECT START_OBJECT is returned when encountering '{' which signals starting of an Object value.
VALUE_EMBEDDED_OBJECT Placeholder token returned when the input source has a concept of embedded Object that are not accessible as usual structure (of starting with START_OBJECT, having values, ending with END_OBJECT), but as "raw" objects.
VALUE_FALSE VALUE_FALSE is returned when encountering literal "false" in value context
VALUE_NULL VALUE_NULL is returned when encountering literal "null" in value context
VALUE_NUMBER_FLOAT VALUE_NUMBER_INT is returned when a numeric token other that is not an integer is encountered: that is, a number that does have floating point or exponent marker in it, in addition to one or more digits.
VALUE_NUMBER_INT VALUE_NUMBER_INT is returned when an integer numeric token is encountered in value context: that is, a number that does not have floating point or exponent marker in it (consists only of an optional sign, followed by one or more digits)
VALUE_STRING VALUE_STRING is returned when a String token is encountered in value context (array element, field value, or root-level stand-alone value)
VALUE_TRUE VALUE_TRUE is returned when encountering literal "true" in value context

方法概要

方法

限定符和类型	方法和说明
byte[]	asByteArray()
char[]	asCharArray()
String	asString()
boolean	isNumeric()
boolean	isScalarValue() Method that can be used to check whether this token represents a valid non-structured value.
static JsonToken	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static JsonToken[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

NOT_AVAILABLE

public static final JsonToken NOT_AVAILABLE

NOT_AVAILABLE can be returned if JsonParser implementation can not currently return the requested token (usually next one), or even if any will be available, but that may be able to determine this in future. This is the case with non-blocking parsers -- they can not block to wait for more data to parse and must return something.

从以下版本开始:

0.9.7

START_OBJECT

public static final JsonToken START_OBJECT

START_OBJECT is returned when encountering '{' which signals starting of an Object value.

END_OBJECT

public static final JsonToken END_OBJECT

START_OBJECT is returned when encountering '}' which signals ending of an Object value

START_ARRAY

public static final JsonToken START_ARRAY

START_OBJECT is returned when encountering '[' which signals starting of an Array value

END_ARRAY

public static final JsonToken END_ARRAY

START_OBJECT is returned when encountering ']' which signals ending of an Array value

FIELD_NAME

public static final JsonToken FIELD_NAME

FIELD_NAME is returned when a String token is encountered as a field name (same lexical value, different function)

VALUE_EMBEDDED_OBJECT

public static final JsonToken VALUE_EMBEDDED_OBJECT

Placeholder token returned when the input source has a concept of embedded Object that are not accessible as usual structure (of starting with START_OBJECT, having values, ending with END_OBJECT), but as "raw" objects.

Note: this token is never returned by regular JSON readers, but only by readers that expose other kinds of source (like JsonNode-based JSON trees, Maps, Lists and such).

从以下版本开始:

1.1

VALUE_STRING

public static final JsonToken VALUE_STRING

VALUE_STRING is returned when a String token is encountered in value context (array element, field value, or root-level stand-alone value)

VALUE_NUMBER_INT

public static final JsonToken VALUE_NUMBER_INT

VALUE_NUMBER_INT is returned when an integer numeric token is encountered in value context: that is, a number that does not have floating point or exponent marker in it (consists only of an optional sign, followed by one or more digits)

VALUE_NUMBER_FLOAT

public static final JsonToken VALUE_NUMBER_FLOAT

VALUE_NUMBER_INT is returned when a numeric token other that is not an integer is encountered: that is, a number that does have floating point or exponent marker in it, in addition to one or more digits.

VALUE_TRUE

public static final JsonToken VALUE_TRUE

VALUE_TRUE is returned when encountering literal "true" in value context

VALUE_FALSE

public static final JsonToken VALUE_FALSE

VALUE_FALSE is returned when encountering literal "false" in value context

VALUE_NULL

public static final JsonToken VALUE_NULL

VALUE_NULL is returned when encountering literal "null" in value context

方法详细资料

values

public static JsonToken[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (JsonToken c : JsonToken.values())
    System.out.println(c);

valueOf

public static JsonToken valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

如果该枚举类型没有带有指定名称的常量, - 则抛出 IllegalArgumentException

如果参数为空值, - 则抛出 NullPointerException

asString

public String asString()

asCharArray

public char[] asCharArray()

asByteArray

public byte[] asByteArray()

isNumeric

public boolean isNumeric()

isScalarValue

public boolean isScalarValue()

Method that can be used to check whether this token represents a valid non-structured value. This means all tokens other than Object/Array start/end markers all field names.