org.codehaus.jackson.node

类 BaseJsonNode

java.lang.Object

org.codehaus.jackson.JsonNode

org.codehaus.jackson.node.BaseJsonNode

所有已实现的接口:

Iterable<JsonNode>, JsonSerializable, JsonSerializableWithType

直接已知子类:

ContainerNode, MissingNode, ValueNode

public abstract class BaseJsonNode
extends JsonNode
implements JsonSerializableWithType

Abstract base class common to all standard JsonNode implementations. The main addition here is that we declare that sub-classes must implement JsonSerializableWithType. This simplifies object mapping aspects a bit, as no external serializers are needed.

字段概要

从类继承的字段 org.codehaus.jackson.JsonNode

NO_NODES, NO_STRINGS

构造器概要

构造器

限定符	构造器和说明
protected	BaseJsonNode()

方法概要

方法

限定符和类型	方法和说明
abstract JsonToken	asToken() Method that can be used for efficient type detection when using stream abstraction for traversing nodes.
ObjectNode	findParent(String fieldName) Method for finding a JSON Object that contains specified field, within this node or its descendants.
List<JsonNode>	findParents(String fieldName, List<JsonNode> foundSoFar)
JsonNode	findPath(String fieldName) Method similar to JsonNode.findValue(java.lang.String), but that will return a "missing node" instead of null if no field is found.
JsonNode	findValue(String fieldName) Method for finding a JSON Object field with specified name in this node or its child nodes, and returning value it has.
List<JsonNode>	findValues(String fieldName, List<JsonNode> foundSoFar)
List<String>	findValuesAsText(String fieldName, List<String> foundSoFar)
JsonParser.NumberType	getNumberType() If this node is a numeric type (as per JsonNode.isNumber()), returns native type that node uses to store the numeric value.
abstract void	serialize(JsonGenerator jgen, SerializerProvider provider) Method called to serialize node instances using given generator.
abstract void	serializeWithType(JsonGenerator jgen, SerializerProvider provider, TypeSerializer typeSer) Type information is needed, even if JsonNode instances are "plain" JSON, since they may be mixed with other types.
JsonParser	traverse() Method for constructing a JsonParser instance for iterating over contents of the tree that this node is root of.

从类继承的方法 org.codehaus.jackson.JsonNode

asBoolean, asBoolean, asDouble, asDouble, asInt, asInt, asLong, asLong, asText, equals, findParents, findValues, findValuesAsText, get, get, getBigIntegerValue, getBinaryValue, getBooleanValue, getDecimalValue, getDoubleValue, getElements, getFieldNames, getFields, getIntValue, getLongValue, getNumberValue, getPath, getPath, getTextValue, getValueAsBoolean, getValueAsBoolean, getValueAsDouble, getValueAsDouble, getValueAsInt, getValueAsInt, getValueAsLong, getValueAsLong, getValueAsText, has, has, isArray, isBigDecimal, isBigInteger, isBinary, isBoolean, isContainerNode, isDouble, isFloatingPointNumber, isInt, isIntegralNumber, isLong, isMissingNode, isNull, isNumber, isObject, isPojo, isTextual, isValueNode, iterator, path, path, size, toString, with

从类继承的方法 java.lang.Object

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

构造器详细资料

BaseJsonNode

protected BaseJsonNode()

方法详细资料

findValue

public JsonNode findValue(String fieldName)

从类复制的说明: JsonNode

Method for finding a JSON Object field with specified name in this node or its child nodes, and returning value it has. If no matching field is found in this node or its descendants, returns null.

指定者:

findValue 在类中 JsonNode

参数:

fieldName - Name of field to look for

返回:

Value of first matching node found, if any; null if none

findPath

public final JsonNode findPath(String fieldName)

从类复制的说明: JsonNode

Method similar to JsonNode.findValue(java.lang.String), but that will return a "missing node" instead of null if no field is found. Missing node is a specific kind of node for which JsonNode.isMissingNode() returns true; and all value access methods return empty or missing value.

指定者:

findPath 在类中 JsonNode

参数:

fieldName - Name of field to look for

返回:

Value of first matching node found; or if not found, a "missing node" (non-null instance that has no value)

findParent

public ObjectNode findParent(String fieldName)

从类复制的说明: JsonNode

Method for finding a JSON Object that contains specified field, within this node or its descendants. If no matching field is found in this node or its descendants, returns null.

指定者:

findParent 在类中 JsonNode

参数:

fieldName - Name of field to look for

返回:

Value of first matching node found, if any; null if none

findValues

public List<JsonNode> findValues(String fieldName,
                        List<JsonNode> foundSoFar)

指定者:

findValues 在类中 JsonNode

findValuesAsText

public List<String> findValuesAsText(String fieldName,
                            List<String> foundSoFar)

指定者:

findValuesAsText 在类中 JsonNode

findParents

public List<JsonNode> findParents(String fieldName,
                         List<JsonNode> foundSoFar)

指定者:

findParents 在类中 JsonNode

traverse

public JsonParser traverse()

从类复制的说明: JsonNode

Method for constructing a JsonParser instance for iterating over contents of the tree that this node is root of. Functionally equivalent to first serializing tree using ObjectCodec and then re-parsing but more efficient.

指定者:

traverse 在类中 JsonNode

asToken

public abstract JsonToken asToken()

Method that can be used for efficient type detection when using stream abstraction for traversing nodes. Will return the first JsonToken that equivalent stream event would produce (for most nodes there is just one token but for structured/container types multiple)

指定者:

asToken 在类中 JsonNode

从以下版本开始:

1.3

getNumberType

public JsonParser.NumberType getNumberType()

从类复制的说明: JsonNode

If this node is a numeric type (as per JsonNode.isNumber()), returns native type that node uses to store the numeric value.

指定者:

getNumberType 在类中 JsonNode

从以下版本开始:

1.3

serialize

public abstract void serialize(JsonGenerator jgen,
             SerializerProvider provider)
                        throws IOException,
                               JsonProcessingException

Method called to serialize node instances using given generator.

指定者:

serialize 在接口中 JsonSerializable

抛出:

IOException

JsonProcessingException

serializeWithType

public abstract void serializeWithType(JsonGenerator jgen,
                     SerializerProvider provider,
                     TypeSerializer typeSer)
                                throws IOException,
                                       JsonProcessingException

Type information is needed, even if JsonNode instances are "plain" JSON, since they may be mixed with other types.

指定者:

serializeWithType 在接口中 JsonSerializableWithType

抛出:

IOException

JsonProcessingException