Package org.yaml.snakeyaml.constructor

Class BaseConstructor

java.lang.Object

org.yaml.snakeyaml.constructor.BaseConstructor

Direct Known Subclasses:

SafeConstructor

public abstract class BaseConstructor
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
protected Composer	composer
protected Tag	rootTag
protected Map<Class<? extends Object>,TypeDescription>	typeDefinitions
protected Map<Tag,Class<? extends Object>>	typeTags
protected Map<NodeId,Construct>	yamlClassConstructors	It maps the node kind to the the Construct implementation.
protected Map<Tag,Construct>	yamlConstructors	It maps the (explicit or implicit) tag to the Construct implementation.
protected Map<String,Construct>	yamlMultiConstructors	It maps the (explicit or implicit) tag to the Construct implementation.

Constructor Summary

Constructors

Constructor	Description
BaseConstructor()

Method Summary

Modifier and Type	Method	Description
TypeDescription	addTypeDescription(TypeDescription definition)	Make YAML aware how to parse a custom Class.
boolean	checkData()	Check if more documents available
protected Object	constructArray(SequenceNode node)
protected Object	constructArrayStep2(SequenceNode node, Object array)
protected Object	constructDocument(Node node)	Construct complete YAML document.
protected Map<Object,Object>	constructMapping(MappingNode node)
protected void	constructMapping2ndStep(MappingNode node, Map<Object,Object> mapping)
protected Object	constructObject(Node node)	Construct object from the specified Node.
protected Object	constructObjectNoCheck(Node node)
protected String	constructScalar(ScalarNode node)
protected List<? extends Object>	constructSequence(SequenceNode node)
protected void	constructSequenceStep2(SequenceNode node, Collection<Object> collection)
protected Set<Object>	constructSet(MappingNode node)
protected Set<? extends Object>	constructSet(SequenceNode node)
protected void	constructSet2ndStep(MappingNode node, Set<Object> set)
protected Object	createArray(Class<?> type, int size)
protected List<Object>	createDefaultList(int initSize)
protected Map<Object,Object>	createDefaultMap(int initSize)
protected Set<Object>	createDefaultSet(int initSize)
protected Object	finalizeConstruction(Node node, Object data)
protected Construct	getConstructor(Node node)	Get the constructor to construct the Node.
Object	getData()	Construct and return the next document
PropertyUtils	getPropertyUtils()
Object	getSingleData(Class<?> type)	Ensure that the stream contains a single document and construct it
boolean	isAllowDuplicateKeys()
boolean	isExplicitPropertyUtils()
protected Object	newInstance(Class<?> ancestor, Node node)
protected Object	newInstance(Class<?> ancestor, Node node, boolean tryDefault)
protected Object	newInstance(Node node)
protected List<Object>	newList(SequenceNode node)
protected Map<Object,Object>	newMap(MappingNode node)
protected Set<Object>	newSet(CollectionNode<?> node)
void	setAllowDuplicateKeys(boolean allowDuplicateKeys)
void	setComposer(Composer composer)
void	setPropertyUtils(PropertyUtils propertyUtils)

Methods inherited from class java.lang.Object

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

Field Detail

yamlClassConstructors

protected final Map<NodeId,Construct> yamlClassConstructors

It maps the node kind to the the Construct implementation. When the runtime class is known then the implicit tag is ignored.

yamlConstructors

protected final Map<Tag,Construct> yamlConstructors

It maps the (explicit or implicit) tag to the Construct implementation. It is used: 1) explicit tag - if present. 2) implicit tag - when the runtime class of the instance is unknown (the node has the Object.class)

yamlMultiConstructors

protected final Map<String,Construct> yamlMultiConstructors

It maps the (explicit or implicit) tag to the Construct implementation. It is used when no exact match found.

composer

protected Composer composer

rootTag

protected Tag rootTag

typeDefinitions

protected final Map<Class<? extends Object>,TypeDescription> typeDefinitions

typeTags

protected final Map<Tag,Class<? extends Object>> typeTags

Constructor Detail

BaseConstructor

public BaseConstructor()

Method Detail

setComposer

public void setComposer(Composer composer)

checkData

public boolean checkData()

Check if more documents available

Returns:

true when there are more YAML documents in the stream

getData

public Object getData()

Construct and return the next document

Returns:

constructed instance

getSingleData

public Object getSingleData(Class<?> type)

Ensure that the stream contains a single document and construct it

Parameters:

type - the class of the instance being created

Returns:

constructed instance

Throws:

ComposerException - in case there are more documents in the stream

constructDocument

protected final Object constructDocument(Node node)

Construct complete YAML document. Call the second step in case of recursive structures. At the end cleans all the state.

Parameters:

node - root Node

Returns:

Java instance

constructObject

protected Object constructObject(Node node)

Construct object from the specified Node. Return existing instance if the node is already constructed.

Parameters:

node - Node to be constructed

Returns:

Java instance

constructObjectNoCheck

protected Object constructObjectNoCheck(Node node)

getConstructor

protected Construct getConstructor(Node node)

Get the constructor to construct the Node. For implicit tags if the runtime class is known a dedicated Construct implementation is used. Otherwise the constructor is chosen by the tag.

Parameters:

node - Node to construct an instance from

Returns:

Construct implementation for the specified node

constructScalar

protected String constructScalar(ScalarNode node)

createDefaultList

protected List<Object> createDefaultList(int initSize)

createDefaultSet

protected Set<Object> createDefaultSet(int initSize)

createDefaultMap

protected Map<Object,Object> createDefaultMap(int initSize)

createArray

protected Object createArray(Class<?> type,
                             int size)

finalizeConstruction

protected Object finalizeConstruction(Node node,
                                      Object data)

newInstance

protected Object newInstance(Node node)

newInstance

protected final Object newInstance(Class<?> ancestor,
                                   Node node)
                            throws InstantiationException

Throws:

InstantiationException

newInstance

protected Object newInstance(Class<?> ancestor,
                             Node node,
                             boolean tryDefault)
                      throws InstantiationException

Throws:

InstantiationException

newSet

protected Set<Object> newSet(CollectionNode<?> node)

newList

protected List<Object> newList(SequenceNode node)

newMap

protected Map<Object,Object> newMap(MappingNode node)

constructSequence

protected List<? extends Object> constructSequence(SequenceNode node)

constructSet

protected Set<? extends Object> constructSet(SequenceNode node)

constructArray

protected Object constructArray(SequenceNode node)

constructSequenceStep2

protected void constructSequenceStep2(SequenceNode node,
                                      Collection<Object> collection)

constructArrayStep2

protected Object constructArrayStep2(SequenceNode node,
                                     Object array)

constructSet

protected Set<Object> constructSet(MappingNode node)

constructMapping

protected Map<Object,Object> constructMapping(MappingNode node)

constructMapping2ndStep

protected void constructMapping2ndStep(MappingNode node,
                                       Map<Object,Object> mapping)

constructSet2ndStep

protected void constructSet2ndStep(MappingNode node,
                                   Set<Object> set)

setPropertyUtils

public void setPropertyUtils(PropertyUtils propertyUtils)

getPropertyUtils

public final PropertyUtils getPropertyUtils()

addTypeDescription

public TypeDescription addTypeDescription(TypeDescription definition)

Make YAML aware how to parse a custom Class. If there is no root Class assigned in constructor then the 'root' property of this definition is respected.

Parameters:

definition - to be added to the Constructor

Returns:

the previous value associated with definition, or null if there was no mapping for definition.

isExplicitPropertyUtils

public final boolean isExplicitPropertyUtils()

isAllowDuplicateKeys

public boolean isAllowDuplicateKeys()

setAllowDuplicateKeys

public void setAllowDuplicateKeys(boolean allowDuplicateKeys)