Package com.amihaiemil.eoyaml

Class EmptyYamlMapping

java.lang.Object

com.amihaiemil.eoyaml.BaseYamlMapping

com.amihaiemil.eoyaml.EmptyYamlMapping

All Implemented Interfaces:

YamlMapping, YamlNode, Comparable<YamlNode>

public class EmptyYamlMapping
extends BaseYamlMapping

Representation of an empty YAML Mapping (or "{}"). A decorator around YamlMapping with no keys.

Since:

5.1.17

Version:

$Id: a59c837ee6cdffc821d6bf0707c179914e588670 $

Author:

Andrew Newman

Constructor Summary

Constructors

Constructor	Description
EmptyYamlMapping(YamlMapping mapping)	Wrap an existing mapping - expects comments() to be implemented.

Method Summary

Modifier and Type	Method	Description
<T extends YamlNode> T	asClass(Class<T> clazz, Node type)	Gives the YamlNode instance from node class and node type.
YamlMapping	asMapping()	Gives a Mapping value of the node.
Scalar	asScalar()	Gives a String value of the node.
YamlSequence	asSequence()	Gives a Sequence value of the node.
YamlStream	asStream()	Gives a Stream value of the node.
Comment	comment()	Comment referring to this Node.
Set<YamlNode>	keys()	Return the keys' set of this mapping.
String	toString()	Print this YamlNode using a StringWriter to create its String representation.
YamlNode	value(YamlNode key)	Get the YamlNode mapped to the specified key.

Methods inherited from class com.amihaiemil.eoyaml.BaseYamlMapping

compareTo, equals, hashCode, isEmpty, type

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.amihaiemil.eoyaml.YamlMapping

date, date, dateTime, dateTime, doubleNumber, doubleNumber, floatNumber, floatNumber, foldedBlockScalar, foldedBlockScalar, integer, integer, literalBlockScalar, literalBlockScalar, longNumber, longNumber, string, string, value, values, yamlMapping, yamlMapping, yamlSequence, yamlSequence

Methods inherited from interface com.amihaiemil.eoyaml.YamlNode

asClass, asMapping, asScalar, asSequence, asStream

Constructor Detail

EmptyYamlMapping

public EmptyYamlMapping(YamlMapping mapping)

Wrap an existing mapping - expects comments() to be implemented.

Parameters:

mapping - The mapping to wrap.

Method Detail

keys

public final Set<YamlNode> keys()

Description copied from interface: YamlMapping

Return the keys' set of this mapping.

Returns:

Set of YamlNode keys.

value

public final YamlNode value(YamlNode key)

Description copied from interface: YamlMapping

Get the YamlNode mapped to the specified key.

Parameters:

key - YamlNode key. Could be a simple scalar, a YamlMapping or a YamlSequence.

Returns:

The found YamlNode or null if nothing is found.

comment

public final Comment comment()

Description copied from interface: YamlNode

Comment referring to this Node.

Returns:

Comment. If there is no comment, it will return an "empty" comment (an instance of Comment with empty-string value()).

asScalar

public final Scalar asScalar()
                      throws YamlReadingException,
                             ClassCastException

Description copied from interface: YamlNode

Gives a String value of the node.

Specified by:

asScalar in interface YamlNode

Returns:

String value of the node.

Throws:

YamlReadingException - If the node type is not Scalar.

ClassCastException - If the node type couldn't defined correctly.

asMapping

public final YamlMapping asMapping()
                            throws YamlReadingException,
                                   ClassCastException

Description copied from interface: YamlNode

Gives a Mapping value of the node.

Specified by:

asMapping in interface YamlNode

Returns:

Mapping value of the node.

Throws:

YamlReadingException - If the node type is not Mapping.

ClassCastException - If the node type couldn't defined correctly.

asSequence

public final YamlSequence asSequence()
                              throws YamlReadingException,
                                     ClassCastException

Description copied from interface: YamlNode

Gives a Sequence value of the node.

Specified by:

asSequence in interface YamlNode

Returns:

Sequence value of the node.

Throws:

YamlReadingException - If the node type is not Sequence.

ClassCastException - If the node type couldn't defined correctly.

asStream

public final YamlStream asStream()
                          throws YamlReadingException,
                                 ClassCastException

Description copied from interface: YamlNode

Gives a Stream value of the node.

Specified by:

asStream in interface YamlNode

Returns:

Stream value of the node.

Throws:

YamlReadingException - If the node type is not Stream.

ClassCastException - If the node type couldn't defined correctly.

asClass

public final <T extends YamlNode> T asClass(Class<T> clazz,
                                            Node type)
                                     throws YamlReadingException,
                                            ClassCastException

Description copied from interface: YamlNode

Gives the YamlNode instance from node class and node type.

Specified by:

asClass in interface YamlNode

Type Parameters:

T - Requested a YamlNode class instance.

Parameters:

clazz - Requested a YamlNode class.

type - Requested a Node.

Returns:

Requested a YamlNode.

Throws:

YamlReadingException - If the type is not a YamlNode.

ClassCastException - If the node type couldn't defined correctly.

toString

public final String toString()

Print this YamlNode using a StringWriter to create its String representation.

Overrides:

toString in class Object

Returns:

String print of this YamlNode.

Throws:

YamlPrintException - If there is any I/O problem when printing the YAML.