Package org.simpleframework.common.parse
Class MapParser<T>
java.lang.Object
org.simpleframework.common.parse.Parser
org.simpleframework.common.parse.MapParser<T>
- All Implemented Interfaces:
Map<T,
T>
- Direct Known Subclasses:
QueryParser
The
MapParser
object represents a parser for name
value pairs. Any parser extending this will typically be parsing
name=value tokens or the like, and inserting these pairs into
the internal map. This type of parser is useful as it exposes all
pairs extracted using the java.util.Map
interface
and as such can be used with the Java collections framework. The
internal map used by this is a Hashtable
, however
subclasses are free to assign a different type to the map used.-
Nested Class Summary
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Field Summary
FieldsModifier and TypeFieldDescriptionRepresents all values inserted to the map as a list of values.Represents the last value inserted into this map instance. -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
clear()
Theclear
method is used to wipe out all the currently existing tokens from the collection.boolean
containsKey
(Object name) This is used to determine whether a token representing the name of a pair has been inserted into the internal map.boolean
containsValue
(Object value) This method is used to determine whether any pair that has been inserted into the internal map had the presented value.entrySet()
This method is used to acquire the name and value pairs that have currently been collected by this parser.Theget
method is used to acquire the value for a named pair.This method is used to acquire aList
for all of the values that have been put in to the map.boolean
isEmpty()
This method is used to determine whether the parser has any tokens available.keySet()
This is used to acquire the names for all the tokens that have currently been collected by this parser.Theput
method is used to insert the name and value provided into the collection of tokens.void
This method is used to insert a collection of tokens into the parsers map.Theremove
method is used to remove the named token pair from the collection of tokens.int
size()
This obviously enough provides the number of tokens that have been inserted into the internal map.values()
This method is used to acquire the value for all tokens that have currently been collected by this parser.Methods inherited from class org.simpleframework.common.parse.Parser
digit, ensureCapacity, init, parse, parse, skip, space, toLower
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface java.util.Map
compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll
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Field Details
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all
Represents all values inserted to the map as a list of values. -
map
Represents the last value inserted into this map instance.
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Constructor Details
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MapParser
protected MapParser()Constructor for theMapParser
object. This is used to create a new parser that makes use of a thread safe map implementation. TheHashMap
is used so that the resulting parser can be accessed in a concurrent environment with the fear of data corruption.
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Method Details
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containsKey
This is used to determine whether a token representing the name of a pair has been inserted into the internal map. The object passed into this method should be a string, as all tokens stored within the map will be stored as strings.- Specified by:
containsKey
in interfaceMap<T,
T> - Parameters:
name
- this is the name of a pair within the map- Returns:
- this returns true if the pair of that name exists
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containsValue
This method is used to determine whether any pair that has been inserted into the internal map had the presented value. If one or more pairs within the collected tokens contains the value provided then this method will return true.- Specified by:
containsValue
in interfaceMap<T,
T> - Parameters:
value
- this is the value that is to be searched for- Returns:
- this returns true if any value is equal to this
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entrySet
This method is used to acquire the name and value pairs that have currently been collected by this parser. This is used to determine which tokens have been extracted from the source. It is useful when the tokens have to be gathered. -
get
Theget
method is used to acquire the value for a named pair. So if a pair of name=value has been parsed and inserted into the collection of tokens this will return the value given the name. The value returned will be a string. -
getAll
This method is used to acquire aList
for all of the values that have been put in to the map. The list allows all values associated with the specified key. This enables a parser to collect a number of associated tokens.- Parameters:
key
- this is the key used to search for the value- Returns:
- this is the list of values associated with the key
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isEmpty
public boolean isEmpty()This method is used to determine whether the parser has any tokens available. If thesize
is zero then the parser is empty and this returns true. The is acts as a proxy the theisEmpty
of the internal map. -
keySet
This is used to acquire the names for all the tokens that have currently been collected by this parser. This is used to determine which tokens have been extracted from the source. It is useful when the tokens have to be gathered. -
put
Theput
method is used to insert the name and value provided into the collection of tokens. Although it is up to the parser to decide what values will be inserted it is generally the case that the inserted tokens will be text. -
putAll
This method is used to insert a collection of tokens into the parsers map. This is used when another source of tokens is required to populate the connection currently maintained within this parsers internal map. Any tokens that currently exist with similar names will be overwritten by this. -
remove
Theremove
method is used to remove the named token pair from the collection of tokens. This acts like a take, in that it will get the token value and remove if from the collection of tokens the parser has stored. -
size
public int size()This obviously enough provides the number of tokens that have been inserted into the internal map. This acts as a proxy method for the internal mapsize
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values
This method is used to acquire the value for all tokens that have currently been collected by this parser. This is used to determine which tokens have been extracted from the source. It is useful when the tokens have to be gathered. -
clear
public void clear()Theclear
method is used to wipe out all the currently existing tokens from the collection. This is used to recycle the parser so that it can be used to parse some other source of tokens without any lingering state.
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