public class Tag extends java.lang.Object implements Tagged, java.util.Map.Entry<java.lang.String,java.lang.String>, java.io.Serializable
It implements the Tagged
interface. However, since instances of this class are immutable,
the modifying methods throw an UnsupportedOperationException
.
Modifier and Type | Field and Description |
---|---|
private java.lang.String |
key |
private static long |
serialVersionUID |
private java.lang.String |
value |
MAX_TAG_LENGTH
Constructor and Description |
---|
Tag()
Create an empty tag whose key and value are empty.
|
Tag(java.lang.String key)
Create a tag whose key is
key and whose value is
empty. |
Tag(java.lang.String key,
java.lang.String value)
Creates a tag for a key and a value.
|
Tag(Tag tag)
Creates clone of the tag
tag . |
Modifier and Type | Method and Description |
---|---|
boolean |
equals(java.lang.Object obj) |
java.lang.String |
get(java.lang.String k)
Replies the value of the given key; null, if there is no value for this key
|
java.lang.String |
getKey()
Replies the key of the tag.
|
java.util.Map<java.lang.String,java.lang.String> |
getKeys()
Replies the map of key/value pairs.
|
java.lang.String |
getValue()
Replies the value of the tag.
|
int |
hashCode() |
boolean |
hasKeys()
Replies true, if there is at least one key/value pair; false, otherwise
|
boolean |
isDirectionKey()
true if this is a direction dependent tag (e.g.
|
java.util.Collection<java.lang.String> |
keySet()
Replies the set of keys
|
boolean |
matchesKey(java.lang.String key)
Replies true if the key of this tag is equal to
key . |
static Tag |
ofString(java.lang.String s)
This constructs a
Tag by splitting s on the first equality sign. |
void |
put(java.lang.String key,
java.lang.String value)
Unsupported.
|
void |
remove(java.lang.String key)
Unsupported.
|
void |
removeAll()
Unsupported.
|
static java.lang.String |
removeWhiteSpaces(java.lang.String s)
Removes leading, trailing, and multiple inner whitespaces from the given string, to be used as a key or value.
|
void |
setKeys(java.util.Map<java.lang.String,java.lang.String> keys)
Unsupported.
|
java.lang.String |
setValue(java.lang.String value)
This is not supported by this implementation.
|
java.lang.String |
toString() |
private static final long serialVersionUID
private final java.lang.String key
private final java.lang.String value
public Tag()
public Tag(java.lang.String key)
key
and whose value is
empty.key
- the key. If null, it is set to the empty key.public Tag(java.lang.String key, java.lang.String value)
key
- the keyvalue
- the valuepublic java.lang.String getKey()
getKey
in interface java.util.Map.Entry<java.lang.String,java.lang.String>
public java.lang.String getValue()
getValue
in interface java.util.Map.Entry<java.lang.String,java.lang.String>
public java.lang.String setValue(java.lang.String value)
setValue
in interface java.util.Map.Entry<java.lang.String,java.lang.String>
value
- ignoredjava.lang.UnsupportedOperationException
- alwayspublic boolean matchesKey(java.lang.String key)
key
.
If key
is null, assumes the empty key.key
- the keykey
public int hashCode()
hashCode
in interface java.util.Map.Entry<java.lang.String,java.lang.String>
hashCode
in class java.lang.Object
public boolean equals(java.lang.Object obj)
equals
in interface java.util.Map.Entry<java.lang.String,java.lang.String>
equals
in class java.lang.Object
public static Tag ofString(java.lang.String s)
Tag
by splitting s
on the first equality sign.s
- the string to convertTextTagParser
public java.lang.String toString()
toString
in class java.lang.Object
public static java.lang.String removeWhiteSpaces(java.lang.String s)
s
- The stringpublic void setKeys(java.util.Map<java.lang.String,java.lang.String> keys)
public java.util.Map<java.lang.String,java.lang.String> getKeys()
Tagged
public void put(java.lang.String key, java.lang.String value)
public java.lang.String get(java.lang.String k)
Tagged
public void remove(java.lang.String key)
public boolean hasKeys()
Tagged
public java.util.Collection<java.lang.String> keySet()
Tagged
public void removeAll()
public boolean isDirectionKey()
true
if this is is a direction dependent tag