gnu.expr
Class Keyword
java.lang.Object
gnu.mapping.Symbol
gnu.expr.Keyword
- All Implemented Interfaces:
- EnvironmentKey, Printable, java.io.Externalizable, java.io.Serializable, java.lang.Comparable
public class Keyword
- extends Symbol
- implements Printable, java.io.Externalizable
- See Also:
- Serialized Form
Method Summary |
static boolean |
isKeyword(java.lang.Object obj)
|
static Keyword |
make(java.lang.String name)
Create or find a Keyword with a given name (without final ':'). |
void |
print(java.io.PrintWriter ps)
|
void |
readExternal(java.io.ObjectInput in)
|
java.lang.Object |
readResolve()
|
static java.lang.Object |
searchForKeyword(java.lang.Object[] vals,
int offset,
java.lang.Object keyword)
Search vals[0:offset-1] for a keyword. |
static java.lang.Object |
searchForKeyword(java.lang.Object[] vals,
int offset,
java.lang.Object keyword,
java.lang.Object dfault)
Search vals[0:offset-1] for a keyword. |
java.lang.String |
toString()
|
void |
writeExternal(java.io.ObjectOutput out)
|
Methods inherited from class gnu.mapping.Symbol |
compareTo, equals, getKeyProperty, getKeySymbol, getLocalName, getName, getNamespace, getNamespaceURI, hasEmptyNamespace, hashCode, make, matches, matches, setNamespace |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
keywordNamespace
public static final Namespace keywordNamespace
Keyword
public Keyword()
make
public static Keyword make(java.lang.String name)
- Create or find a Keyword with a given name (without final ':').
- Parameters:
name
- the print-name of the desired Keyword
- Returns:
- a Keyword with the given name, newly created iff none such exist
isKeyword
public static boolean isKeyword(java.lang.Object obj)
toString
public final java.lang.String toString()
- Overrides:
toString
in class Symbol
print
public void print(java.io.PrintWriter ps)
- Specified by:
print
in interface Printable
- Overrides:
print
in class Symbol
searchForKeyword
public static java.lang.Object searchForKeyword(java.lang.Object[] vals,
int offset,
java.lang.Object keyword)
- Search vals[0:offset-1] for a keyword.
Each key at vals[i] is followed by a value at keys[i+1].
(This is used to search for a keyword parameter in an argument list.)
- Parameters:
vals
- the list to search inoffset
- the index in vals to start the search atkeyword
- the keyword to search for
- Returns:
- vals[i+1] such that vals[i]==keyword (and (i-offset) is even
and non-negative); if there is no such i, return Special.dfault.
searchForKeyword
public static java.lang.Object searchForKeyword(java.lang.Object[] vals,
int offset,
java.lang.Object keyword,
java.lang.Object dfault)
- Search vals[0:offset-1] for a keyword.
Each key at vals[i] is followed by a value at keys[i+1].
(This is used to search for a keyword parameter in an argument list.)
- Parameters:
vals
- the list to search inoffset
- the index in vals to start the search atkeyword
- the keyword to search fordfault
- the value to return if there is no match
- Returns:
- vals[i+1] such that vals[i]==keyword (and (i-offset) is even
and non-negative); if there is no such i, return dfault.
writeExternal
public void writeExternal(java.io.ObjectOutput out)
throws java.io.IOException
- Specified by:
writeExternal
in interface java.io.Externalizable
- Overrides:
writeExternal
in class Symbol
- Throws:
java.io.IOException
readExternal
public void readExternal(java.io.ObjectInput in)
throws java.io.IOException,
java.lang.ClassNotFoundException
- Specified by:
readExternal
in interface java.io.Externalizable
- Overrides:
readExternal
in class Symbol
- Throws:
java.io.IOException
java.lang.ClassNotFoundException
readResolve
public java.lang.Object readResolve()
throws java.io.ObjectStreamException
- Overrides:
readResolve
in class Symbol
- Throws:
java.io.ObjectStreamException