Package com.gengoai.parsing

Class ValueExpression

java.lang.Object

com.gengoai.parsing.BaseExpression

com.gengoai.parsing.ValueExpression

All Implemented Interfaces:

Expression, Serializable

public class ValueExpression
extends BaseExpression

Generic value expression in which the value is stored using a Val to support arbitrary types.

Author:

David B. Bracewell

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static PrefixHandler	BOOLEAN_HANDLER	Creates a boolean value handler which will parse the ParserToken text to generate the boolean value
static PrefixHandler	NULL_HANDLER	Creates a null value handler which will always contain a null value
static PrefixHandler	NUMERIC_HANDLER	Creates a numeric value handler which will parse the ParserToken text using Double.parseDouble to generate the numeric value
static PrefixHandler	STRING_HANDLER	Creates a string value handler which will use the text of the ParserToken as the value

Constructor Summary

Constructors

Constructor	Description
ValueExpression(Tag type, Object value)	Instantiates a new Value expression.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
Val	getValue()	Gets the stored value
<T> T	getValue(Class<T> tClass)	Gets the value as the given type
static PrefixHandler	handler(SerializableFunction<ParserToken,Object> converter)	Creates a generic handler which uses the given SerializableFunction to convert the ParserToken to a value.
int	hashCode()
String	toString()

Methods inherited from class com.gengoai.parsing.BaseExpression

getType

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.gengoai.parsing.Expression

apply, as, isInstance, isInstance, isInstance, when, when

Field Detail

BOOLEAN_HANDLER

public static final PrefixHandler BOOLEAN_HANDLER

Creates a boolean value handler which will parse the ParserToken text to generate the boolean value

NULL_HANDLER

public static final PrefixHandler NULL_HANDLER

Creates a null value handler which will always contain a null value

NUMERIC_HANDLER

public static final PrefixHandler NUMERIC_HANDLER

Creates a numeric value handler which will parse the ParserToken text using Double.parseDouble to generate the numeric value

STRING_HANDLER

public static final PrefixHandler STRING_HANDLER

Creates a string value handler which will use the text of the ParserToken as the value

Constructor Detail

ValueExpression

public ValueExpression(Tag type,
                       Object value)

Instantiates a new Value expression.

Parameters:

type - the type

value - the value

Method Detail

handler

public static PrefixHandler handler(SerializableFunction<ParserToken,Object> converter)

Creates a generic handler which uses the given SerializableFunction to convert the ParserToken to a value.

Parameters:

converter - the converter to convert the token into a value.

Returns:

the prefix handler

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

getValue

public Val getValue()

Gets the stored value

Returns:

the value

getValue

public <T> T getValue(Class<T> tClass)

Gets the value as the given type

Type Parameters:

T - the type parameter

Parameters:

tClass - the class information of the type to return

Returns:

the value

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object