Package org.apache.velocity.util

Class DuckType

java.lang.Object

org.apache.velocity.util.DuckType

public class DuckType
extends Object

Support for getAs<java.lang.reflect.Type>() convention for rendering (String), evaluating (Boolean) or doing math with (Number) references.

Since:

2.0

Author:

Nathan Bubna

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	DuckType.Types

Field Summary

Fields

Modifier and Type	Field	Description
protected static Object	NO_METHOD

Constructor Summary

Constructors

Constructor	Description
DuckType()

Method Summary

Modifier and Type	Method	Description
static boolean	asBoolean(Object value, boolean coerceType)
static boolean	asEmpty(Object value)
static boolean	asNull(Object value)
static Number	asNumber(Object value)
static Number	asNumber(Object value, boolean coerceType)
static String	asString(Object value)
static String	asString(Object value, boolean coerceType)
static void	clearCache()	Clears the internal cache of all the underlying Types.
protected static Method	findMethod(Class<?> c, DuckType.Types type)
protected static Object	get(Object value, DuckType.Types type)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NO_METHOD

protected static final Object NO_METHOD

Constructor Detail

DuckType

public DuckType()

Method Detail

clearCache

public static void clearCache()

Clears the internal cache of all the underlying Types.

asString

public static String asString(Object value)

asString

public static String asString(Object value,
                              boolean coerceType)

asNull

public static boolean asNull(Object value)

asBoolean

public static boolean asBoolean(Object value,
                                boolean coerceType)

asEmpty

public static boolean asEmpty(Object value)

asNumber

public static Number asNumber(Object value)

asNumber

public static Number asNumber(Object value,
                              boolean coerceType)

get

protected static Object get(Object value,
                            DuckType.Types type)

findMethod

protected static Method findMethod(Class<?> c,
                                   DuckType.Types type)