org.apache.velocity.util
Class DuckType

java.lang.Object
  org.apache.velocity.util.DuckType

public class DuckType
extends Object

Support for getAs() convention for rendering (String), evaluating (Boolean) or doing math with (Number) references.

Since:

2.0

Author:

Nathan Bubna

Nested Class Summary

protected static class

DuckType.Types

Field Summary

protected static Object

NO_METHOD

Constructor Summary

DuckType()

Method Summary

static boolean	asBoolean(Object value)
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)
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

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)

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)