Package ratpack.util
Class Types
- java.lang.Object
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- ratpack.util.Types
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public abstract class Types extends java.lang.Object
Static utility methods for dealing with types.
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Method Summary
All Methods Static Methods Concrete Methods Deprecated Methods Modifier and Type Method Description static <T> T
cast(java.lang.Object o)
Simply casts the argument toT
.static <T> com.google.common.reflect.TypeToken<T>
intern(com.google.common.reflect.TypeToken<T> typeToken)
Intern the given type token.static <T> com.google.common.reflect.TypeToken<java.util.List<T>>
listOf(java.lang.Class<T> type)
Creates a type token for a list of of the given type.static <T> com.google.common.reflect.TypeToken<Promise<T>>
promiseOf(com.google.common.reflect.TypeToken<T> type)
Deprecated.since 1.5, no replacement.static <T> com.google.common.reflect.TypeToken<Promise<T>>
promiseOf(java.lang.Class<T> type)
Deprecated.since 1.5, no replacement.static <T> com.google.common.reflect.TypeToken<T>
token(java.lang.Class<T> clazz)
Create a type token for the given class.static com.google.common.reflect.TypeToken<?>
token(java.lang.reflect.Type type)
Create a type token for the given runtime type.
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Method Detail
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cast
public static <T> T cast(java.lang.Object o)
Simply casts the argument toT
.This method will throw
ClassCastException
ifo
is not compatible withT
.- Type Parameters:
T
- the target type- Parameters:
o
- the object to cast- Returns:
- the input object cast to the target type
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token
public static com.google.common.reflect.TypeToken<?> token(java.lang.reflect.Type type)
Create a type token for the given runtime type. This method should be preferred overTypeToken.of(Type)
as the result may be interned when not in development.- Parameters:
type
- the type- Returns:
- a type token for the given type
- Since:
- 1.1
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token
public static <T> com.google.common.reflect.TypeToken<T> token(java.lang.Class<T> clazz)
Create a type token for the given class. This method should be preferred overTypeToken.of(Class)
as the result may be interned when not in development.- Type Parameters:
T
- the type- Parameters:
clazz
- the class- Returns:
- a type token for the given class
- Since:
- 1.1
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intern
public static <T> com.google.common.reflect.TypeToken<T> intern(com.google.common.reflect.TypeToken<T> typeToken)
Intern the given type token.- Type Parameters:
T
- the type- Parameters:
typeToken
- the type token to intern- Returns:
- the given type token interned
- Since:
- 1.5
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listOf
public static <T> com.google.common.reflect.TypeToken<java.util.List<T>> listOf(java.lang.Class<T> type)
Creates a type token for a list of of the given type.import ratpack.util.Types; import com.google.common.reflect.TypeToken; import java.util.List; import static org.junit.Assert.*; public class Example { public static void main(String... args) { assertEquals(Types.listOf(String.class), new TypeToken<List<String>>() {}); } }
- Type Parameters:
T
- the list element type- Parameters:
type
- the list element type- Returns:
- a type token for a list of of the given type.
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promiseOf
@Deprecated public static <T> com.google.common.reflect.TypeToken<Promise<T>> promiseOf(java.lang.Class<T> type)
Deprecated.since 1.5, no replacement.Creates a type token for a promise of of the given type.import ratpack.util.Types; import ratpack.exec.Promise; import com.google.common.reflect.TypeToken; import java.util.List; import static org.junit.Assert.*; public class Example { @SuppressWarnings("deprecation") public static void main(String... args) { assertEquals(Types.promiseOf(String.class), new TypeToken<Promise<String>>() {}); } }
- Type Parameters:
T
- the promise element type- Parameters:
type
- the promise element type- Returns:
- a type token for a promise of of the given type.
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promiseOf
@Deprecated public static <T> com.google.common.reflect.TypeToken<Promise<T>> promiseOf(com.google.common.reflect.TypeToken<T> type)
Deprecated.since 1.5, no replacement.Creates a type token for a promise of the given type.import ratpack.util.Types; import ratpack.exec.Promise; import com.google.common.reflect.TypeToken; import java.util.List; import static org.junit.Assert.*; public class Example { @SuppressWarnings("deprecation") public static void main(String... args) { assertEquals( Types.promiseOf(new TypeToken<List<String>>() {}), new TypeToken<Promise<List<String>>>() {} ); } }
- Type Parameters:
T
- the promise element type- Parameters:
type
- the promise element type- Returns:
- a type token for a promise of of the given type.
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