java.lang.Object
- com.google.gson.internal.ConstructorConstructor

```
public final class ConstructorConstructor
extends java.lang.Object
```
Returns a function that can construct an instance of a requested type.

Field Summary

Fields
Modifier and Type	Field	Description
`private java.util.Map<java.lang.reflect.Type,InstanceCreator<?>>`	`instanceCreators`
`private java.util.List<ReflectionAccessFilter>`	`reflectionFilters`
`private boolean`	`useJdkUnsafe`

Constructor Summary

Constructors
Constructor	Description
`ConstructorConstructor(java.util.Map<java.lang.reflect.Type,InstanceCreator<?>> instanceCreators, boolean useJdkUnsafe, java.util.List<ReflectionAccessFilter> reflectionFilters)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) static java.lang.String`	`checkInstantiable(java.lang.Class<?> c)`	Check if the class can be instantiated by Unsafe allocator.
`<T> ObjectConstructor<T>`	`get(TypeToken<T> typeToken)`	Calls `get(TypeToken, boolean)`, and allows usage of JDK Unsafe.
`<T> ObjectConstructor<T>`	`get(TypeToken<T> typeToken, boolean allowUnsafe)`	Retrieves an object constructor for the given type.
`private static boolean`	`hasStringKeyType(java.lang.reflect.Type mapType)`
`private static ObjectConstructor<? extends java.util.Collection<? extends java.lang.Object>>`	`newCollectionConstructor(java.lang.Class<?> rawType)`
`private static <T> ObjectConstructor<T>`	`newDefaultConstructor(java.lang.Class<? super T> rawType, ReflectionAccessFilter.FilterResult filterResult)`
`private static <T> ObjectConstructor<T>`	`newDefaultImplementationConstructor(java.lang.reflect.Type type, java.lang.Class<? super T> rawType)`	Constructors for common interface types like Map and List and their subtypes.
`private static ObjectConstructor<? extends java.util.Map<? extends java.lang.Object,java.lang.Object>>`	`newMapConstructor(java.lang.reflect.Type type, java.lang.Class<?> rawType)`
`private static <T> ObjectConstructor<T>`	`newSpecialCollectionConstructor(java.lang.reflect.Type type, java.lang.Class<? super T> rawType)`	Creates constructors for special JDK collection types which do not have a public no-args constructor.
`private <T> ObjectConstructor<T>`	`newUnsafeAllocator(java.lang.Class<? super T> rawType)`
`java.lang.String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

instanceCreators

private final java.util.Map<java.lang.reflect.Type,InstanceCreator<?>> instanceCreators

useJdkUnsafe
```
private final boolean useJdkUnsafe
```

reflectionFilters

private final java.util.List<ReflectionAccessFilter> reflectionFilters

Constructor Detail

ConstructorConstructor

public ConstructorConstructor(java.util.Map<java.lang.reflect.Type,InstanceCreator<?>> instanceCreators,
                              boolean useJdkUnsafe,
                              java.util.List<ReflectionAccessFilter> reflectionFilters)

Method Detail

checkInstantiable
```
static java.lang.String checkInstantiable(java.lang.Class<?> c)
```
Check if the class can be instantiated by Unsafe allocator. If the instance has interface or abstract modifiers return an exception message.

Parameters:

c - instance of the class to be checked

Returns:

if instantiable null, else a non-null exception message

get

public <T> ObjectConstructor<T> get(TypeToken<T> typeToken)

Calls get(TypeToken, boolean), and allows usage of JDK Unsafe.

get
```
public <T> ObjectConstructor<T> get(TypeToken<T> typeToken,
                                    boolean allowUnsafe)
```
Retrieves an object constructor for the given type.

Parameters:

typeToken - type for which a constructor should be retrieved

allowUnsafe - whether to allow usage of JDK Unsafe; has no effect if useJdkUnsafe is false

newSpecialCollectionConstructor

private static <T> ObjectConstructor<T> newSpecialCollectionConstructor(java.lang.reflect.Type type,
                                                                        java.lang.Class<? super T> rawType)

Creates constructors for special JDK collection types which do not have a public no-args constructor.

newDefaultConstructor

private static <T> ObjectConstructor<T> newDefaultConstructor(java.lang.Class<? super T> rawType,
                                                              ReflectionAccessFilter.FilterResult filterResult)

newDefaultImplementationConstructor

private static <T> ObjectConstructor<T> newDefaultImplementationConstructor(java.lang.reflect.Type type,
                                                                            java.lang.Class<? super T> rawType)

Constructors for common interface types like Map and List and their subtypes.

newCollectionConstructor

private static ObjectConstructor<? extends java.util.Collection<? extends java.lang.Object>> newCollectionConstructor(java.lang.Class<?> rawType)

hasStringKeyType

private static boolean hasStringKeyType(java.lang.reflect.Type mapType)

newMapConstructor

private static ObjectConstructor<? extends java.util.Map<? extends java.lang.Object,java.lang.Object>> newMapConstructor(java.lang.reflect.Type type,
                                                                                                                               java.lang.Class<?> rawType)

newUnsafeAllocator

private <T> ObjectConstructor<T> newUnsafeAllocator(java.lang.Class<? super T> rawType)

toString
```
public java.lang.String toString()
```
Overrides:

toString in class java.lang.Object

Class ConstructorConstructor