Package org.apache.iceberg.common

Class DynFields.Builder

java.lang.Object

org.apache.iceberg.common.DynFields.Builder

Enclosing class:

DynFields

public static class DynFields.Builder
extends Object

Method Summary

Modifier and Type	Method	Description
<T> DynFields.UnboundField<T>	build()	Returns the first valid implementation as a UnboundField or throws a NoSuchFieldException if there is none.
<T> DynFields.BoundField<T>	build(Object target)	Returns the first valid implementation as a BoundMethod or throws a RuntimeException if there is none.
<T> DynFields.UnboundField<T>	buildChecked()	Returns the first valid implementation as a UnboundField or throws a NoSuchFieldException if there is none.
<T> DynFields.BoundField<T>	buildChecked(Object target)	Returns the first valid implementation as a BoundMethod or throws a NoSuchMethodException if there is none.
<T> DynFields.StaticField<T>	buildStatic()	Returns the first valid implementation as a StaticField or throws a RuntimeException if there is none.
DynFields.Builder	defaultAlwaysNull()	Instructs this builder to return AlwaysNull if no implementation is found.
DynFields.Builder	hiddenImpl(Class<?> targetClass, String fieldName)	Checks for a hidden implementation.
DynFields.Builder	hiddenImpl(String className, String fieldName)	Checks for a hidden implementation, first finding the class by name.
DynFields.Builder	impl(Class<?> targetClass, String fieldName)	Checks for an implementation.
DynFields.Builder	impl(String className, String fieldName)	Checks for an implementation, first finding the class by name.
DynFields.Builder	loader(ClassLoader newLoader)	Set the ClassLoader used to lookup classes by name.

Methods inherited from class java.lang.Object

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

Method Details

loader

public DynFields.Builder loader(ClassLoader newLoader)

Set the ClassLoader used to lookup classes by name.

If not set, the current thread's ClassLoader is used.

Parameters:

newLoader - a ClassLoader

Returns:

this Builder for method chaining

defaultAlwaysNull

public DynFields.Builder defaultAlwaysNull()

Instructs this builder to return AlwaysNull if no implementation is found.

Returns:

this Builder for method chaining

impl

public DynFields.Builder impl(String className,
 String fieldName)

Checks for an implementation, first finding the class by name.

Parameters:

className - name of a class

fieldName - name of the field

Returns:

this Builder for method chaining

See Also:

• Class.forName(String)
• Class.getField(String)

impl

public DynFields.Builder impl(Class<?> targetClass,
 String fieldName)

Checks for an implementation.

Parameters:

targetClass - a class instance

fieldName - name of a field (different from constructor)

Returns:

this Builder for method chaining

See Also:

• Class.forName(String)
• Class.getField(String)

hiddenImpl

public DynFields.Builder hiddenImpl(String className,
 String fieldName)

Checks for a hidden implementation, first finding the class by name.

Parameters:

className - name of a class

fieldName - name of a field (different from constructor)

Returns:

this Builder for method chaining

See Also:

• Class.forName(String)
• Class.getField(String)

hiddenImpl

public DynFields.Builder hiddenImpl(Class<?> targetClass,
 String fieldName)

Checks for a hidden implementation.

Parameters:

targetClass - a class instance

fieldName - name of a field (different from constructor)

Returns:

this Builder for method chaining

See Also:

• Class.forName(String)
• Class.getField(String)

buildChecked

public <T> DynFields.UnboundField<T> buildChecked()
                                           throws NoSuchFieldException

Returns the first valid implementation as a UnboundField or throws a NoSuchFieldException if there is none.

Type Parameters:

T - Java class stored in the field

Returns:

a DynFields.UnboundField with a valid implementation

Throws:

NoSuchFieldException - if no implementation was found

buildChecked

public <T> DynFields.BoundField<T> buildChecked(Object target)
                                         throws NoSuchFieldException

Returns the first valid implementation as a BoundMethod or throws a NoSuchMethodException if there is none.

Type Parameters:

T - Java class stored in the field

Parameters:

target - an Object on which to get and set the field

Returns:

a DynFields.BoundField with a valid implementation and target

Throws:

IllegalStateException - if the method is static

IllegalArgumentException - if the receiver's class is incompatible

NoSuchFieldException - if no implementation was found

build

public <T> DynFields.UnboundField<T> build()

Returns the first valid implementation as a UnboundField or throws a NoSuchFieldException if there is none.

Type Parameters:

T - Java class stored in the field

Returns:

a DynFields.UnboundField with a valid implementation

Throws:

RuntimeException - if no implementation was found

build

public <T> DynFields.BoundField<T> build(Object target)

Returns the first valid implementation as a BoundMethod or throws a RuntimeException if there is none.

Type Parameters:

T - Java class stored in the field

Parameters:

target - an Object on which to get and set the field

Returns:

a DynFields.BoundField with a valid implementation and target

Throws:

IllegalStateException - if the method is static

IllegalArgumentException - if the receiver's class is incompatible

RuntimeException - if no implementation was found

buildStatic

public <T> DynFields.StaticField<T> buildStatic()

Returns the first valid implementation as a StaticField or throws a RuntimeException if there is none.

Type Parameters:

T - Java class stored in the field

Returns:

a DynFields.StaticField with a valid implementation

Throws:

IllegalStateException - if the method is not static

RuntimeException - if no implementation was found