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/**
* Copyright 2014 Netflix, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package rx.functions;
/**
* Utility class for the Action interfaces.
*/
public final class Actions {
private Actions() {
throw new IllegalStateException("No instances!");
}
@SuppressWarnings("unchecked")
public static <T0, T1, T2, T3, T4, T5, T6, T7, T8> EmptyAction<T0, T1, T2, T3, T4, T5, T6, T7, T8> empty() {
return EMPTY_ACTION;
}
@SuppressWarnings("rawtypes")
private static final EmptyAction EMPTY_ACTION = new EmptyAction();
private static final class EmptyAction<T0, T1, T2, T3, T4, T5, T6, T7, T8> implements
Action0,
Action1<T0>,
Action2<T0, T1>,
Action3<T0, T1, T2>,
Action4<T0, T1, T2, T3>,
Action5<T0, T1, T2, T3, T4>,
Action6<T0, T1, T2, T3, T4, T5>,
Action7<T0, T1, T2, T3, T4, T5, T6>,
Action8<T0, T1, T2, T3, T4, T5, T6, T7>,
Action9<T0, T1, T2, T3, T4, T5, T6, T7, T8>,
ActionN {
@Override
public void call() {
}
@Override
public void call(T0 t1) {
}
@Override
public void call(T0 t1, T1 t2) {
}
@Override
public void call(T0 t1, T1 t2, T2 t3) {
}
@Override
public void call(T0 t1, T1 t2, T2 t3, T3 t4) {
}
@Override
public void call(T0 t1, T1 t2, T2 t3, T3 t4, T4 t5) {
}
@Override
public void call(T0 t1, T1 t2, T2 t3, T3 t4, T4 t5, T5 t6) {
}
@Override
public void call(T0 t1, T1 t2, T2 t3, T3 t4, T4 t5, T5 t6, T6 t7) {
}
@Override
public void call(T0 t1, T1 t2, T2 t3, T3 t4, T4 t5, T5 t6, T6 t7, T7 t8) {
}
@Override
public void call(T0 t1, T1 t2, T2 t3, T3 t4, T4 t5, T5 t6, T6 t7, T7 t8, T8 t9) {
}
@Override
public void call(Object... args) {
}
}
/**
* Converts an {@link Action0} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link Action0} to convert
* @return a {@link Func0} that calls {@code action} and returns {@code null}
*/
public static Func0<Void> toFunc(final Action0 action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link Action1} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link Action1} to convert
* @return a {@link Func1} that calls {@code action} and returns {@code null}
*/
public static <T1> Func1<T1, Void> toFunc(final Action1<T1> action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link Action2} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link Action2} to convert
* @return a {@link Func2} that calls {@code action} and returns {@code null}
*/
public static <T1, T2> Func2<T1, T2, Void> toFunc(final Action2<T1, T2> action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link Action3} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link Action3} to convert
* @return a {@link Func3} that calls {@code action} and returns {@code null}
*/
public static <T1, T2, T3> Func3<T1, T2, T3, Void> toFunc(final Action3<T1, T2, T3> action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link Action4} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link Action4} to convert
* @return a {@link Func4} that calls {@code action} and returns {@code null}
*/
public static <T1, T2, T3, T4> Func4<T1, T2, T3, T4, Void> toFunc(final Action4<T1, T2, T3, T4> action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link Action5} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link Action5} to convert
* @return a {@link Func5} that calls {@code action} and returns {@code null}
*/
public static <T1, T2, T3, T4, T5> Func5<T1, T2, T3, T4, T5, Void> toFunc(
final Action5<T1, T2, T3, T4, T5> action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link Action6} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link Action6} to convert
* @return a {@link Func6} that calls {@code action} and returns {@code null}
*/
public static <T1, T2, T3, T4, T5, T6> Func6<T1, T2, T3, T4, T5, T6, Void> toFunc(
final Action6<T1, T2, T3, T4, T5, T6> action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link Action7} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link Action7} to convert
* @return a {@link Func7} that calls {@code action} and returns {@code null}
*/
public static <T1, T2, T3, T4, T5, T6, T7> Func7<T1, T2, T3, T4, T5, T6, T7, Void> toFunc(
final Action7<T1, T2, T3, T4, T5, T6, T7> action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link Action8} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link Action8} to convert
* @return a {@link Func8} that calls {@code action} and returns {@code null}
*/
public static <T1, T2, T3, T4, T5, T6, T7, T8> Func8<T1, T2, T3, T4, T5, T6, T7, T8, Void> toFunc(
final Action8<T1, T2, T3, T4, T5, T6, T7, T8> action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link Action9} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link Action9} to convert
* @return a {@link Func9} that calls {@code action} and returns {@code null}
*/
public static <T1, T2, T3, T4, T5, T6, T7, T8, T9> Func9<T1, T2, T3, T4, T5, T6, T7, T8, T9, Void> toFunc(
final Action9<T1, T2, T3, T4, T5, T6, T7, T8, T9> action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link ActionN} to a function that calls the action and returns {@code null}.
*
* @param action
* the {@link ActionN} to convert
* @return a {@link FuncN} that calls {@code action} and returns {@code null}
*/
public static FuncN<Void> toFunc(
final ActionN action) {
return toFunc(action, (Void) null);
}
/**
* Converts an {@link Action0} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link Action0} to convert
* @param result
* the value to return from the function call
* @return a {@link Func0} that calls {@code action} and returns {@code result}
*/
public static <R> Func0<R> toFunc(final Action0 action, final R result) {
return new Func0<R>() {
@Override
public R call() {
action.call();
return result;
}
};
}
/**
* Converts an {@link Action1} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link Action1} to convert
* @param result
* the value to return from the function call
* @return a {@link Func1} that calls {@code action} and returns {@code result}
*/
public static <T1, R> Func1<T1, R> toFunc(final Action1<T1> action, final R result) {
return new Func1<T1, R>() {
@Override
public R call(T1 t1) {
action.call(t1);
return result;
}
};
}
/**
* Converts an {@link Action2} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link Action2} to convert
* @param result
* the value to return from the function call
* @return a {@link Func2} that calls {@code action} and returns {@code result}
*/
public static <T1, T2, R> Func2<T1, T2, R> toFunc(final Action2<T1, T2> action, final R result) {
return new Func2<T1, T2, R>() {
@Override
public R call(T1 t1, T2 t2) {
action.call(t1, t2);
return result;
}
};
}
/**
* Converts an {@link Action3} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link Action3} to convert
* @param result
* the value to return from the function call
* @return a {@link Func3} that calls {@code action} and returns {@code result}
*/
public static <T1, T2, T3, R> Func3<T1, T2, T3, R> toFunc(final Action3<T1, T2, T3> action, final R result) {
return new Func3<T1, T2, T3, R>() {
@Override
public R call(T1 t1, T2 t2, T3 t3) {
action.call(t1, t2, t3);
return result;
}
};
}
/**
* Converts an {@link Action4} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link Action4} to convert
* @param result
* the value to return from the function call
* @return a {@link Func4} that calls {@code action} and returns {@code result}
*/
public static <T1, T2, T3, T4, R> Func4<T1, T2, T3, T4, R> toFunc(final Action4<T1, T2, T3, T4> action, final R result) {
return new Func4<T1, T2, T3, T4, R>() {
@Override
public R call(T1 t1, T2 t2, T3 t3, T4 t4) {
action.call(t1, t2, t3, t4);
return result;
}
};
}
/**
* Converts an {@link Action5} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link Action5} to convert
* @param result
* the value to return from the function call
* @return a {@link Func5} that calls {@code action} and returns {@code result}
*/
public static <T1, T2, T3, T4, T5, R> Func5<T1, T2, T3, T4, T5, R> toFunc(
final Action5<T1, T2, T3, T4, T5> action, final R result) {
return new Func5<T1, T2, T3, T4, T5, R>() {
@Override
public R call(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5) {
action.call(t1, t2, t3, t4, t5);
return result;
}
};
}
/**
* Converts an {@link Action6} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link Action6} to convert
* @param result
* the value to return from the function call
* @return a {@link Func6} that calls {@code action} and returns {@code result}
*/
public static <T1, T2, T3, T4, T5, T6, R> Func6<T1, T2, T3, T4, T5, T6, R> toFunc(
final Action6<T1, T2, T3, T4, T5, T6> action, final R result) {
return new Func6<T1, T2, T3, T4, T5, T6, R>() {
@Override
public R call(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6) {
action.call(t1, t2, t3, t4, t5, t6);
return result;
}
};
}
/**
* Converts an {@link Action7} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link Action7} to convert
* @param result
* the value to return from the function call
* @return a {@link Func7} that calls {@code action} and returns {@code result}
*/
public static <T1, T2, T3, T4, T5, T6, T7, R> Func7<T1, T2, T3, T4, T5, T6, T7, R> toFunc(
final Action7<T1, T2, T3, T4, T5, T6, T7> action, final R result) {
return new Func7<T1, T2, T3, T4, T5, T6, T7, R>() {
@Override
public R call(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7) {
action.call(t1, t2, t3, t4, t5, t6, t7);
return result;
}
};
}
/**
* Converts an {@link Action8} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link Action8} to convert
* @param result
* the value to return from the function call
* @return a {@link Func8} that calls {@code action} and returns {@code result}
*/
public static <T1, T2, T3, T4, T5, T6, T7, T8, R> Func8<T1, T2, T3, T4, T5, T6, T7, T8, R> toFunc(
final Action8<T1, T2, T3, T4, T5, T6, T7, T8> action, final R result) {
return new Func8<T1, T2, T3, T4, T5, T6, T7, T8, R>() {
@Override
public R call(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8) {
action.call(t1, t2, t3, t4, t5, t6, t7, t8);
return result;
}
};
}
/**
* Converts an {@link Action9} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link Action9} to convert
* @param result
* the value to return from the function call
* @return a {@link Func9} that calls {@code action} and returns {@code result}
*/
public static <T1, T2, T3, T4, T5, T6, T7, T8, T9, R> Func9<T1, T2, T3, T4, T5, T6, T7, T8, T9, R> toFunc(
final Action9<T1, T2, T3, T4, T5, T6, T7, T8, T9> action, final R result) {
return new Func9<T1, T2, T3, T4, T5, T6, T7, T8, T9, R>() {
@Override
public R call(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9) {
action.call(t1, t2, t3, t4, t5, t6, t7, t8, t9);
return result;
}
};
}
/**
* Converts an {@link ActionN} to a function that calls the action and returns a specified value.
*
* @param action
* the {@link ActionN} to convert
* @param result
* the value to return from the function call
* @return a {@link FuncN} that calls {@code action} and returns {@code result}
*/
public static <R> FuncN<R> toFunc(
final ActionN action, final R result) {
return new FuncN<R>() {
@Override
public R call(Object... args) {
action.call(args);
return result;
}
};
}
}
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