/**
* 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.internal.operators;
import rx.
Observable.
Operator;
import rx.
Subscriber;
import rx.exceptions.
Exceptions;
import rx.functions.*;
/**
* Skips any emitted source items as long as the specified condition holds true. Emits all further source items
* as soon as the condition becomes false.
* @param <T> the value type
*/
public final class
OperatorSkipWhile<T> implements
Operator<T, T> {
final
Func2<? super T,
Integer,
Boolean>
predicate;
public
OperatorSkipWhile(
Func2<? super T,
Integer,
Boolean>
predicate) {
this.
predicate =
predicate;
}
@
Override
public
Subscriber<? super T>
call(final
Subscriber<? super T>
child) {
return new
Subscriber<T>(
child) {
boolean
skipping = true;
int
index;
@
Override
public void
onNext(T
t) {
if (!
skipping) {
child.
onNext(
t);
} else {
boolean
skip;
try {
skip =
predicate.
call(
t,
index++);
} catch (
Throwable e) {
Exceptions.
throwOrReport(
e,
child,
t);
return;
}
if (!
skip) {
skipping = false;
child.
onNext(
t);
} else {
request(1);
}
}
}
@
Override
public void
onError(
Throwable e) {
child.
onError(
e);
}
@
Override
public void
onCompleted() {
child.
onCompleted();
}
};
}
/**
* Convert to Func2 type predicate.
* @param <T> the input value type
* @param predicate the single argument predicate function
* @return The two argument function which ignores its second parameter
*/
public static <T>
Func2<T,
Integer,
Boolean>
toPredicate2(final
Func1<? super T,
Boolean>
predicate) {
return new
Func2<T,
Integer,
Boolean>() {
@
Override
public
Boolean call(T
t1,
Integer t2) {
return
predicate.
call(
t1);
}
};
}
}