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ixjava developed by David Karnok
There is a newer version: 1.0.0
/*
 * Copyright 2011-2016 David Karnok
 *
 * 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 ix.internal.operators;

import ix.internal.util.SingleContainer;

import java.util.Iterator;
import java.util.NoSuchElementException;

import rx.exceptions.Exceptions;
import rx.functions.Func1;

public final class OnErrorResumeNextIterable implements
		Iterable {
	/** The source sequence. */
	private final Iterable source;
	private final Func1> handler;

	public OnErrorResumeNextIterable(
			Iterable source,
			Func1> handler) {
		this.source = source;
		this.handler = handler;
	}

	@Override
	public Iterator iterator() {
	    return new Iterator() {
	        /** The current iterator. */
	        Iterator it = source.iterator();
	        /** The last iterator used by next(). */
	        Iterator itForRemove;
	        /** The peek ahead container. */
	        final SingleContainer peek = new SingleContainer();
	        /** Indicate that we switched to the handler. */
	        boolean usingHandler;
	        @Override
	        public boolean hasNext() {
	            if (peek.isEmpty()) {
	                while (!Thread.currentThread().isInterrupted()) {
	                    try {
	                        if (it.hasNext()) {
	                            itForRemove = it;
	                            peek.add(it.next());
	                        }
	                        break;
	                    } catch (Throwable t) {
	                        if (!usingHandler) {
	                            Interactive.unsubscribe(it);
	                            it = handler.call(t).iterator();
	                            usingHandler = true;
	                        } else {
	                            Exceptions.propagate(t);
	                        }
	                    }
	                }
	            }
	            return !peek.isEmpty();
	        }
	        
	        @Override
	        public T next() {
	            if (hasNext()) {
	                return peek.take();
	            }
	            throw new NoSuchElementException();
	        }
	        
	        @Override
	        public void remove() {
	            if (itForRemove == null) {
	                throw new IllegalStateException();
	            }
	            itForRemove.remove();
	            itForRemove = null;
	        }
	        
	    };
	}
}