Example usage for org.apache.commons.collections4.iterators TransformIterator TransformIterator

Introduction

In this page you can find the example usage for org.apache.commons.collections4.iterators TransformIterator TransformIterator.

Prototype

public TransformIterator(final Iterator<? extends I> iterator) 

Source Link

Document

Constructs a new TransformIterator that won't transform elements from the given iterator.

Usage

From source file:com.github.helenusdriver.driver.impl.PersistedSet.java

/**
 * {@inheritDoc}/*from  w  w  w  .ja  v a  2  s  . c  o  m*/
 *
 * @author paouelle
 *
 * @see java.util.Set#iterator()
 */
@Override
public Iterator<T> iterator() {
    return new TransformIterator<PersistedValue<T, PT>, T>(set.iterator()) {
        @Override
        protected T transform(PersistedValue<T, PT> pv) {
            return pv.getDecodedValue();
        }
    };
}

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From source file:com.github.helenusdriver.driver.impl.PersistedList.java

/**
 * {@inheritDoc}/*  w w w .jav a 2 s  .c  o m*/
 *
 * @author paouelle
 *
 * @see java.util.List#iterator()
 */
@Override
public Iterator<T> iterator() {
    return new TransformIterator<PersistedValue<T, PT>, T>(list.iterator()) {
        @Override
        protected T transform(PersistedValue<T, PT> pv) {
            return pv.getDecodedValue();
        }
    };
}

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From source file:com.github.helenusdriver.driver.impl.PersistedMap.java

/**
 * {@inheritDoc}//from w w  w. ja  v  a 2 s .  com
 *
 * @author paouelle
 *
 * @see java.util.Map#values()
 */
@Override
public Collection<T> values() {
    if (vcol == null) {
        final Collection<PersistedValue<T, PT>> vcol = map.values();

        this.vcol = new AbstractCollection<T>() {
            @Override
            public int size() {
                return vcol.size();
            }

            @Override
            public boolean isEmpty() {
                return vcol.isEmpty();
            }

            @Override
            public Iterator<T> iterator() {
                return new TransformIterator<PersistedValue<T, PT>, T>(vcol.iterator()) {
                    @Override
                    protected T transform(PersistedValue<T, PT> pv) {
                        return pv.getDecodedValue();
                    }
                };
            }

            @Override
            public Stream<T> stream() {
                return vcol.stream().map(pv -> pv.getDecodedValue());
            }

            @Override
            public Stream<T> parallelStream() {
                return vcol.parallelStream().map(pv -> pv.getDecodedValue());
            }

            @Override
            public void clear() {
                vcol.clear();
            }

            @Override
            public String toString() {
                return vcol.toString();
            }
        };
    }
    return vcol;
}

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From source file:com.github.helenusdriver.driver.impl.PersistedMap.java

/**
 * {@inheritDoc}/*from w w  w .ja va  2  s  .  c o  m*/
 *
 * @author paouelle
 *
 * @see java.util.Map#entrySet()
 */
@Override
public Set<Map.Entry<K, T>> entrySet() {
    if (eset == null) {
        final Set<Map.Entry<K, PersistedValue<T, PT>>> eset = map.entrySet();

        this.eset = new AbstractSet<Map.Entry<K, T>>() {
            @Override
            public int size() {
                return eset.size();
            }

            @Override
            public boolean isEmpty() {
                return eset.isEmpty();
            }

            @Override
            public Iterator<Map.Entry<K, T>> iterator() {
                return new TransformIterator<Map.Entry<K, PersistedValue<T, PT>>, Map.Entry<K, T>>(
                        eset.iterator()) {
                    @Override
                    protected Map.Entry<K, T> transform(Map.Entry<K, PersistedValue<T, PT>> me) {
                        return new Entry(me);
                    }
                };
            }

            @Override
            public Stream<Map.Entry<K, T>> stream() {
                return eset.stream().map(me -> new Entry(me));
            }

            @Override
            public Stream<Map.Entry<K, T>> parallelStream() {
                return eset.parallelStream().map(me -> new Entry(me));
            }

            @Override
            public boolean remove(Object o) {
                if (!(o instanceof Map.Entry)) {
                    return false;
                }
                @SuppressWarnings("unchecked")
                final Map.Entry<K, T> me = (Map.Entry<K, T>) o;

                return (map.remove(me.getKey()) != null);
            }

            @Override
            public void clear() {
                eset.clear();
            }

            @Override
            public String toString() {
                return eset.toString();
            }
        };
    }
    return eset;
}

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