Issue Fix #1779

OsmAnd-java/src/com/googlecode/concurrentlinkedhashmap/EntryWeigher.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2012 Google Inc. All Rights Reserved.
+ *
+ * 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 com.googlecode.concurrentlinkedhashmap;
+
+/**
+ * A class that can determine the weight of an entry. The total weight threshold
+ * is used to determine when an eviction is required.
+ *
+ * @author ben.manes@gmail.com (Ben Manes)
+ * @see <a href="http://code.google.com/p/concurrentlinkedhashmap/">
+ *      http://code.google.com/p/concurrentlinkedhashmap/</a>
+ */
+public interface EntryWeigher<K, V> {
+
+  /**
+   * Measures an entry's weight to determine how many units of capacity that
+   * the key and value consumes. An entry must consume a minimum of one unit.
+   *
+   * @param key the key to weigh
+   * @param value the value to weigh
+   * @return the entry's weight
+   */
+  int weightOf(K key, V value);
+}

OsmAnd-java/src/com/googlecode/concurrentlinkedhashmap/EvictionListener.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010 Google Inc. All Rights Reserved.
+ *
+ * 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 com.googlecode.concurrentlinkedhashmap;
+
+/**
+ * A listener registered for notification when an entry is evicted. An instance
+ * may be called concurrently by multiple threads to process entries. An
+ * implementation should avoid performing blocking calls or synchronizing on
+ * shared resources.
+ * <p>
+ * The listener is invoked by {@link ConcurrentLinkedHashMap} on a caller's
+ * thread and will not block other threads from operating on the map. An
+ * implementation should be aware that the caller's thread will not expect
+ * long execution times or failures as a side effect of the listener being
+ * notified. Execution safety and a fast turn around time can be achieved by
+ * performing the operation asynchronously, such as by submitting a task to an
+ * {@link java.util.concurrent.ExecutorService}.
+ *
+ * @author ben.manes@gmail.com (Ben Manes)
+ * @see <a href="http://code.google.com/p/concurrentlinkedhashmap/">
+ *      http://code.google.com/p/concurrentlinkedhashmap/</a>
+ */
+public interface EvictionListener<K, V> {
+
+  /**
+   * A call-back notification that the entry was evicted.
+   *
+   * @param key the entry's key
+   * @param value the entry's value
+   */
+  void onEviction(K key, V value);
+}

OsmAnd-java/src/com/googlecode/concurrentlinkedhashmap/LinkedDeque.java

@@ -0,0 +1,460 @@
+/*
+ * Copyright 2011 Google Inc. All Rights Reserved.
+ *
+ * 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 com.googlecode.concurrentlinkedhashmap;
+
+import java.util.AbstractCollection;
+import java.util.Collection;
+import java.util.Deque;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+/**
+ * Linked list implementation of the {@link Deque} interface where the link
+ * pointers are tightly integrated with the element. Linked deques have no
+ * capacity restrictions; they grow as necessary to support usage. They are not
+ * thread-safe; in the absence of external synchronization, they do not support
+ * concurrent access by multiple threads. Null elements are prohibited.
+ * <p>
+ * Most <tt>LinkedDeque</tt> operations run in constant time by assuming that
+ * the {@link Linked} parameter is associated with the deque instance. Any usage
+ * that violates this assumption will result in non-deterministic behavior.
+ * <p>
+ * The iterators returned by this class are <em>not</em> <i>fail-fast</i>: If
+ * the deque is modified at any time after the iterator is created, the iterator
+ * will be in an unknown state. Thus, in the face of concurrent modification,
+ * the iterator risks arbitrary, non-deterministic behavior at an undetermined
+ * time in the future.
+ *
+ * @author ben.manes@gmail.com (Ben Manes)
+ * @param <E> the type of elements held in this collection
+ * @see <a href="http://code.google.com/p/concurrentlinkedhashmap/">
+ *      http://code.google.com/p/concurrentlinkedhashmap/</a>
+ */
+final class LinkedDeque<E extends Linked<E>> extends AbstractCollection<E> implements Deque<E> {
+
+  // This class provides a doubly-linked list that is optimized for the virtual
+  // machine. The first and last elements are manipulated instead of a slightly
+  // more convenient sentinel element to avoid the insertion of null checks with
+  // NullPointerException throws in the byte code. The links to a removed
+  // element are cleared to help a generational garbage collector if the
+  // discarded elements inhabit more than one generation.
+
+  /**
+   * Pointer to first node.
+   * Invariant: (first == null && last == null) ||
+   *            (first.prev == null)
+   */
+  E first;
+
+  /**
+   * Pointer to last node.
+   * Invariant: (first == null && last == null) ||
+   *            (last.next == null)
+   */
+  E last;
+
+  /**
+   * Links the element to the front of the deque so that it becomes the first
+   * element.
+   *
+   * @param e the unlinked element
+   */
+  void linkFirst(final E e) {
+    final E f = first;
+    first = e;
+
+    if (f == null) {
+      last = e;
+    } else {
+      f.setPrevious(e);
+      e.setNext(f);
+    }
+  }
+
+  /**
+   * Links the element to the back of the deque so that it becomes the last
+   * element.
+   *
+   * @param e the unlinked element
+   */
+  void linkLast(final E e) {
+    final E l = last;
+    last = e;
+
+    if (l == null) {
+      first = e;
+    } else {
+      l.setNext(e);
+      e.setPrevious(l);
+    }
+  }
+
+  /** Unlinks the non-null first element. */
+  E unlinkFirst() {
+    final E f = first;
+    final E next = f.getNext();
+    f.setNext(null);
+
+    first = next;
+    if (next == null) {
+      last = null;
+    } else {
+      next.setPrevious(null);
+    }
+    return f;
+  }
+
+  /** Unlinks the non-null last element. */
+  E unlinkLast() {
+    final E l = last;
+    final E prev = l.getPrevious();
+    l.setPrevious(null);
+    last = prev;
+    if (prev == null) {
+      first = null;
+    } else {
+      prev.setNext(null);
+    }
+    return l;
+  }
+
+  /** Unlinks the non-null element. */
+  void unlink(E e) {
+    final E prev = e.getPrevious();
+    final E next = e.getNext();
+
+    if (prev == null) {
+      first = next;
+    } else {
+      prev.setNext(next);
+      e.setPrevious(null);
+    }
+
+    if (next == null) {
+      last = prev;
+    } else {
+      next.setPrevious(prev);
+      e.setNext(null);
+    }
+  }
+
+  @Override
+  public boolean isEmpty() {
+    return (first == null);
+  }
+
+  void checkNotEmpty() {
+    if (isEmpty()) {
+      throw new NoSuchElementException();
+    }
+  }
+
+  /**
+   * {@inheritDoc}
+   * <p>
+   * Beware that, unlike in most collections, this method is <em>NOT</em> a
+   * constant-time operation.
+   */
+  @Override
+  public int size() {
+    int size = 0;
+    for (E e = first; e != null; e = e.getNext()) {
+      size++;
+    }
+    return size;
+  }
+
+  @Override
+  public void clear() {
+    for (E e = first; e != null;) {
+      E next = e.getNext();
+      e.setPrevious(null);
+      e.setNext(null);
+      e = next;
+    }
+    first = last = null;
+  }
+
+  @Override
+  public boolean contains(Object o) {
+    return (o instanceof Linked<?>) && contains((Linked<?>) o);
+  }
+
+  // A fast-path containment check
+  boolean contains(Linked<?> e) {
+    return (e.getPrevious() != null)
+        || (e.getNext() != null)
+        || (e == first);
+  }
+
+  /**
+   * Moves the element to the front of the deque so that it becomes the first
+   * element.
+   *
+   * @param e the linked element
+   */
+  public void moveToFront(E e) {
+    if (e != first) {
+      unlink(e);
+      linkFirst(e);
+    }
+  }
+
+  /**
+   * Moves the element to the back of the deque so that it becomes the last
+   * element.
+   *
+   * @param e the linked element
+   */
+  public void moveToBack(E e) {
+    if (e != last) {
+      unlink(e);
+      linkLast(e);
+    }
+  }
+
+  @Override
+  public E peek() {
+    return peekFirst();
+  }
+
+  @Override
+  public E peekFirst() {
+    return first;
+  }
+
+  @Override
+  public E peekLast() {
+    return last;
+  }
+
+  @Override
+  public E getFirst() {
+    checkNotEmpty();
+    return peekFirst();
+  }
+
+  @Override
+  public E getLast() {
+    checkNotEmpty();
+    return peekLast();
+  }
+
+  @Override
+  public E element() {
+    return getFirst();
+  }
+
+  @Override
+  public boolean offer(E e) {
+    return offerLast(e);
+  }
+
+  @Override
+  public boolean offerFirst(E e) {
+    if (contains(e)) {
+      return false;
+    }
+    linkFirst(e);
+    return true;
+  }
+
+  @Override
+  public boolean offerLast(E e) {
+    if (contains(e)) {
+      return false;
+    }
+    linkLast(e);
+    return true;
+  }
+
+  @Override
+  public boolean add(E e) {
+    return offerLast(e);
+  }
+
+
+  @Override
+  public void addFirst(E e) {
+    if (!offerFirst(e)) {
+      throw new IllegalArgumentException();
+    }
+  }
+
+  @Override
+  public void addLast(E e) {
+    if (!offerLast(e)) {
+      throw new IllegalArgumentException();
+    }
+  }
+
+  @Override
+  public E poll() {
+    return pollFirst();
+  }
+
+  @Override
+  public E pollFirst() {
+    return isEmpty() ? null : unlinkFirst();
+  }
+
+  @Override
+  public E pollLast() {
+    return isEmpty() ? null : unlinkLast();
+  }
+
+  @Override
+  public E remove() {
+    return removeFirst();
+  }
+
+  @Override
+  @SuppressWarnings("unchecked")
+  public boolean remove(Object o) {
+    return (o instanceof Linked<?>) && remove((E) o);
+  }
+
+  // A fast-path removal
+  boolean remove(E e) {
+    if (contains(e)) {
+      unlink(e);
+      return true;
+    }
+    return false;
+  }
+
+  @Override
+  public E removeFirst() {
+    checkNotEmpty();
+    return pollFirst();
+  }
+
+  @Override
+  public boolean removeFirstOccurrence(Object o) {
+    return remove(o);
+  }
+
+  @Override
+  public E removeLast() {
+    checkNotEmpty();
+    return pollLast();
+  }
+
+  @Override
+  public boolean removeLastOccurrence(Object o) {
+    return remove(o);
+  }
+
+  @Override
+  public boolean removeAll(Collection<?> c) {
+    boolean modified = false;
+    for (Object o : c) {
+      modified |= remove(o);
+    }
+    return modified;
+  }
+
+  @Override
+  public void push(E e) {
+    addFirst(e);
+  }
+
+  @Override
+  public E pop() {
+    return removeFirst();
+  }
+
+  @Override
+  public Iterator<E> iterator() {
+    return new AbstractLinkedIterator(first) {
+      @Override E computeNext() {
+        return cursor.getNext();
+      }
+    };
+  }
+
+  @Override
+  public Iterator<E> descendingIterator() {
+    return new AbstractLinkedIterator(last) {
+      @Override E computeNext() {
+        return cursor.getPrevious();
+      }
+    };
+  }
+
+  abstract class AbstractLinkedIterator implements Iterator<E> {
+    E cursor;
+
+    /**
+     * Creates an iterator that can can traverse the deque.
+     *
+     * @param start the initial element to begin traversal from
+     */
+    AbstractLinkedIterator(E start) {
+      cursor = start;
+    }
+
+    @Override
+    public boolean hasNext() {
+      return (cursor != null);
+    }
+
+    @Override
+    public E next() {
+      if (!hasNext()) {
+        throw new NoSuchElementException();
+      }
+      E e = cursor;
+      cursor = computeNext();
+      return e;
+    }
+
+    @Override
+    public void remove() {
+      throw new UnsupportedOperationException();
+    }
+
+    /**
+     * Retrieves the next element to traverse to or <tt>null</tt> if there are
+     * no more elements.
+     */
+    abstract E computeNext();
+  }
+}
+
+/**
+ * An element that is linked on the {@link Deque}.
+ */
+interface Linked<T extends Linked<T>> {
+
+  /**
+   * Retrieves the previous element or <tt>null</tt> if either the element is
+   * unlinked or the first element on the deque.
+   */
+  T getPrevious();
+
+  /** Sets the previous element or <tt>null</tt> if there is no link. */
+  void setPrevious(T prev);
+
+  /**
+   * Retrieves the next element or <tt>null</tt> if either the element is
+   * unlinked or the last element on the deque.
+   */
+  T getNext();
+
+  /** Sets the next element or <tt>null</tt> if there is no link. */
+  void setNext(T next);
+}

OsmAnd-java/src/com/googlecode/concurrentlinkedhashmap/Weigher.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2010 Google Inc. All Rights Reserved.
+ *
+ * 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 com.googlecode.concurrentlinkedhashmap;
+
+/**
+ * A class that can determine the weight of a value. The total weight threshold
+ * is used to determine when an eviction is required.
+ *
+ * @author ben.manes@gmail.com (Ben Manes)
+ * @see <a href="http://code.google.com/p/concurrentlinkedhashmap/">
+ *      http://code.google.com/p/concurrentlinkedhashmap/</a>
+ */
+public interface Weigher<V> {
+
+  /**
+   * Measures an object's weight to determine how many units of capacity that
+   * the value consumes. A value must consume a minimum of one unit.
+   *
+   * @param value the object to weigh
+   * @return the object's weight
+   */
+  int weightOf(V value);
+}

OsmAnd-java/src/com/googlecode/concurrentlinkedhashmap/Weighers.java

@@ -0,0 +1,282 @@
+/*
+ * Copyright 2010 Google Inc. All Rights Reserved.
+ *
+ * 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 com.googlecode.concurrentlinkedhashmap;
+
+import static com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap.checkNotNull;
+
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * A common set of {@link Weigher} and {@link EntryWeigher} implementations.
+ *
+ * @author ben.manes@gmail.com (Ben Manes)
+ * @see <a href="http://code.google.com/p/concurrentlinkedhashmap/">
+ *      http://code.google.com/p/concurrentlinkedhashmap/</a>
+ */
+public final class Weighers {
+
+  private Weighers() {
+    throw new AssertionError();
+  }
+
+  /**
+   * A entry weigher backed by the specified weigher. The weight of the value
+   * determines the weight of the entry.
+   *
+   * @param weigher the weigher to be "wrapped" in a entry weigher.
+   * @return A entry weigher view of the specified weigher.
+   */
+  public static <K, V> EntryWeigher<K, V> asEntryWeigher(
+      final Weigher<? super V> weigher) {
+    return (weigher == singleton())
+        ? Weighers.<K, V>entrySingleton()
+        : new EntryWeigherView<K, V>(weigher);
+  }
+
+  /**
+   * A weigher where an entry has a weight of <tt>1</tt>. A map bounded with
+   * this weigher will evict when the number of key-value pairs exceeds the
+   * capacity.
+   *
+   * @return A weigher where a value takes one unit of capacity.
+   */
+  @SuppressWarnings({"cast", "unchecked"})
+  public static <K, V> EntryWeigher<K, V> entrySingleton() {
+    return (EntryWeigher<K, V>) SingletonEntryWeigher.INSTANCE;
+  }
+
+  /**
+   * A weigher where a value has a weight of <tt>1</tt>. A map bounded with
+   * this weigher will evict when the number of key-value pairs exceeds the
+   * capacity.
+   *
+   * @return A weigher where a value takes one unit of capacity.
+   */
+  @SuppressWarnings({"cast", "unchecked"})
+  public static <V> Weigher<V> singleton() {
+    return (Weigher<V>) SingletonWeigher.INSTANCE;
+  }
+
+  /**
+   * A weigher where the value is a byte array and its weight is the number of
+   * bytes. A map bounded with this weigher will evict when the number of bytes
+   * exceeds the capacity rather than the number of key-value pairs in the map.
+   * This allows for restricting the capacity based on the memory-consumption
+   * and is primarily for usage by dedicated caching servers that hold the
+   * serialized data.
+   * <p>
+   * A value with a weight of <tt>0</tt> will be rejected by the map. If a value
+   * with this weight can occur then the caller should eagerly evaluate the
+   * value and treat it as a removal operation. Alternatively, a custom weigher
+   * may be specified on the map to assign an empty value a positive weight.
+   *
+   * @return A weigher where each byte takes one unit of capacity.
+   */
+  public static Weigher<byte[]> byteArray() {
+    return ByteArrayWeigher.INSTANCE;
+  }
+
+  /**
+   * A weigher where the value is a {@link Iterable} and its weight is the
+   * number of elements. This weigher only should be used when the alternative
+   * {@link #collection()} weigher cannot be, as evaluation takes O(n) time. A
+   * map bounded with this weigher will evict when the total number of elements
+   * exceeds the capacity rather than the number of key-value pairs in the map.
+   * <p>
+   * A value with a weight of <tt>0</tt> will be rejected by the map. If a value
+   * with this weight can occur then the caller should eagerly evaluate the
+   * value and treat it as a removal operation. Alternatively, a custom weigher
+   * may be specified on the map to assign an empty value a positive weight.
+   *
+   * @return A weigher where each element takes one unit of capacity.
+   */
+  @SuppressWarnings({"cast", "unchecked"})
+  public static <E> Weigher<? super Iterable<E>> iterable() {
+    return (Weigher<Iterable<E>>) (Weigher<?>) IterableWeigher.INSTANCE;
+  }
+
+  /**
+   * A weigher where the value is a {@link Collection} and its weight is the
+   * number of elements. A map bounded with this weigher will evict when the
+   * total number of elements exceeds the capacity rather than the number of
+   * key-value pairs in the map.
+   * <p>
+   * A value with a weight of <tt>0</tt> will be rejected by the map. If a value
+   * with this weight can occur then the caller should eagerly evaluate the
+   * value and treat it as a removal operation. Alternatively, a custom weigher
+   * may be specified on the map to assign an empty value a positive weight.
+   *
+   * @return A weigher where each element takes one unit of capacity.
+   */
+  @SuppressWarnings({"cast", "unchecked"})
+  public static <E> Weigher<? super Collection<E>> collection() {
+    return (Weigher<Collection<E>>) (Weigher<?>) CollectionWeigher.INSTANCE;
+  }
+
+  /**
+   * A weigher where the value is a {@link List} and its weight is the number
+   * of elements. A map bounded with this weigher will evict when the total
+   * number of elements exceeds the capacity rather than the number of
+   * key-value pairs in the map.
+   * <p>
+   * A value with a weight of <tt>0</tt> will be rejected by the map. If a value
+   * with this weight can occur then the caller should eagerly evaluate the
+   * value and treat it as a removal operation. Alternatively, a custom weigher
+   * may be specified on the map to assign an empty value a positive weight.
+   *
+   * @return A weigher where each element takes one unit of capacity.
+   */
+  @SuppressWarnings({"cast", "unchecked"})
+  public static <E> Weigher<? super List<E>> list() {
+    return (Weigher<List<E>>) (Weigher<?>) ListWeigher.INSTANCE;
+  }
+
+  /**
+   * A weigher where the value is a {@link Set} and its weight is the number
+   * of elements. A map bounded with this weigher will evict when the total
+   * number of elements exceeds the capacity rather than the number of
+   * key-value pairs in the map.
+   * <p>
+   * A value with a weight of <tt>0</tt> will be rejected by the map. If a value
+   * with this weight can occur then the caller should eagerly evaluate the
+   * value and treat it as a removal operation. Alternatively, a custom weigher
+   * may be specified on the map to assign an empty value a positive weight.
+   *
+   * @return A weigher where each element takes one unit of capacity.
+   */
+  @SuppressWarnings({"cast", "unchecked"})
+  public static <E> Weigher<? super Set<E>> set() {
+    return (Weigher<Set<E>>) (Weigher<?>) SetWeigher.INSTANCE;
+  }
+
+  /**
+   * A weigher where the value is a {@link Map} and its weight is the number of
+   * entries. A map bounded with this weigher will evict when the total number of
+   * entries across all values exceeds the capacity rather than the number of
+   * key-value pairs in the map.
+   * <p>
+   * A value with a weight of <tt>0</tt> will be rejected by the map. If a value
+   * with this weight can occur then the caller should eagerly evaluate the
+   * value and treat it as a removal operation. Alternatively, a custom weigher
+   * may be specified on the map to assign an empty value a positive weight.
+   *
+   * @return A weigher where each entry takes one unit of capacity.
+   */
+  @SuppressWarnings({"cast", "unchecked"})
+  public static <A, B> Weigher<? super Map<A, B>> map() {
+    return (Weigher<Map<A, B>>) (Weigher<?>) MapWeigher.INSTANCE;
+  }
+
+  static final class EntryWeigherView<K, V> implements EntryWeigher<K, V>, Serializable {
+    static final long serialVersionUID = 1;
+    final Weigher<? super V> weigher;
+
+    EntryWeigherView(Weigher<? super V> weigher) {
+      checkNotNull(weigher);
+      this.weigher = weigher;
+    }
+
+    @Override
+    public int weightOf(K key, V value) {
+      return weigher.weightOf(value);
+    }
+  }
+
+  enum SingletonEntryWeigher implements EntryWeigher<Object, Object> {
+    INSTANCE;
+
+    @Override
+    public int weightOf(Object key, Object value) {
+      return 1;
+    }
+  }
+
+  enum SingletonWeigher implements Weigher<Object> {
+    INSTANCE;
+
+    @Override
+    public int weightOf(Object value) {
+      return 1;
+    }
+  }
+
+  enum ByteArrayWeigher implements Weigher<byte[]> {
+    INSTANCE;
+
+    @Override
+    public int weightOf(byte[] value) {
+      return value.length;
+    }
+  }
+
+  enum IterableWeigher implements Weigher<Iterable<?>> {
+    INSTANCE;
+
+    @Override
+    public int weightOf(Iterable<?> values) {
+      if (values instanceof Collection<?>) {
+        return ((Collection<?>) values).size();
+      }
+      int size = 0;
+      for (Iterator<?> i = values.iterator(); i.hasNext();) {
+        i.next();
+        size++;
+      }
+      return size;
+    }
+  }
+
+  enum CollectionWeigher implements Weigher<Collection<?>> {
+    INSTANCE;
+
+    @Override
+    public int weightOf(Collection<?> values) {
+      return values.size();
+    }
+  }
+
+  enum ListWeigher implements Weigher<List<?>> {
+    INSTANCE;
+
+    @Override
+    public int weightOf(List<?> values) {
+      return values.size();
+    }
+  }
+
+  enum SetWeigher implements Weigher<Set<?>> {
+    INSTANCE;
+
+    @Override
+    public int weightOf(Set<?> values) {
+      return values.size();
+    }
+  }
+
+  enum MapWeigher implements Weigher<Map<?, ?>> {
+    INSTANCE;
+
+    @Override
+    public int weightOf(Map<?, ?> values) {
+      return values.size();
+    }
+  }
+}

OsmAnd-java/src/com/googlecode/concurrentlinkedhashmap/package-info.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2011 Google Inc. All Rights Reserved.
+ *
+ * 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.
+ */
+
+/**
+ * This package contains an implementation of a bounded
+ * {@link java.util.concurrent.ConcurrentMap} data structure.
+ * <p>
+ * {@link com.googlecode.concurrentlinkedhashmap.Weigher} is a simple interface
+ * for determining how many units of capacity an entry consumes. Depending on
+ * which concrete Weigher class is used, an entry may consume a different amount
+ * of space within the cache. The
+ * {@link com.googlecode.concurrentlinkedhashmap.Weighers} class provides
+ * utility methods for obtaining the most common kinds of implementations.
+ * <p>
+ * {@link com.googlecode.concurrentlinkedhashmap.EvictionListener} provides the
+ * ability to be notified when an entry is evicted from the map. An eviction
+ * occurs when the entry was automatically removed due to the map exceeding a
+ * capacity threshold. It is not called when an entry was explicitly removed.
+ * <p>
+ * The {@link com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap}
+ * class supplies an efficient, scalable, thread-safe, bounded map. As with the
+ * <tt>Java Collections Framework</tt> the "Concurrent" prefix is used to
+ * indicate that the map is not governed by a single exclusion lock.
+ *
+ * @see <a href="http://code.google.com/p/concurrentlinkedhashmap/">
+ *      http://code.google.com/p/concurrentlinkedhashmap/</a>
+ */
+package com.googlecode.concurrentlinkedhashmap;

OsmAnd/src/net/osmand/plus/audionotes/AudioVideoNotesPlugin.java

@@ -35,6 +35,8 @@ import android.widget.ArrayAdapter;
 import android.widget.ImageView;
 import android.widget.Toast;
 
+import com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap;
+
 import net.osmand.AndroidUtils;
 import net.osmand.IProgress;
 import net.osmand.IndexConstants;
@@ -75,10 +77,8 @@ import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.Comparator;
 import java.util.Iterator;
-import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -130,13 +130,17 @@ public class AudioVideoNotesPlugin extends OsmandPlugin {
 	public final OsmandPreference<Boolean> SHOW_RECORDINGS;
 
 	private DataTileManager<Recording> recordings = new DataTileManager<AudioVideoNotesPlugin.Recording>(14);
-	private Map<String, Recording> recordingByFileName = Collections.synchronizedMap(new LinkedHashMap<String, Recording>());
+	private Map<String, Recording> recordingByFileName =
+			new ConcurrentLinkedHashMap.Builder<String, Recording>()
+					.maximumWeightedCapacity(1000)
+					.build();
 	private AudioNotesLayer audioNotesLayer;
 	private MapActivity activity;
 	private MediaRecorder mediaRec;
 	private File lastTakingPhoto;
 
 	private final static char SPLIT_DESC = ' ';
+
 	public static class Recording {
 		public Recording(File f) {
 			this.file = f;