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Easily iterate through Android sparse collections
/**
* 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.bmd.android.collection.internal;
import android.annotation.SuppressLint;
import android.os.Parcelable;
import android.util.SparseIntArray;
import com.bmd.android.collection.entry.IntSparseIntEntry;
import com.bmd.android.collection.entry.ParcelableIntSparseIntEntry;
import com.bmd.android.collection.entry.SparseIntArrayEntry;
import com.bmd.android.collection.filter.Filter;
import com.bmd.android.collection.filter.SparseIntArrayFilterBuilder;
import com.bmd.android.collection.iterator.IntSparseIterable;
import com.bmd.android.collection.iterator.SparseIntArrayIterable;
import com.bmd.android.collection.translator.FullIntTranslator;
import com.bmd.android.collection.translator.IntTranslator;
import com.bmd.android.collection.translator.Translator;
import com.bmd.android.collection.translator.Translators;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
/**
* Implementation of a {@link com.bmd.android.collection.iterator.SparseIntArrayIterable}.
*
* Created by davide on 3/12/14.
*/
class SparseIntArrayIterableImpl extends AbstractSparseIterable
implements SparseIntArrayIterable {
private static volatile KeyTranslator sKeyTranslator;
private static volatile ValueTranslator sValueTranslator;
private final SparseIntArray mArray;
private SparseIntArrayFilterBuilderImpl mExclusionBuilder;
private SparseIntArrayFilterBuilderImpl mInclusionBuilder;
public SparseIntArrayIterableImpl(final SparseIntArray array) {
mArray = array;
}
SparseIntArrayIterableImpl(final SparseIntArrayIterableImpl other) {
super(other);
mArray = other.mArray;
}
@Override
public SparseIntArrayIterable appendTo(final SparseIntArray other) {
for (final SparseIntArrayEntry entry : this) {
other.append(entry.getKey(), entry.getValue());
}
return this;
}
@Override
public boolean containsAllKeys(final int... keys) {
for (final int key : keys) {
if (positionOfKey(key) < 0) {
return false;
}
}
return true;
}
@Override
public boolean containsAllKeys(final Iterable keys) {
for (final int key : keys) {
if (positionOfKey(key) < 0) {
return false;
}
}
return true;
}
@Override
public boolean containsAllValues(final int... values) {
for (final int value : values) {
if (firstPositionOfValue(value) < 0) {
return false;
}
}
return true;
}
@Override
public boolean containsAllValues(final Iterable values) {
for (final int value : values) {
if (firstPositionOfValue(value) < 0) {
return false;
}
}
return true;
}
@Override
public boolean containsAnyKey(final int... keys) {
for (final int key : keys) {
if (positionOfKey(key) >= 0) {
return true;
}
}
return false;
}
@Override
public boolean containsAnyKey(final Iterable keys) {
for (final int key : keys) {
if (positionOfKey(key) >= 0) {
return true;
}
}
return false;
}
@Override
public boolean containsAnyValue(final int... values) {
for (final int value : values) {
if (firstPositionOfValue(value) >= 0) {
return true;
}
}
return false;
}
@Override
public boolean containsAnyValue(final Iterable values) {
for (final int value : values) {
if (firstPositionOfValue(value) >= 0) {
return true;
}
}
return false;
}
@Override
public boolean containsKey(final int key) {
return positionOfKey(key) >= 0;
}
@Override
public boolean containsValue(final int value) {
return firstPositionOfValue(value) >= 0;
}
@Override
public SparseIntArrayIterable fill(final Map map) {
for (final SparseIntArrayEntry entry : this) {
map.put(entry.getKey(), entry.getValue());
}
return this;
}
@Override
public SparseIntArrayIterable fillImmutable(
final Collection collection) {
for (final SparseIntArrayEntry entry : this) {
collection.add(entry.toImmutable());
}
return this;
}
@Override
public SparseIntArrayIterable fillImmutable(final T[] array) {
return fillImmutable(array, 0);
}
@Override
public SparseIntArrayIterable fillImmutable(final T[] array, final int offset) {
int i = offset;
for (final SparseIntArrayEntry entry : this) {
//noinspection unchecked
array[i++] = (T) entry.toImmutable();
}
return this;
}
@Override
public SparseIntArrayIterable fillParcelable(
final Collection collection) {
for (final SparseIntArrayEntry entry : this) {
collection.add(entry.toParcelable());
}
return this;
}
@Override
public SparseIntArrayIterable fillParcelable(final T[] array) {
return fillParcelable(array, 0);
}
@Override
public SparseIntArrayIterable fillParcelable(final T[] array,
final int offset) {
int i = offset;
for (final SparseIntArrayEntry entry : this) {
//noinspection unchecked
array[i++] = (T) entry.toParcelable();
}
return this;
}
@Override
public int firstIndexOfValue(final int value) {
for (final SparseIntArrayEntry entry : this) {
if (entry.getValue() == value) {
return entry.getIndex();
}
}
return -1;
}
@Override
public int firstPositionOfValue(final int value) {
int i = 0;
for (final SparseIntArrayEntry entry : this) {
if (entry.getValue() == value) {
return i;
}
++i;
}
return -1;
}
@Override
public int indexOfKey(final int key) {
for (final SparseIntArrayEntry entry : this) {
if (entry.getKey() == key) {
return entry.getIndex();
}
}
return -1;
}
@Override
public boolean isEqualTo(final SparseIntArray array) {
int count = 0;
for (final SparseIntArrayEntry entry : this) {
final int value = array.get(entry.getKey());
if (entry.getValue() != value) {
return false;
}
++count;
}
return (count == array.size());
}
@Override
public boolean isEqualTo(final Map map) {
int count = 0;
for (final SparseIntArrayEntry entry : this) {
final Object value = map.get(entry.getKey());
if (value == null) {
return false;
} else if (!value.equals(entry.getValue())) {
return false;
}
++count;
}
return (count == map.size());
}
@Override
public IntSparseIterable keys() {
if (sKeyTranslator == null) {
sKeyTranslator = new KeyTranslator();
}
return toIntegers(sKeyTranslator);
}
@Override
public int positionOfKey(final int key) {
int i = 0;
for (final SparseIntArrayEntry entry : this) {
if (entry.getKey() == key) {
return i;
}
++i;
}
return -1;
}
@Override
public SparseIntArrayIterable putInto(final SparseIntArray other) {
for (final SparseIntArrayEntry entry : this) {
other.put(entry.getKey(), entry.getValue());
}
return this;
}
@Override
public SparseIntArrayIterable replaceValues(final IntTranslator translator) {
final SparseIntArray array = mArray;
for (final SparseIntArrayEntry entry : this) {
array.append(entry.getKey(), translator.translate(entry.getValue()));
}
return this;
}
@Override
public T[] toImmutableArray(final Class type) {
final ArrayList list = toImmutableList();
//noinspection unchecked,SuspiciousToArrayCall
return list.toArray((T[]) Array.newInstance(type, list.size()));
}
@Override
public ArrayList toImmutableList() {
final ArrayList list = new ArrayList();
fillImmutable(list);
return list;
}
@Override
public Map toMap() {
@SuppressLint("UseSparseArrays")
final HashMap map = new HashMap();
fill(map);
return map;
}
@Override
public T[] toParcelableArray(final Class type) {
final ArrayList list = toParcelableList();
//noinspection unchecked,SuspiciousToArrayCall
return list.toArray((T[]) Array.newInstance(type, list.size()));
}
@Override
public ArrayList toParcelableList() {
final ArrayList list =
new ArrayList();
fillParcelable(list);
return list;
}
@Override
public SortedMap toSortedMap() {
final TreeMap map = new TreeMap();
fill(map);
return map;
}
@Override
public SparseIntArray toSparseArray() {
final SparseIntArray array = new SparseIntArray();
for (final SparseIntArrayEntry entry : this) {
array.append(entry.getKey(), entry.getValue());
}
return array;
}
@Override
public SparseIntArrayIterable translate(final IntTranslator keyTranslator,
final IntTranslator valueTranslator) {
return new TranslatedSparseIntArrayIterableImpl(this, Translators.full(keyTranslator),
Translators.full(valueTranslator));
}
@Override
public SparseIntArrayIterable translateKeys(final IntTranslator keyTranslator) {
final FullIntTranslator valueTranslator = Translators.intIdentity();
return translate(keyTranslator, valueTranslator);
}
@Override
public SparseIntArrayIterable translateValues(final IntTranslator translator) {
return translate(Translators.intIdentity(), translator);
}
@Override
public IntSparseIterable values() {
if (sValueTranslator == null) {
sValueTranslator = new ValueTranslator();
}
return toIntegers(sValueTranslator);
}
@Override
public SparseIntArrayFilterBuilder but() {
if (mExclusionBuilder == null) {
mExclusionBuilder = new SparseIntArrayFilterBuilderImpl(this, false);
}
return mExclusionBuilder;
}
@Override
public SparseIntArrayIterable but(final Filter filter) {
super.but(filter);
return this;
}
@Override
public SparseIntArrayIterable doWhile(final Condition condition) {
super.doWhile(condition);
return this;
}
@Override
public SparseIntArrayIterable forEach(final Action action) {
super.forEach(action);
return this;
}
@Override
public SparseIntArrayFilterBuilder only() {
if (mInclusionBuilder == null) {
mInclusionBuilder = new SparseIntArrayFilterBuilderImpl(this, true);
}
return mInclusionBuilder;
}
@Override
public SparseIntArrayIterable only(final Filter filter) {
super.only(filter);
return this;
}
@Override
public SparseIntArrayIterable remove() {
super.remove();
return this;
}
@Override
public SparseIntArrayIterable retain() {
super.retain();
return this;
}
@Override
public SparseIntArrayIterable reverse() {
super.reverse();
return this;
}
private static class KeyTranslator implements Translator {
@Override
public Integer translate(final SparseIntArrayEntry element) {
return element.getKey();
}
}
private static class TranslatedSparseIntArrayIterableImpl extends SparseIntArrayIterableImpl {
private final SparseIntArrayIterableImpl mIterable;
private final FullIntTranslator mKeyTranslator;
private final FullIntTranslator mValueTranslator;
public TranslatedSparseIntArrayIterableImpl(final SparseIntArrayIterableImpl wrapped,
final FullIntTranslator keyTranslator, final FullIntTranslator valueTranslator) {
super((SparseIntArray) null);
mIterable = wrapped;
mKeyTranslator = keyTranslator;
mValueTranslator = valueTranslator;
}
private TranslatedSparseIntArrayIterableImpl(
final TranslatedSparseIntArrayIterableImpl other) {
super(other);
mIterable = other.mIterable;
mKeyTranslator = other.mKeyTranslator;
mValueTranslator = other.mValueTranslator;
}
@Override
protected TranslatedSparseIntArrayIterableImpl copy() {
return new TranslatedSparseIntArrayIterableImpl(this);
}
@Override
protected SparseIterator createIterator(final boolean isReverse) {
final SparseIntArrayIterableImpl iterable;
if (isReverse) {
iterable = mIterable.copy();
iterable.reverse();
} else {
iterable = mIterable;
}
final SparseIterator iterator = iterable.filteredIterator(false);
return new TranslatedSparseIntArrayIterator(iterator, mKeyTranslator, mValueTranslator);
}
@Override
protected SparseIterator rawIterator(final boolean isReverse) {
final SparseIterator iterator = mIterable.rawIterator(isReverse);
return new TranslatedSparseIntArrayIterator(iterator, mKeyTranslator, mValueTranslator);
}
@Override
protected void clearFilters() {
super.clearFilters();
mIterable.clearFilters();
}
}
private static class ValueTranslator implements Translator {
@Override
public Integer translate(final SparseIntArrayEntry element) {
return element.getValue();
}
}
@Override
protected SparseIntArrayIterableImpl copy() {
return new SparseIntArrayIterableImpl(this);
}
@Override
protected SparseIterator createIterator(final boolean isReverse) {
if (isReverse) {
return new SparseIntArrayReverseIterator(mArray);
}
return new SparseIntArrayIterator(mArray);
}
@Override
protected SparseIterator rawIterator(final boolean isReverse) {
return createIterator(isReverse);
}
}