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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.iterator;
import com.bmd.android.collection.filter.Filter;
import com.bmd.android.collection.filter.FilterBuilder;
import com.bmd.android.collection.translator.Translator;
import java.util.Collection;
/**
* This interface defines the base functionalities of an {@link java.lang.Iterable} wrapping an
* Android sparse collection, such as {@link android.util.SparseArray} and
* {@link android.support.v4.util.SparseArrayCompat}.
*
* Created by davide on 3/10/14.
*
* @see com.bmd.android.collection.v18.AndroidCollections
*/
public interface SparseIterable extends Iterable {
/**
* Applies the specified condition to all the elements returned by the iterator in the
* iteration order. The iteration is stopped as soon as the call to the condition returns with
* true.
*
* @param condition the condition to apply.
* @return whether the call to the condition returns true for at least one element.
*/
public boolean any(Condition condition);
/**
* Returns an exclusion filter builder.
*
* @return the filter builder instance.
*/
public FilterBuilder, E> but();
/**
* Concatenates an exclusion filter to the existing ones, if any.
*
* Note that the specified filter can be both a simple
* {@link com.bmd.android.collection.filter.Filter} or an
* {@link com.bmd.android.collection.filter.AdvancedFilter} instance.
*
* @param filter the filter to add.
* @return this iterable.
*/
public SparseIterable but(Filter filter);
/**
* Checks if the elements returned by the current filtered iterator contain the specified
* object.
*
* @param element the element to search for.
* @return whether the element belongs to the iteration.
*/
public boolean contains(Object element);
/**
* Checks if the elements returned by the current filtered iterator contain all the specified
* objects in any order.
*
* @param elements the elements to search for.
* @return whether all the elements belong to the iteration.
*/
public boolean containsAll(Object... elements);
/**
* Checks if the elements returned by the current filtered iterator contain all the ones
* returned by the specified iterable in any order.
*
* @param elements the iterable of elements to search for.
* @return whether all the elements belong to the iteration.
*/
public boolean containsAll(Iterable elements);
/**
* Checks if the elements returned by the current filtered iterator contain at least one of
* the specified objects.
*
* @param elements the elements to search for.
* @return whether any of the elements belong to the iteration.
*/
public boolean containsAny(Object... elements);
/**
* Checks if the elements returned by the current filtered iterator contain any of the ones
* returned by the specified iterable.
*
* @param elements the iterable of elements to search for.
* @return whether any of the elements belong to the iteration.
*/
public boolean containsAny(Iterable elements);
/**
* Returns the total number of times an element equal to the specified one is encountered
* during the iteration.
*
* @param element the element to search for.
* @return the total occurrences.
*/
public int countOf(Object element);
/**
* Applies the specified condition to all the elements returned by the iterator in the
* iteration order. The iteration is stopped as soon as the call to the condition returns with
* false.
*
* @param condition the condition to apply.
* @return this iterable.
*/
public SparseIterable doWhile(Condition condition);
/**
* Applies the specified condition to all the elements returned by the iterator in the
* iteration order. The iteration is stopped as soon as the call to the condition returns with
* false.
*
* @param condition the condition to apply.
* @return whether the call to the condition returns true for each element.
*/
public boolean each(Condition condition);
/**
* Finds the index of the first element, in the iteration order, equals to the specified one.
*
* @param element the element to search for.
* @return the index in the iteration, or -1 if the object is not found.
*/
public int firstIndexOf(Object element);
/**
* Finds the position of the first element, in the iteration order, equal to the specified one.
*
* Note that the returned value is relative to the iterator cycles so, in case filters has been
* applied to this iterable, the returned number might not match with the index in the sparse
* collection.
*
* @param element the element to search for.
* @return the position in the iteration, or -1 if the object is not found.
*/
public int firstPositionOf(Object element);
/**
* Applies the specified action to all the elements returned by the iterator in the iteration
* order.
*
* @param action the action to apply.
* @return this iterable.
*/
public SparseIterable forEach(Action action);
/**
* Checks if all and only the elements returned by the this iterable are contained in the
* specified collection.
*
* @param collection the collection to compare.
* @return whether the specified collection equals this iterable.
*/
public boolean isEqualTo(Collection collection);
/**
* Checks if every element returned by the specified iterable is equal to the one returned by
* this iterator in the same order.
*
* @param iterable the iterable to compare.
* @return whether the specified iterable equals this one.
*/
public boolean isStrictlyEqualTo(Iterable iterable);
/**
* Returns an inclusion filter builder.
*
* @return the filter builder instance.
*/
public FilterBuilder, E> only();
/**
* Concatenates an inclusion filter to the existing ones, if any.
*
* Note that the specified filter can be both a simple
* {@link com.bmd.android.collection.filter.Filter} or an
* {@link com.bmd.android.collection.filter.AdvancedFilter} instance.
*
* @param filter the filter to add.
* @return this iterable.
*/
public SparseIterable only(Filter filter);
/**
* Removes from the wrapped sparse collection all the elements returned by this iterable.
*
* @return this iterable
*/
public SparseIterable remove();
/**
* Retains in the wrapped sparse collection all the elements returned by this iterable. That
* is, all the other elements will be removed.
*
* @return this iterable
*/
public SparseIterable retain();
/**
* Reverse the iteration order.
*
* @return this iterable
*/
public SparseIterable reverse();
/**
* Transforms this iterator in a
* {@link com.bmd.android.collection.iterator.BooleanSparseIterable} by applying the specified
* translator to each element.
*
* Note that the returned iterable is backed by the same sparse collection.
*
* @param translator the translator.
* @return the new iterable.
*/
public BooleanSparseIterable toBooleans(Translator translator);
/**
* Transforms this iterator in a {@link com.bmd.android.collection.iterator.IntSparseIterable}
* by applying the specified translator to each element.
*
* Note that the returned iterable is backed by the same sparse collection.
*
* @param translator the translator.
* @return the new iterable.
*/
public IntSparseIterable toIntegers(Translator translator);
/**
* Transforms this iterator in a {@link com.bmd.android.collection.iterator.LongSparseIterable}
* by applying the specified translator to each element.
*
* Note that the returned iterable is backed by the same sparse collection.
*
* @param translator the translator.
* @return the new iterable.
*/
public LongSparseIterable toLongs(Translator translator);
/**
* This interface defines an action to be applied to the iterable elements.
*
* @param the element type.
*/
public interface Action {
/**
* This function will be called for each element returned by the iterable.
*
* @param element the element instance.
* @param count the number of element iterated until now.
* @param index the index of the element in the sparse collection.
*/
public void onNext(E element, int count, int index);
}
/**
* This interface defines a condition to be applied to the iterable elements.
*
* @param the element type.
*/
public interface Condition {
/**
* This function will be called for each element returned by the iterable.
*
* @param element the element instance.
* @param count the number of element iterated until now.
* @param index the index of the element in the sparse collection.
* @return whether to proceed with the iteration.
*/
public boolean onNext(E element, int count, int index);
}
}