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/*
 * Copyright 2014 Goldman Sachs.
 *
 * 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.gs.collections.api;

/**
 * PrimitiveIterable includes API that is common to all primitive collections.
 *
 * @since 3.0
 */
public interface PrimitiveIterable
{
    /**
     * Returns the number of items in this iterable.
     *
     * @since 3.0
     */
    int size();

    /**
     * Returns true if this iterable has zero items.
     *
     * @since 3.0
     */
    boolean isEmpty();

    /**
     * The English equivalent of !this.isEmpty()
     *
     * @since 3.0
     */
    boolean notEmpty();

    /**
     * Returns a string representation of this PrimitiveIterable.  The string representation consists of a list of the
     * PrimitiveIterable's elements in the order they are returned by its iterator, enclosed in square brackets
     * ("[]").  Adjacent elements are separated by the characters ", " (comma and space).  Elements
     * are converted to strings as by String#valueOf().
     *
     * @return a string representation of this PrimitiveIterable
     */
    String toString();

    /**
     * Returns a string representation of this collection by delegating to {@link #makeString(String)} and defaulting
     * the separator parameter to the characters ", " (comma and space).
     *
     * @return a string representation of this collection.
     * @since 3.0
     */
    String makeString();

    /**
     * Returns a string representation of this collection by delegating to {@link #makeString(String, String, String)}
     * and defaulting the start and end parameters to "" (the empty String).
     *
     * @return a string representation of this collection.
     * @since 3.0
     */
    String makeString(String separator);

    /**
     * Returns a string representation of this collection.  The string representation consists of a list of the
     * collection's elements in the order they are returned by its iterator, enclosed in the start and end strings.
     * Adjacent elements are separated by the separator string.  Elements are converted to strings using the appropriate
     * version of String.valueOf().
     *
     * @return a string representation of this collection.
     * @since 3.0
     */
    String makeString(String start, String separator, String end);

    /**
     * Prints a string representation of this collection onto the given {@code Appendable}.  Prints the string returned
     * by {@link #makeString()}.
     *
     * @since 3.0
     */
    void appendString(Appendable appendable);

    /**
     * Prints a string representation of this collection onto the given {@code Appendable}.  Prints the string returned
     * by {@link #makeString(String)}.
     *
     * @since 3.0
     */
    void appendString(Appendable appendable, String separator);

    /**
     * Prints a string representation of this collection onto the given {@code Appendable}.  Prints the string returned
     * by {@link #makeString(String, String, String)}.
     *
     * @since 3.0
     */
    void appendString(Appendable appendable, String start, String separator, String end);
}