/**

  * Copyright (c) 2012-2016, jcabi.com

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met: 1) Redistributions of source code must retain the above

  * copyright notice, this list of conditions and the following

  * disclaimer. 2) Redistributions in binary form must reproduce the above

  * copyright notice, this list of conditions and the following

  * disclaimer in the documentation and/or other materials provided

  * with the distribution. 3) Neither the name of the jcabi.com nor

  * the names of its contributors may be used to endorse or promote

  * products derived from this software without specific prior written

  * permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT

  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL

  * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

  * OF THE POSSIBILITY OF SUCH DAMAGE.

  */

 package com.jcabi.dynamo;

 import com.amazonaws.services.dynamodbv2.model.Condition;

 import com.jcabi.aspects.Immutable;

 import com.jcabi.aspects.Loggable;

 import java.io.IOException;

 import java.util.AbstractCollection;

 import java.util.Iterator;

 import java.util.Map;

 import lombok.EqualsAndHashCode;

 import lombok.ToString;

 /**

  * Frame through AWS SDK.

  *

  * @author Yegor Bugayenko (yegor@tpc2.com)

  * @version $Id: 4074bf2dc3686b2202db80479c266668af3da41b $

  * @since 0.1

  */

 @Immutable

 @Loggable(Loggable.DEBUG)

 @ToString

 @EqualsAndHashCode

     (

         callSuper = false,

         of = { "credentials", "tbl", "name", "conditions", "valve" }

     )

 final class AwsFrame extends AbstractCollection<Item> implements Frame {

     /**

      * AWS credentials.

      */

     private final transient Credentials credentials;

     /**

      * Table.

      */

     private final transient AwsTable tbl;

     /**

      * Table name.

      */

     private final transient String name;

     /**

      * Conditions.

      */

     private final transient Conditions conditions;

     /**

      * Valve with items.

      */

     private final transient Valve valve;

     /**

      * Public ctor.

      * @param creds Credentials

      * @param table Table

      * @param label Table name

      */

     AwsFrame(final Credentials creds, final AwsTable table,

         final String label) {

         this(creds, table, label, new Conditions(), new ScanValve());

     }

     /**

      * Public ctor.

      * @param creds Credentials

      * @param table Table

      * @param label Table name

      * @param conds Conditions

      * @param vlv Valve

      * @checkstyle ParameterNumber (5 lines)

      */

     AwsFrame(final Credentials creds, final AwsTable table,

         final String label, final Conditions conds, final Valve vlv) {

         super();

         this.credentials = creds;

         this.tbl = table;

         this.name = label;

         this.conditions = conds;

         this.valve = vlv;

     }

     @Override

     public Iterator<Item> iterator() {

         try {

             return new AwsIterator(

                 this.credentials,

                 this,

                 this.name,

                 this.conditions,

                 this.tbl.keys(),

                 this.valve

             );

         } catch (final IOException ex) {

             throw new IllegalStateException(ex);

         }

     }

     @Override

     public int size() {

         try {

             return this.valve.count(

                 this.credentials, this.name, this.conditions

             );

         } catch (final IOException ex) {

             throw new IllegalStateException(

                 String.format("can't count items in \"%s\"", this.name),

                 ex

             );

         }

     }

     @Override

     public Frame where(final String attr, final String value) {

         return this.where(attr, Conditions.equalTo(value));

     }

     @Override

     public Frame where(final String attr, final Condition condition) {

         return new AwsFrame(

             this.credentials,

             this.tbl,

             this.name,

             this.conditions.with(attr, condition),

             this.valve

         );

     }

     @Override

     public Frame where(final Map<String, Condition> conds) {

         return new AwsFrame(

             this.credentials,

             this.tbl,

             this.name,

             this.conditions.with(conds),

             this.valve

         );

     }

     @Override

     public Frame through(final Valve vlv) {

         return new AwsFrame(

             this.credentials,

             this.tbl,

             this.name,

             this.conditions,

             vlv

         );

     }

     @Override

     public Table table() {

         return this.tbl;

     }

 }