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1 efrain 1 
<?php
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namespace Aws\Api;
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/**
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 * Represents a map shape.
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 */
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class MapShape extends Shape
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{
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    /** @var Shape */
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    private $value;
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    /** @var Shape */
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    private $key;
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    public function __construct(array $definition, ShapeMap $shapeMap)
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    {
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        $definition['type'] = 'map';
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        parent::__construct($definition, $shapeMap);
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    }
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    /**
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     * @return Shape
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     * @throws \RuntimeException if no value is specified
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     */
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    public function getValue()
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    {
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        if (!$this->value) {
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            if (!isset($this->definition['value'])) {
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                throw new \RuntimeException('No value specified');
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            }
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            $this->value = Shape::create(
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                $this->definition['value'],
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                $this->shapeMap
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            );
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        }
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        return $this->value;
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    }
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    /**
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     * @return Shape
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     */
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    public function getKey()
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    {
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        if (!$this->key) {
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            $this->key = isset($this->definition['key'])
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                ? Shape::create($this->definition['key'], $this->shapeMap)
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                : new Shape(['type' => 'string'], $this->shapeMap);
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        }
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        return $this->key;
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    }
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}