Added missing DSL queries

Query/BoostingQuery.php

+<?php
+
+/*
+ * This file is part of the ONGR package.
+ *
+ * (c) NFQ Technologies UAB <info@nfq.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace ONGR\ElasticsearchBundle\DSL\Query;
+
+use ONGR\ElasticsearchBundle\DSL\BuilderInterface;
+
+/**
+ * Elasticsearch boosting query class.
+ */
+class BoostingQuery implements BuilderInterface
+{
+    /**
+     * @var BuilderInterface
+     */
+    private $positive;
+
+    /**
+     * @var BuilderInterface
+     */
+    private $negative;
+
+    /**
+     * @var int|float
+     */
+    private $negativeBoost;
+
+    /**
+     * @param BuilderInterface $positive
+     * @param BuilderInterface $negative
+     * @param int|float        $negativeBoost
+     */
+    public function __construct(BuilderInterface $positive, BuilderInterface $negative, $negativeBoost)
+    {
+        $this->positive = $positive;
+        $this->negative = $negative;
+        $this->negativeBoost = $negativeBoost;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getType()
+    {
+        return 'boosting';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toArray()
+    {
+        $query = [
+            'positive' => [$this->positive->getType() => $this->positive->toArray()],
+            'negative' => [$this->negative->getType() => $this->negative->toArray()],
+            'negative_boost' => $this->negativeBoost,
+        ];
+
+        return $query;
+    }
+}

Query/DisMaxQuery.php

+<?php
+
+/*
+ * This file is part of the ONGR package.
+ *
+ * (c) NFQ Technologies UAB <info@nfq.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace ONGR\ElasticsearchBundle\DSL\Query;
+
+use ONGR\ElasticsearchBundle\DSL\BuilderInterface;
+use ONGR\ElasticsearchBundle\DSL\ParametersTrait;
+
+/**
+ * Elasticsearch dis max query class.
+ */
+class DisMaxQuery implements BuilderInterface
+{
+    use ParametersTrait;
+
+    /**
+     * @var BuilderInterface[]
+     */
+    private $queries = [];
+
+    /**
+     * Initializes Dis Max query.
+     *
+     * @param BuilderInterface[] $queries
+     * @param array              $parameters
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function __construct(array $queries = [], array $parameters = [])
+    {
+        foreach ($queries as $query) {
+            if ($query instanceof BuilderInterface) {
+                $this->queries[] = $query;
+            } else {
+                throw new \InvalidArgumentException('Arguments must be instance of BuilderInterface');
+            }
+        }
+        $this->setParameters($parameters);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getType()
+    {
+        return 'dis_max';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toArray()
+    {
+        foreach ($this->queries as $type) {
+            $query['queries'][] = [$type->getType() => $type->toArray()];
+        }
+        $output = $this->processArray($query);
+
+        return $output;
+    }
+}

Query/PrefixQuery.php

+<?php
+
+/*
+ * This file is part of the ONGR package.
+ *
+ * (c) NFQ Technologies UAB <info@nfq.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace ONGR\ElasticsearchBundle\DSL\Query;
+
+use ONGR\ElasticsearchBundle\DSL\BuilderInterface;
+use ONGR\ElasticsearchBundle\DSL\ParametersTrait;
+
+/**
+ * Represents Elasticsearch "prefix" query.
+ */
+class PrefixQuery implements BuilderInterface
+{
+    use ParametersTrait;
+
+    /**
+     * @var string
+     */
+    private $field;
+
+    /**
+     * @var string
+     */
+    private $value;
+
+    /**
+     * @param string $field      Field name.
+     * @param string $value      Value.
+     * @param array  $parameters Optional parameters.
+     */
+    public function __construct($field, $value, array $parameters = [])
+    {
+        $this->field = $field;
+        $this->value = $value;
+        $this->setParameters($parameters);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getType()
+    {
+        return 'prefix';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toArray()
+    {
+        $query = [
+            'value' => $this->value,
+        ];
+
+        $output = [
+            $this->field => $this->processArray($query),
+        ];
+
+        return $output;
+    }
+}