Issue #2147817 by chx: Migrate: add a static map process plugin.

core/modules/migrate/lib/Drupal/migrate/Plugin/migrate/process/StaticMap.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\migrate\Plugin\migrate\process\MultipleColumnsMap.
+ */
+
+namespace Drupal\migrate\Plugin\migrate\process;
+
+use Drupal\Component\Utility\NestedArray;
+use Drupal\Core\Plugin\PluginBase;
+use Drupal\migrate\MigrateException;
+use Drupal\migrate\MigrateExecutable;
+use Drupal\migrate\Plugin\MigrateProcessInterface;
+use Drupal\migrate\Row;
+
+/**
+ * This plugin changes the current value based on a static lookup map.
+ *
+ * @see https://drupal.org/node/2143521
+ *
+ * @PluginId("static_map")
+ */
+class StaticMap extends PluginBase implements MigrateProcessInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function transform($value, MigrateExecutable $migrate_executable, Row $row, $destination_property) {
+    if (!is_array($value)) {
+      $value = array($value);
+    }
+    if (!$value) {
+      throw new MigrateException('Can not lookup without a value.');
+    }
+    $new_value = NestedArray::getValue($this->configuration['map'], $value, $key_exists);
+    if (!$key_exists) {
+      throw new MigrateException('Lookup failed.');
+    }
+    return $new_value;
+  }
+
+}
+

core/modules/migrate/tests/Drupal/migrate/Tests/process/StaticMapTest.php

+<?php
+/**
+ * @file
+ * Contains \Drupal\migrate\Tests\process\StaticMapTest.
+ */
+
+namespace Drupal\migrate\Tests\process;
+
+use Drupal\migrate\Plugin\migrate\process\StaticMap;
+
+/**
+ * @group migrate
+ * @group Drupal
+ */
+class StaticMapTest extends MigrateProcessTestCase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getInfo() {
+    return array(
+      'name' => 'Map process plugin',
+      'description' => 'Tests the map process plugin.',
+      'group' => 'Migrate',
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function setUp() {
+    $this->row = $this->getMockBuilder('Drupal\migrate\Row')
+      ->disableOriginalConstructor()
+      ->getMock();
+    $this->migrateExecutable = $this->getMockBuilder('Drupal\migrate\MigrateExecutable')
+      ->disableOriginalConstructor()
+      ->getMock();
+    $configuration['map']['foo']['bar'] = 'baz';
+    $this->plugin = new StaticMap($configuration, 'map', array());
+    parent::setUp();
+  }
+
+  /**
+   * Tests map when the source is a string.
+   */
+  function testMapWithSourceString() {
+    $value = $this->plugin->transform('foo', $this->migrateExecutable, $this->row, 'destinationproperty');
+    $this->assertSame($value, array('bar' => 'baz'));
+  }
+
+  /**
+   * Tests map when the source is a list.
+   */
+  function testMapWithSourceList() {
+    $value = $this->plugin->transform(array('foo', 'bar'), $this->migrateExecutable, $this->row, 'destinationproperty');
+    $this->assertSame($value, 'baz');
+  }
+
+  /**
+   * Tests when the source is empty.
+   *
+   * @expectedException \Drupal\migrate\MigrateException
+   */
+  function testMapwithEmptySource() {
+    $this->plugin->transform(array(), $this->migrateExecutable, $this->row, 'destinationproperty');
+  }
+
+  /**
+   * Tests when the source is invalid.
+   *
+   * @expectedException \Drupal\migrate\MigrateException
+   */
+  function testMapwithInvalidSource() {
+    $this->plugin->transform(array('bar'), $this->migrateExecutable, $this->row, 'destinationproperty');
+  }
+
+}