[增添]添加了datasource的setting数据库以及默认值

vendor/doctrine/dbal/src/Driver/IBMDB2/DataSourceName.php

@@ -0,0 +1,84 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\DBAL\Driver\IBMDB2;
+
+use SensitiveParameter;
+
+use function implode;
+use function sprintf;
+use function strpos;
+
+/**
+ * IBM DB2 DSN
+ */
+final class DataSourceName
+{
+    private string $string;
+
+    private function __construct(
+        #[SensitiveParameter]
+        string $string
+    ) {
+        $this->string = $string;
+    }
+
+    public function toString(): string
+    {
+        return $this->string;
+    }
+
+    /**
+     * Creates the object from an array representation
+     *
+     * @param array<string,mixed> $params
+     */
+    public static function fromArray(
+        #[SensitiveParameter]
+        array $params
+    ): self {
+        $chunks = [];
+
+        foreach ($params as $key => $value) {
+            $chunks[] = sprintf('%s=%s', $key, $value);
+        }
+
+        return new self(implode(';', $chunks));
+    }
+
+    /**
+     * Creates the object from the given DBAL connection parameters.
+     *
+     * @param array<string,mixed> $params
+     */
+    public static function fromConnectionParameters(
+        #[SensitiveParameter]
+        array $params
+    ): self {
+        if (isset($params['dbname']) && strpos($params['dbname'], '=') !== false) {
+            return new self($params['dbname']);
+        }
+
+        $dsnParams = [];
+
+        foreach (
+            [
+                'host'     => 'HOSTNAME',
+                'port'     => 'PORT',
+                'protocol' => 'PROTOCOL',
+                'dbname'   => 'DATABASE',
+                'user'     => 'UID',
+                'password' => 'PWD',
+            ] as $dbalParam => $dsnParam
+        ) {
+            if (! isset($params[$dbalParam])) {
+                continue;
+            }
+
+            $dsnParams[$dsnParam] = $params[$dbalParam];
+        }
+
+        return self::fromArray($dsnParams);
+    }
+}