Add com.amazon.aws.lambda.Credentials class

Author: thekid

src/main/php/com/amazon/aws/lambda/Credentials.class.php

@@ -0,0 +1,64 @@
+<?php namespace com\amazon\aws\lambda;
+
+use lang\Value;
+use util\Secret;
+
+class Credentials implements Value {
+  private $accessKey, $secretKey, $sessionToken;
+
+  /**
+   * Creates a new instance
+   *
+   * @param  string $accessKey
+   * @param  string|util.Secret $secretKey
+   * @param  ?string $sessionToken
+   */
+  public function __construct($accessKey, $secretKey, $sessionToken= null) {
+    $this->accessKey= $accessKey;
+    $this->secretKey= $secretKey instanceof Secret ? $secretKey : new Secret($secretKey);
+    $this->sessionToken= $sessionToken;
+  }
+
+  /** @return string */
+  public function accessKey() { return $this->accessKey; }
+
+  /** @return util.Secret */
+  public function secretKey() { return $this->secretKey; }
+
+  /** @return ?string */
+  public function sessionToken() { return $this->sessionToken; }
+
+  /** @return string */
+  public function hashCode() {
+    return 'C'.sha1($this->accessKey.$this->secretKey->reveal().$this->sessionToken);
+  }
+
+  /** @return string */
+  public function toString() {
+    return sprintf(
+      '%s(accessKey: %s, secretKey: %s%s)',
+      nameof($this),
+      $this->accessKey,
+      str_repeat('*', strlen($this->secretKey->reveal())),
+      null === $this->sessionToken ? '' : ', sessionToken: '.$this->sessionToken
+    );
+  }
+
+  /**
+   * Comparison
+   *
+   * @param  var $value
+   * @return int
+   */
+  public function compareTo($value) {
+    if (!($value instanceof self)) return 1;
+
+    $r= $this->accessKey <=> $value->accessKey;
+    if (0 !== $r) return $r;
+
+    $r= $this->sessionToken <=> $value->sessionToken;
+    if (0 !== $r) return $r;
+
+    return $this->secretKey->equals($value->secretKey) ? 0 : 1;
+  }
+}