use exceptins for error handling

composer.json

@@ -10,13 +10,12 @@
         }
     ],
     "require": {
-        "php": "^5.4||^7.0",
+        "php": "^5.4|^7.0",
         "goetas-webservices/xsd-reader": "^0.2",
         "symfony/event-dispatcher" : "^2.2"
     },
     "require-dev" : {
         "phpunit/phpunit" : "^4.8|^5.0",
-        "sami/sami" : "~2.0",
         "jmikola/wildcard-event-dispatcher": "~1.0"
     },
     "autoload": {

src/DefinitionsReader.php

@@ -29,6 +29,7 @@
 use GoetasWebservices\XML\WSDLReader\Wsdl\PortType\Param;
 use GoetasWebservices\XML\WSDLReader\Wsdl\Service;
 use GoetasWebservices\XML\WSDLReader\Wsdl\Service\Port;
+use GoetasWebservices\XML\XSDReader\Exception\IOException;
 use GoetasWebservices\XML\XSDReader\Schema\Schema;
 use GoetasWebservices\XML\XSDReader\SchemaReader;
 use GoetasWebservices\XML\XSDReader\Utils\UrlUtils;
@@ -509,8 +510,11 @@ public function readFile($file)
     private function getDOM($file)
     {
         $xml = new DOMDocument('1.0', 'UTF-8');
-        if (!$xml->load($file)) {
+        if (!$xml->load($file, LIBXML_NONET)) {
+            print_r(libxml_get_errors());
+            die();
             throw new IOException("Can't load the file $file");
+
         }
         return $xml;
     }

src/Exception/OperationNotFoundException.php

@@ -0,0 +1,7 @@
+<?php
+namespace GoetasWebservices\XML\WSDLReader\Exception;
+
+class OperationNotFoundException extends \Exception
+{
+
+}

src/Exception/PartNotFoundException.php

@@ -0,0 +1,7 @@
+<?php
+namespace GoetasWebservices\XML\WSDLReader\Exception;
+
+class PartNotFoundException extends \Exception
+{
+
+}

src/Exception/PortNotFoundException.php

@@ -0,0 +1,7 @@
+<?php
+namespace GoetasWebservices\XML\WSDLReader\Exception;
+
+class PortNotFoundException extends \Exception
+{
+
+}

src/Exception/ServiceNotFoundException.php

@@ -0,0 +1,7 @@
+<?php
+namespace GoetasWebservices\XML\WSDLReader\Exception;
+
+class ServiceNotFoundException extends \Exception
+{
+
+}

src/Wsdl/Definitions.php

@@ -1,6 +1,7 @@
 <?php
 namespace GoetasWebservices\XML\WSDLReader\Wsdl;
 
+use GoetasWebservices\XML\WSDLReader\Exception\ServiceNotFoundException;
 use GoetasWebservices\XML\XSDReader\Schema\Schema;
 
 /**
@@ -225,6 +226,7 @@ public function getService($name)
         if (isset($this->service[$name])) {
             return $this->service[$name];
         }
+        throw new ServiceNotFoundException("The service named $name can not be found inside $this->name");
     }
 
     /**

src/Wsdl/Message.php

@@ -1,5 +1,6 @@
 <?php
 namespace GoetasWebservices\XML\WSDLReader\Wsdl;
+use GoetasWebservices\XML\WSDLReader\Exception\PartNotFoundException;
 
 /**
  * XSD Type: tMessage
@@ -69,7 +70,10 @@ public function getParts()
      */
     public function getPart($name)
     {
-        return $this->part[$name];
+        if (isset($this->part[$name])) {
+            return $this->part[$name];
+        }
+        throw new PartNotFoundException("The part named $name can not be found inside $this->name message");
     }
 
 }

src/Wsdl/PortType.php

@@ -1,5 +1,6 @@
 <?php
 namespace GoetasWebservices\XML\WSDLReader\Wsdl;
+use GoetasWebservices\XML\WSDLReader\Exception\OperationNotFoundException;
 
 /**
  * XSD Type: tPortType
@@ -56,7 +57,10 @@ public function addOperation(\GoetasWebservices\XML\WSDLReader\Wsdl\PortType\Ope
      */
     public function getOperation($name)
     {
-        return $this->operation[$name];
+        if (isset($this->operation[$name])) {
+            return $this->operation[$name];
+        }
+        throw new OperationNotFoundException("The operation named $name can not be found inside $this->name port type");
     }
 
     /**

src/Wsdl/Service.php

@@ -1,5 +1,6 @@
 <?php
 namespace GoetasWebservices\XML\WSDLReader\Wsdl;
+use GoetasWebservices\XML\WSDLReader\Exception\PortNotFoundException;
 
 /**
  * XSD Type: tService
@@ -54,7 +55,10 @@ public function addPort(\GoetasWebservices\XML\WSDLReader\Wsdl\Service\Port $por
 
     public function getPort($name)
     {
-        return $this->port[$name];
+        if (isset($this->port[$name])){
+            return $this->port[$name];
+        }
+        throw new PortNotFoundException("The port named $name can not be found inside $this->name");
     }
 
     /**

src/Wsdl/Service/Port.php

@@ -31,6 +31,11 @@ public function __construct(Service $service, $name)
         $this->service = $service;
     }
 
+    public function getService()
+    {
+        return $this->service;
+    }
+
     /**
      * @return string
      */