diff --git a/package.cpp b/package.cpp
index 6ceeb2452..18b8308f7 100644
--- a/package.cpp
+++ b/package.cpp
@@ -62,6 +62,29 @@ Package::~Package()
 {
 }
 
+bool Package::isValid()
+{
+    if (!d->valid) {
+        return false;
+    }
+
+    foreach (const QString& dir, d->structure.requiredDirectories()) {
+        if (QFile::exists(d->basePath + "/" + dir)) {
+            d->valid = false;
+            return false;
+        }
+    }
+
+    foreach (const QString& file, d->structure.requiredFiles()) {
+        if (QFile::exists(d->basePath + "/" + file)) {
+            d->valid = false;
+            return false;
+        }
+    }
+
+    return true;
+}
+
 QString Package::filePath(const char* fileType, const QString& filename)
 {
     if (!d->valid) {
@@ -69,7 +92,12 @@ QString Package::filePath(const char* fileType, const QString& filename)
     }
 
     QString path = d->structure.path(fileType);
-    if (!path.isEmpty() && !filename.isEmpty()) {
+
+    if (path.isEmpty()) {
+        return QString();
+    }
+
+    if (!filename.isEmpty()) {
         path.prepend(d->basePath);
         path.append("/").append(filename);
     }
diff --git a/package.h b/package.h
index 983d77063..95225231c 100644
--- a/package.h
+++ b/package.h
@@ -47,6 +47,12 @@ class PLASMA_EXPORT Package
                 const PackageStructure& structure);
         ~Package();
 
+        /**
+         * @return true if all the required components as defined in
+         * the PackageStructure exist
+         **/
+        bool isValid();
+
         /**
          * Get the path to a given file.
          *
@@ -94,6 +100,7 @@ class PLASMA_EXPORT Package
         static bool installPackage(const QString& package, const QString& packageRoot);
 
     private:
+        Q_DISABLE_COPY(Package)
         class Private;
         Private * const d;
 };
diff --git a/packagestructure.cpp b/packagestructure.cpp
index 4f9daf43e..209d6004f 100644
--- a/packagestructure.cpp
+++ b/packagestructure.cpp
@@ -33,6 +33,15 @@ class ContentStructure
         {
         }
 
+        ContentStructure(const ContentStructure& other)
+        {
+            path = other.path;
+            name = other.name;
+            mimetypes = other.mimetypes;
+            directory = other.directory;
+            required = other.required;
+        }
+
         QString path;
         QString name;
         QStringList mimetypes;
@@ -93,7 +102,35 @@ QStringList PackageStructure::directories()
     return dirs;
 }
 
+QStringList PackageStructure::requiredDirectories()
+{
+    QStringList dirs;
+    QHash<const char*, ContentStructure>::const_iterator it = d->contents.constBegin();
+    while (it != d->contents.constEnd()) {
+        if (it.value().directory &&
+            it.value().required) {
+            dirs << it.value().path;
+        }
+        ++it;
+    }
+    return dirs;
+}
+
 QStringList PackageStructure::files()
+{
+    QStringList files;
+    QHash<const char*, ContentStructure>::const_iterator it = d->contents.constBegin();
+    while (it != d->contents.constEnd()) {
+        if (!it.value().directory &&
+            it.value().required) {
+            files << it.value().path;
+        }
+        ++it;
+    }
+    return files;
+}
+
+QStringList PackageStructure::requiredFiles()
 {
     QStringList files;
     QHash<const char*, ContentStructure>::const_iterator it = d->contents.constBegin();
diff --git a/packagestructure.h b/packagestructure.h
index b17cfba7f..c535f94f8 100644
--- a/packagestructure.h
+++ b/packagestructure.h
@@ -77,11 +77,21 @@ public:
      **/
     QStringList directories();
 
+    /**
+     * The required directories defined for this package
+     **/
+    QStringList requiredDirectories();
+
     /**
      * The individual files defined for this package
      **/
     QStringList files();
 
+    /**
+     * The individual required files defined for this package
+     **/
+    QStringList requiredFiles();
+
     /**
      * Adds a directory to the structure of the package. It is added as
      * a not-required element with no associated mimetypes.