CachedMetadata support for ServiceWorker script.

Source/modules/serviceworkers/ServiceWorkerScriptCachedMetadataHandler.cpp

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+

[tkent, 2015/02/18 04:47:20]

nit: We usually add no blank line between configh and header-for-this-class.h

[horo, 2015/02/18 04:56:58]

Done.

+#include "modules/serviceworkers/ServiceWorkerScriptCachedMetadataHandler.h"
+
+#include "core/fetch/CachedMetadata.h"
+#include "core/workers/WorkerGlobalScope.h"
+#include "modules/serviceworkers/ServiceWorkerGlobalScopeClient.h"
+
+namespace blink {
+
+ServiceWorkerScriptCachedMetadataHandler::ServiceWorkerScriptCachedMetadataHandler(WorkerGlobalScope* workerGlobalScope, const KURL& scriptURL, const Vector<char>* metaData)
+    : m_workerGlobalScope(workerGlobalScope)
+    , m_scriptURL(scriptURL)
+{
+    if (metaData)
+        m_cachedMetadata = CachedMetadata::deserialize(metaData->data(), metaData->size());
+}
+
+ServiceWorkerScriptCachedMetadataHandler::~ServiceWorkerScriptCachedMetadataHandler()
+{
+}
+
+void ServiceWorkerScriptCachedMetadataHandler::setCachedMetadata(unsigned dataTypeID, const char* data, size_t size, CacheType type)
+{
+    if (type != SendToPlatform)
+        return;
+    m_cachedMetadata = CachedMetadata::create(dataTypeID, data, size);
+    const Vector<char>& serializedData = m_cachedMetadata->serialize();
+    ServiceWorkerGlobalScopeClient::from(m_workerGlobalScope)->setCachedMetadata(m_scriptURL, serializedData.data(), serializedData.size());
+}
+
+void ServiceWorkerScriptCachedMetadataHandler::clearCachedMetadata(CacheType type)
+{
+    if (type != SendToPlatform)
+        return;
+    m_cachedMetadata = nullptr;
+    ServiceWorkerGlobalScopeClient::from(m_workerGlobalScope)->clearCachedMetadata(m_scriptURL);
+}
+
+CachedMetadata* ServiceWorkerScriptCachedMetadataHandler::cachedMetadata(unsigned dataTypeID) const
+{
+    if (!m_cachedMetadata || m_cachedMetadata->dataTypeID() != dataTypeID)
+        return nullptr;
+    return m_cachedMetadata.get();
+}
+
+String ServiceWorkerScriptCachedMetadataHandler::encoding() const
+{
+    return "";

[tkent, 2015/02/18 04:47:20]

nit: Use emptyString() to avoid unnecessary String creation.

[horo, 2015/02/18 04:56:58]

Done.

+}
+
+} // namespace blink