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39
40//
41// W A R N I N G
42// -------------
43//
44// This file is not part of the Qt API. It exists purely as an
45// implementation detail. This header file may change from version to
46// version without notice, or even be removed.
47//
48// We mean it.
49
50#ifndef QPatternist_ResourceDelegator_p_H
51#define QPatternist_ResourceDelegator_p_H
52
53#include <QSet>
54#include <QUrl>
55
56#include <private/qdeviceresourceloader_p.h>
57
58QT_BEGIN_NAMESPACE
59
60namespace QPatternist
61{
62 /**
63 * @short Delegates to another ResourceLoader, but in case a URI is in an
64 * exception list, it delegates to a different loader.
65 *
66 * This is used for handling device variables, since when a device variable
67 * is rebound, a resource loader needs to carry that binding, while the
68 * resource loader for the other query remains as is.
69 *
70 * @since 4.5
71 * @author Frans Englich <frans.englich@nokia.com>
72 */
73 class ResourceDelegator : public DeviceResourceLoader
74 {
75 public:
76 ResourceDelegator(const QSet<QUrl> &needsOverride,
77 const ResourceLoader::Ptr &parentLoader,
78 const ResourceLoader::Ptr &forDeviceLoader) : m_needsOverride(needsOverride)
79 , m_parentLoader(parentLoader)
80 , m_forDeviceLoader(forDeviceLoader)
81
82 {
83 Q_ASSERT(m_parentLoader);
84 }
85
86 bool isUnparsedTextAvailable(const QUrl &uri,
87 const QString &encoding) override;
88 ItemType::Ptr announceUnparsedText(const QUrl &uri) override;
89 Item openUnparsedText(const QUrl &uri,
90 const QString &encoding,
91 const ReportContext::Ptr &context,
92 const SourceLocationReflection *const where) override;
93 Item openDocument(const QUrl &uri,
94 const ReportContext::Ptr &context) override;
95 SequenceType::Ptr announceDocument(const QUrl &uri, const Usage usageHint) override;
96 bool isDocumentAvailable(const QUrl &uri) override;
97 Item::Iterator::Ptr openCollection(const QUrl &uri) override;
98 SequenceType::Ptr announceCollection(const QUrl &uri) override;
99
100 /**
101 * Returns the union of the deviceURIs() that ResourceDelegator's two
102 * resource loaders has.
103 */
104 QSet<QUrl> deviceURIs() const override;
105
106 private:
107 const QSet<QUrl> m_needsOverride;
108 const ResourceLoader::Ptr m_parentLoader;
109 const ResourceDelegator::Ptr m_forDeviceLoader;
110 };
111}
112
113QT_END_NAMESPACE
114
115#endif
116

source code of qtxmlpatterns/src/xmlpatterns/api/qresourcedelegator_p.h