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/*
* Copyright 2005 Frerich Raabe <raabe@kde.org>
* Copyright (C) 2006, 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef XPathValue_h
#define XPathValue_h
#include "XPathNodeSet.h"
namespace WebCore {
namespace XPath {
class Value {
public:
enum Type { NodeSetValue, BooleanValue, NumberValue, StringValue };
Value(bool value) : m_type(BooleanValue), m_bool(value) { }
Value(unsigned value) : m_type(NumberValue), m_number(value) { }
Value(double value) : m_type(NumberValue), m_number(value) { }
Value(const String& value) : m_type(StringValue), m_data(Data::create(value)) { }
Value(const char* value) : m_type(StringValue), m_data(Data::create(value)) { }
explicit Value(NodeSet&& value)
: m_type(NodeSetValue), m_data(Data::create(WTFMove(value)))
{ }
explicit Value(Node* value)
: m_type(NodeSetValue), m_data(Data::create(value))
{ }
explicit Value(RefPtr<Node>&& value)
: m_type(NodeSetValue), m_data(Data::create(WTFMove(value)))
{ }
Type type() const { return m_type; }
bool isNodeSet() const { return m_type == NodeSetValue; }
bool isBoolean() const { return m_type == BooleanValue; }
bool isNumber() const { return m_type == NumberValue; }
bool isString() const { return m_type == StringValue; }
const NodeSet& toNodeSet() const;
bool toBoolean() const;
double toNumber() const;
String toString() const;
// Note that the NodeSet is shared with other Values that this one was copied from or that are copies of this one.
NodeSet& modifiableNodeSet();
private:
// This constructor creates ambiguity so that we don't accidentally call the boolean overload for pointer types.
Value(void*) = delete;
struct Data : public RefCounted<Data> {
static Ref<Data> create() { return adoptRef(*new Data); }
static Ref<Data> create(const String& string) { return adoptRef(*new Data(string)); }
static Ref<Data> create(NodeSet&& nodeSet) { return adoptRef(*new Data(WTFMove(nodeSet))); }
static Ref<Data> create(RefPtr<Node>&& node) { return adoptRef(*new Data(WTFMove(node))); }
String string;
NodeSet nodeSet;
private:
Data() { }
explicit Data(const String& string)
: string(string)
{ }
explicit Data(NodeSet&& nodeSet)
: nodeSet(WTFMove(nodeSet))
{ }
explicit Data(RefPtr<Node>&& node)
: nodeSet(WTFMove(node))
{ }
};
Type m_type;
bool m_bool;
double m_number;
RefPtr<Data> m_data;
};
}
}
#endif // XPath_Value_H
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