/*

 * Copyright (C) 2008, 2009 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.

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 APPLE OR ITS CONTRIBUTORS 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 SourceProvider_h

#define SourceProvider_h

#include "UString.h"

#include <wtf/RefCounted.h>

namespace JSC {

    class SourceProvider : public RefCounted<SourceProvider> {

    public:

        SourceProvider(const UString& url)

            : m_url(url)

            , m_validated(false)

        {

        }

        virtual ~SourceProvider() { }

        virtual UString getRange(int start, int end) const = 0;

        virtual const UChar* data() const = 0;

        virtual int length() const = 0;

        const UString& url() { return m_url; }

        intptr_t asID() { return reinterpret_cast<intptr_t>(this); }

        bool isValid() const { return m_validated; }

        void setValid() { m_validated = true; }

    private:

        UString m_url;

        bool m_validated;

    };

    class UStringSourceProvider : public SourceProvider {

    public:

        static PassRefPtr<UStringSourceProvider> create(const UString& source, const UString& url)

        {

            return adoptRef(new UStringSourceProvider(source, url));

        }

        UString getRange(int start, int end) const

        {

            return m_source.substr(start, end - start);

        }

        const UChar* data() const { return m_source.data(); }

        int length() const { return m_source.size(); }

    private:

        UStringSourceProvider(const UString& source, const UString& url)

            : SourceProvider(url)

            , m_source(source)

        {

        }

        UString m_source;

    };

} // namespace JSC

#endif // SourceProvider_h