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// =================================================================================================
// Copyright Adobe
// Copyright 2010 Adobe
// All Rights Reserved
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// =================================================================================================
#ifndef _ValueObject_h_
#define _ValueObject_h_
#include <string.h>
#include "public/include/XMP_Environment.h" // ! XMP_Environment.h must be the first included header.
#include "public/include/XMP_Const.h"
/**
* The class ValueObject acts as a base class for the two generic classes
* TValueObject and TValueArray.
* The overall purpose of these classes is to store a single value (or array)
* of any data types and a modification state. The modification state is
* always set if the existing value has changed. It is not set if a new value
* is set that is equal to the existing value.
* If a ValueObject based instance is created or a new value is passed to an
* instance the actual value gets copied.
*
* So there're some requirements of possible data types:
* - data type needs to provide a relational operator
* - data type needs to provide an assign operator
*/
/**
* The class ValueObject is the base class for the following generic classes.
* It provids common functionality for handle the modification state.
* This class can't be used directly!
*/
class ValueObject
{
public:
virtual ~ValueObject() {}
inline bool hasChanged() const { return mDirty; }
inline void resetChanged() { mDirty = false; }
protected:
ValueObject() : mDirty(false) {}
protected:
bool mDirty;
};
/**
* The generic class TValueObject is supposed to store values of any data types.
* It is based on the class ValueObject and support modification state functionality.
* See above for the requirements of possible data types.
*/
template <class T> class TValueObject : public ValueObject
{
public:
TValueObject( const T& value ) : mValue(value) {}
~TValueObject() {}
inline const T& getValue() const { return mValue; }
inline void setValue( const T& value ) { mDirty = !( mValue == value ); mValue = value; }
private:
T mValue;
};
/**
* The generic class TArrayObject is supposed to store arrays of any data types.
* It is based on the class ValueObject and supports modification state functionality.
* See above for the requirements of possible data types.
*/
template <class T> class TArrayObject : public ValueObject
{
public:
TArrayObject( const T* buffer, XMP_Uns32 bufferSize );
~TArrayObject();
inline const T* getArray( XMP_Uns32& outSize ) const { outSize = mSize; return mArray; }
void setArray( const T* buffer, XMP_Uns32 numElements);
private:
T* mArray;
XMP_Uns32 mSize;
};
template<class T> inline TArrayObject<T>::TArrayObject( const T* buffer, XMP_Uns32 bufferSize )
: mArray(NULL), mSize(0)
{
this->setArray( buffer, bufferSize );
mDirty = false;
}
template<class T> inline TArrayObject<T>::~TArrayObject()
{
if( mArray != NULL )
{
delete[] mArray;
}
}
template<class T> inline void TArrayObject<T>::setArray( const T* buffer, XMP_Uns32 numElements )
{
if( buffer != NULL && numElements > 0 )
{
bool doSet = true;
if( mArray != NULL && mSize == numElements )
{
doSet = false;
for( size_t i = 0; i < mSize; i++ ) {
if ( mArray[i] != buffer[i] ) {
doSet = true;
break;
}
}
}
if( doSet )
{
if( mArray != NULL )
{
delete[] mArray;
}
mArray = new T[numElements];
mSize = numElements;
for ( size_t i = 0; i < mSize; i++ ) {
mArray[i] = buffer[i];
}
mDirty = true;
}
}
else
{
mDirty = ( mArray != NULL );
if( mArray != NULL )
{
delete[] mArray;
}
mArray = NULL;
mSize = 0;
}
}
#endif
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