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Generalized Xmpdatum::operator=.

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This commit is contained in:
Andreas Huggel 2007-09-30 14:23:19 +00:00
parent dbe900dde7
commit ce170e093b
4 changed files with 70 additions and 19 deletions
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8
src/xmp.cpp
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@ -246,14 +246,6 @@ namespace Exiv2 {
return 0;
}
Xmpdatum& Xmpdatum::operator=(const uint16_t& value)
{
XmpTextValue::AutoPtr v(new XmpTextValue);
v->read(toString(value));
p_->value_ = v;
return *this;
}
Xmpdatum& Xmpdatum::operator=(const std::string& value)
{
setValue(value);

45
src/xmp.hpp
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@ -80,17 +80,28 @@ namespace Exiv2 {
//! Assignment operator
Xmpdatum& operator=(const Xmpdatum& rhs);
/*!
@brief Assign \em value to the %Xmpdatum. The type of the new Value
is set to XmpTextValue.
*/
Xmpdatum& operator=(const uint16_t& value);
/*!
@brief Assign \em value to the %Xmpdatum.
@brief Assign std::string \em value to the %Xmpdatum.
Calls setValue(const std::string&).
*/
Xmpdatum& operator=(const std::string& value);
/*!
@brief Assign \em value to the %Xmpdatum.
@brief Assign const char* \em value to the %Xmpdatum.
Calls operator=(const std::string&).
*/
Xmpdatum& operator=(const char* value);
/*!
@brief Assign a boolean \em value to the %Xmpdatum.
Translates the value to a string "true" or "false".
*/
Xmpdatum& operator=(const bool& value);
/*!
@brief Assign a \em value of any type with an output operator
to the %Xmpdatum. Calls operator=(const std::string&).
*/
template<typename T>
Xmpdatum& operator=(const T& value);
/*!
@brief Assign Value \em value to the %Xmpdatum.
Calls setValue(const Value*).
*/
Xmpdatum& operator=(const Value& value);
@ -311,6 +322,26 @@ namespace Exiv2 {
}; // class XmpParser
// *****************************************************************************
// free functions, template and inline definitions
inline Xmpdatum& Xmpdatum::operator=(const char* value)
{
return Xmpdatum::operator=(std::string(value));
}
inline Xmpdatum& Xmpdatum::operator=(const bool& value)
{
return operator=(value ? "true" : "false");
}
template<typename T>
Xmpdatum& Xmpdatum::operator=(const T& value)
{
setValue(Exiv2::toString(value));
return *this;
}
} // namespace Exiv2
#endif // #ifndef XMP_HPP_

22
src/xmpsample.cpp
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@ -15,13 +15,27 @@ try {
Exiv2::XmpData xmpData;
// -------------------------------------------------------------------------
// Teaser: The quickest way to add simple XMP properties using Exiv2
// Teaser: Setting XMP properties doesn't get much easier than this:
xmpData["Xmp.dc.source"] = "xmpsample.cpp"; // a simple text value
xmpData["Xmp.dc.subject"] = "Palmtree"; // an array item
xmpData["Xmp.dc.subject"] = "Rubbertree"; // add a 2nd array item
xmpData["Xmp.dc.title"] = "lang=en-US Beach"; // a language alternative
// -------------------------------------------------------------------------
// Any properties can be set provided the namespace is known. Values of any
// type can be assigned to an Xmpdatum (requires an output operator). The
// default XMP value type for unknown properties is a simple text value.
xmpData["Xmp.dc.one"] = -1;
xmpData["Xmp.dc.two"] = 3.1415;
xmpData["Xmp.dc.three"] = Exiv2::Rational(5, 7);
xmpData["Xmp.dc.four"] = uint16_t(255);
xmpData["Xmp.dc.five"] = int32_t(256);
xmpData["Xmp.dc.six"] = false;
Exiv2::XmpTextValue val("Seven");
xmpData["Xmp.dc.seven"] = val;
// -------------------------------------------------------------------------
// Exiv2 has specialized values for simple XMP properties, arrays of simple
// properties and language alternatives.
@ -52,7 +66,7 @@ try {
// -------------------------------------------------------------------------
// There are no specialized values for structures, qualifiers and nested
// types. However, these can be added by using a XmpTextValue and a path as
// types. However, these can be added by using an XmpTextValue and a path as
// the key.
// Add a structure
@ -74,11 +88,11 @@ try {
xmpData.add(Exiv2::XmpKey("Xmp.dc.creator[2]/?ns:role"), &tv);
// Add an array of structures
tv.read("");
tv.read(""); // Clear the value
tv.setXmpArrayType(Exiv2::XmpValue::xaBag);
xmpData.add(Exiv2::XmpKey("Xmp.xmpBJ.JobRef"), &tv); // Set the array type.
tv.setXmpArrayType(Exiv2::XmpValue::xaNone);
tv.setXmpArrayType(Exiv2::XmpValue::xaNone);
tv.read("Birtday party");
xmpData.add(Exiv2::XmpKey("Xmp.xmpBJ.JobRef[1]/stJob:name"), &tv);
tv.read("Photographer");

14
test/data/xmpparser-test.out
View File

@ -282,6 +282,13 @@ Xmp.ns1.NestedStructProp/ns2:Outer/ns2:Middle/ns2:Inner/ns2:Field2 XmpText 12
Xmp.dc.source XmpText 13 xmpsample.cpp
Xmp.dc.subject XmpBag 2 Palmtree, Rubbertree
Xmp.dc.title LangAlt 1 lang="en-US" Beach
Xmp.dc.one XmpText 2 -1
Xmp.dc.two XmpText 6 3.1415
Xmp.dc.three XmpText 3 5/7
Xmp.dc.four XmpText 3 255
Xmp.dc.five XmpText 3 256
Xmp.dc.six XmpText 5 false
Xmp.dc.seven XmpText 5 Seven
Xmp.dc.format XmpText 10 image/jpeg
Xmp.dc.creator XmpSeq 3 1) The first creator, 2) The second creator, 3) And another one
Xmp.dc.description LangAlt 2 lang="de-DE" Hallo, Welt, lang="x-default" Hello, World
@ -307,6 +314,13 @@ Xmp.xmpBJ.JobRef[2]/stJob:role XmpText 8 Best man
xmlns:xapBJ="http://ns.adobe.com/xap/1.0/bj/"
xmlns:stJob="http://ns.adobe.com/xap/1.0/sType/Job#"
dc:source="xmpsample.cpp"
dc:one="-1"
dc:two="3.1415"
dc:three="5/7"
dc:four="255"
dc:five="256"
dc:six="false"
dc:seven="Seven"
dc:format="image/jpeg">
<dc:subject>
<rdf:Bag>