Added covenience functions (#11)

* Removed duplicated literal "Empty array name"

* Removed XMPMeta interface and merged this with the real class.

* Removed duplicated literal "Empty property name"

* Default value for PropertyOptions restored

* @Suppress("TooManyFunctions")

* Moved private methods to better places

* Added convenience methods for common properties

* ReadXmpTest.kt & WriteXmpTest.kt use convenience methods to get unit test coverage on that.

* Removed sub package "impl"

* XMPMeta.kt: Style formattings

* Removed XMPIterator.kt interface as there is only one implementation.

* Merged XMPSchemaRegistry.kt & XMPSchemaRegistryImpl.kt

* Refactor XMPRDFWriter: Pass StringBuilder into the methods

* Refactor XMPRDFWriter: Inlined write methods

* Refactor XMPRDFWriter: Pass XMPMeta into serialize()

* Refactor XMPRDFWriter: Pass SerializeOptions into serialize()

* XMPRDFWriter is now a singleton object to avoid this instance creation

README.md

@@ -15,7 +15,7 @@ It's part of [Ashampoo Photos](https://ashampoo.com/photos).
 ## Installation
 
 ```
-implementation("com.ashampoo:xmpcore:0.1.7")
+implementation("com.ashampoo:xmpcore:0.2")
 ```
 
 ## How to use

src/commonMain/kotlin/com/ashampoo/xmp/impl/DomParser.kt → src/commonMain/kotlin/com/ashampoo/xmp/DomParser.kt

@@ -1,7 +1,5 @@
-package com.ashampoo.xmp.impl
+package com.ashampoo.xmp
 
-import com.ashampoo.xmp.XMPError
-import com.ashampoo.xmp.XMPException
 import nl.adaptivity.xmlutil.DomWriter
 import nl.adaptivity.xmlutil.EventType
 import nl.adaptivity.xmlutil.XmlStreaming

src/commonMain/kotlin/com/ashampoo/xmp/impl/QName.kt → src/commonMain/kotlin/com/ashampoo/xmp/QName.kt

@@ -6,7 +6,7 @@
 // NOTICE:  Adobe permits you to use, modify, and distribute this file in accordance with the terms
 // of the Adobe license agreement accompanying it.
 // =================================================================================================
-package com.ashampoo.xmp.impl
+package com.ashampoo.xmp
 
 class QName {
 

src/commonMain/kotlin/com/ashampoo/xmp/impl/Utils.kt → src/commonMain/kotlin/com/ashampoo/xmp/Utils.kt

@@ -6,9 +6,7 @@
 // NOTICE:  Adobe permits you to use, modify, and distribute this file in accordance with the terms
 // of the Adobe license agreement accompanying it.
 // =================================================================================================
-package com.ashampoo.xmp.impl
-
-import com.ashampoo.xmp.XMPConst
+package com.ashampoo.xmp
 
 /**
  * Utility functions for the XMPToolkit implementation.

src/commonMain/kotlin/com/ashampoo/xmp/XMPConst.kt

@@ -290,6 +290,8 @@ object XMPConst {
 
     const val XMP_DC_SUBJECT: String = "subject"
 
+    const val XMP_ACDSEE_KEYWORDS: String = "keywords"
+
     const val XMP_IPTC_EXT_PERSON_IN_IMAGE: String = "PersonInImage"
 
 }

src/commonMain/kotlin/com/ashampoo/xmp/XMPError.kt

@@ -10,7 +10,9 @@ package com.ashampoo.xmp
 
 object XMPError {
 
+    const val EMPTY_ARRAY_NAME_TEXT: String = "Empty array name"
     const val EMPTY_SCHEMA_TEXT: String = "Empty schema namespace URI"
+    const val EMPTY_PROPERTY_NAME_TEXT: String = "Empty property name"
     const val EMPTY_CONVERT_STRING_TEXT: String = "Empty convert-string"
 
     const val UNKNOWN: Int = 0