/// <summary>Associates an alias name with an actual name.</summary> /// <remarks> /// Associates an alias name with an actual name. /// <p> /// Define a alias mapping from one namespace/property to another. Both /// property names must be simple names. An alias can be a direct mapping, /// where the alias and actual have the same data type. It is also possible /// to map a simple alias to an item in an array. This can either be to the /// first item in the array, or to the 'x-default' item in an alt-text array. /// Multiple alias names may map to the same actual, as long as the forms /// match. It is a no-op to reregister an alias in an identical fashion. /// Note: This method is not locking because only called by registerStandardAliases /// which is only called by the constructor. /// Note2: The method is only package-private so that it can be tested with unittests /// </remarks> /// <param name="aliasNS"> /// The namespace URI for the alias. Must not be null or the empty /// string. /// </param> /// <param name="aliasProp"> /// The name of the alias. Must be a simple name, not null or the /// empty string and not a general path expression. /// </param> /// <param name="actualNS"> /// The namespace URI for the actual. Must not be null or the /// empty string. /// </param> /// <param name="actualProp"> /// The name of the actual. Must be a simple name, not null or the /// empty string and not a general path expression. /// </param> /// <param name="aliasForm"> /// Provides options for aliases for simple aliases to array /// items. This is needed to know what kind of array to create if /// set for the first time via the simple alias. Pass /// <code>XMP_NoOptions</code>, the default value, for all /// direct aliases regardless of whether the actual data type is /// an array or not (see /// <see cref="Com.Adobe.Xmp.Options.AliasOptions"/> /// ). /// </param> /// <exception cref="Com.Adobe.Xmp.XMPException">for inconsistant aliases.</exception> internal void RegisterAlias(string aliasNS, string aliasProp, string actualNS, string actualProp, AliasOptions aliasForm) { lock (this) { ParameterAsserts.AssertSchemaNS(aliasNS); ParameterAsserts.AssertPropName(aliasProp); ParameterAsserts.AssertSchemaNS(actualNS); ParameterAsserts.AssertPropName(actualProp); // Fix the alias options AliasOptions aliasOpts = aliasForm != null ? new AliasOptions(XMPNodeUtils.VerifySetOptions(aliasForm.ToPropertyOptions(), null).GetOptions()) : new AliasOptions(); if (p.Matcher(aliasProp).Find() || p.Matcher(actualProp).Find()) { throw new XMPException("Alias and actual property names must be simple", XMPErrorConstants.Badxpath); } // check if both namespaces are registered string aliasPrefix = GetNamespacePrefix(aliasNS); string actualPrefix = GetNamespacePrefix(actualNS); if (aliasPrefix == null) { throw new XMPException("Alias namespace is not registered", XMPErrorConstants.Badschema); } else { if (actualPrefix == null) { throw new XMPException("Actual namespace is not registered", XMPErrorConstants.Badschema); } } string key = aliasPrefix + aliasProp; // check if alias is already existing if (aliasMap.ContainsKey(key)) { throw new XMPException("Alias is already existing", XMPErrorConstants.Badparam); } else { if (aliasMap.ContainsKey(actualPrefix + actualProp)) { throw new XMPException("Actual property is already an alias, use the base property", XMPErrorConstants.Badparam); } } XMPAliasInfo aliasInfo = new _XMPAliasInfo_390(actualNS, actualPrefix, actualProp, aliasOpts); aliasMap.Put(key, aliasInfo); } }
/// <summary>Utility to find or create the array used by <code>SeparateArrayItems()</code>.</summary> /// <param name="schemaNS">a the namespace fo the array</param> /// <param name="arrayName">the name of the array</param> /// <param name="arrayOptions">the options for the array if newly created</param> /// <param name="xmp">the xmp object</param> /// <returns>Returns the array node.</returns> /// <exception cref="Com.Adobe.Xmp.XMPException">Forwards exceptions</exception> private static XMPNode SeparateFindCreateArray(string schemaNS, string arrayName, PropertyOptions arrayOptions, XMPMetaImpl xmp) { arrayOptions = XMPNodeUtils.VerifySetOptions(arrayOptions, null); if (!arrayOptions.IsOnlyArrayOptions()) { throw new XMPException("Options can only provide array form", XMPErrorConstants.Badoptions); } // Find the array node, make sure it is OK. Move the current children // aside, to be readded later if kept. XMPPath arrayPath = XMPPathParser.ExpandXPath(schemaNS, arrayName); XMPNode arrayNode = XMPNodeUtils.FindNode(xmp.GetRoot(), arrayPath, false, null); if (arrayNode != null) { // The array exists, make sure the form is compatible. Zero // arrayForm means take what exists. PropertyOptions arrayForm = arrayNode.GetOptions(); if (!arrayForm.IsArray() || arrayForm.IsArrayAlternate()) { throw new XMPException("Named property must be non-alternate array", XMPErrorConstants.Badxpath); } if (arrayOptions.EqualArrayTypes(arrayForm)) { throw new XMPException("Mismatch of specified and existing array form", XMPErrorConstants.Badxpath); } } else { // *** Right error? // The array does not exist, try to create it. // don't modify the options handed into the method arrayNode = XMPNodeUtils.FindNode(xmp.GetRoot(), arrayPath, true, arrayOptions.SetArray(true)); if (arrayNode == null) { throw new XMPException("Failed to create named array", XMPErrorConstants.Badxpath); } } return(arrayNode); }