org.mapstruct.ap.internal.model.StreamMappingMethod.ftl Maven / Gradle / Ivy
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An annotation processor for generating type-safe bean mappers
<#--
Copyright MapStruct Authors.
Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
-->
<#-- @ftlvariable name="" type="org.mapstruct.ap.internal.model.StreamMappingMethod" -->
<#if overridden>@Override
<#lt>${accessibility.keyword} <@includeModel object=returnType/> ${name}(<#list parameters as param><@includeModel object=param/><#if param_has_next>, )<@throws/> {
<#--TODO does it even make sense to do a callback if the result is a Stream, as they are immutable-->
<#list beforeMappingReferencesWithoutMappingTarget as callback>
<@includeModel object=callback targetBeanName=resultName targetType=resultType/>
<#if !callback_has_next>
if ( ${sourceParameter.name} == null ) {
<#if !mapNullToDefault>
return<#if returnType.name != "void"> <#if existingInstanceMapping>${resultName}<#else>null;
<#else>
<#if resultType.arrayType>
<#if existingInstanceMapping>
<#-- we can't clear an existing array, so we've got to clear by setting values to default -->
for (int ${index2Name} = 0; ${index2Name} < ${resultName}.length; ${index2Name}++ ) {
${resultName}[${index2Name}] = ${resultElementType.null};
}
return<#if returnType.name != "void"> ${resultName};
<#else>
return new <@includeModel object=resultElementType/>[0];
<#elseif resultType.iterableType>
<#if existingInstanceMapping>
${resultName}.clear();
return<#if returnType.name != "void"> ${resultName};
<#else>
return <@includeModel object=iterableCreation useSizeIfPossible=false/>;
<#else>
<#if existingInstanceMapping>
<#-- We cannot update an existing stream so we just return the old one -->
return<#if returnType.name != "void"> ${resultName};
<#else>
return Stream.empty();
}
<#-- A variable needs to be defined if there are before or after mappings and this is not exisitingInstanceMapping -->
<#assign needVarDefine = (beforeMappingReferencesWithMappingTarget?has_content || afterMappingReferences?has_content) && !existingInstanceMapping />
<#if resultType.arrayType>
<#if needVarDefine>
<#assign needVarDefine = false />
<#-- We create a null array which later will be directly assigned from the stream-->
<@includeModel object=resultElementType/>[] ${resultName} = null;
<#elseif resultType.iterableType>
<#if existingInstanceMapping>
${resultName}.clear();
<#elseif needVarDefine>
<#assign needVarDefine = false />
<#-- Use the interface type on the left side, except it is java.lang.Iterable; use the implementation type - if present - on the right side -->
<@iterableLocalVarDef/> ${resultName} = <@includeModel object=iterableCreation useSizeIfPossible=true/>;
<#else>
<#-- Streams are immutable so we can't update them -->
<#if needVarDefine>
<#assign needVarDefine = false />
<@iterableLocalVarDef/> ${resultName} = Stream.empty();
<#list beforeMappingReferencesWithMappingTarget as callback>
<@includeModel object=callback targetBeanName=resultName targetType=resultType/>
<#if !callback_has_next>
<#-- If there are no after mappings, no variable was created before i.e. no before mappings
and this is not an existingInstanceMapping then we can return immediatelly -->
<#assign canReturnImmediatelly = !afterMappingReferences?has_content && !needVarDefine && !existingInstanceMapping/>
<#if resultType.arrayType>
<#if existingInstanceMapping>
int ${index1Name} = 0;
for ( <@includeModel object=resultElementType/> ${loopVariableName} : ${sourceParameter.name}.limit( ${resultName}.length )<@streamMapSupplier />.toArray( ${resultElementType}[]::new ) ) {
if ( ( ${index1Name} >= ${resultName}.length ) ) {
break;
}
${resultName}[${index1Name}++] = ${loopVariableName};
}
<#else>
<#if canReturnImmediatelly><#if returnType.name != "void">return <#else> <#if needVarDefine>${resultElementType}[] <#else>${resultName} = ${sourceParameter.name}<@streamMapSupplier />
.toArray( <@includeModel object=resultElementType/>[]::new );
<#elseif resultType.iterableType>
<#if existingInstanceMapping || !canReturnImmediatelly>
${resultName}.addAll( ${sourceParameter.name}<@streamMapSupplier />
.collect( Collectors.toCollection( <@iterableCollectionSupplier /> ) )
);
<#else>
<@returnLocalVarDefOrUpdate>
<#lt>${sourceParameter.name}<@streamMapSupplier />
.collect( Collectors.toCollection( <@iterableCollectionSupplier /> ) );
<#else>
<#-- Streams are immutable so we can't update them -->
<#if !existingInstanceMapping>
<#--TODO fhr: after the result is no longer the same instance, how does it affect the
Before mapping methods. Does it even make sense to have before mapping on a stream? -->
<#if sourceParameter.type.arrayType>
<@returnLocalVarDefOrUpdate>Stream.of( ${sourceParameter.name} )<@streamMapSupplier />;
<#elseif sourceParameter.type.collectionType>
<@returnLocalVarDefOrUpdate>${sourceParameter.name}.stream()<@streamMapSupplier />;
<#elseif sourceParameter.type.iterableType>
<@returnLocalVarDefOrUpdate>StreamSupport.stream( ${sourceParameter.name}.spliterator(), false )<@streamMapSupplier />;
<#else>
<@returnLocalVarDefOrUpdate>${sourceParameter.name}<@streamMapSupplier />;
<#list afterMappingReferences as callback>
<#if callback_index = 0>
<@includeModel object=callback targetBeanName=resultName targetType=resultType/>
<#if !canReturnImmediatelly && returnType.name != "void">
return ${resultName};
}
<#macro throws>
<#if (thrownTypes?size > 0)><#lt> throws <@compress single_line=true>
<#list thrownTypes as exceptionType>
<@includeModel object=exceptionType/>
<#if exceptionType_has_next>, <#t>
<#macro iterableSize>
<@compress single_line=true>
<#if sourceParameter.type.arrayType>
${sourceParameter.name}.length
<#else>
${sourceParameter.name}.size()
<#macro iterableLocalVarDef>
<@compress single_line=true>
<#if resultType.fullyQualifiedName == "java.lang.Iterable">
<@includeModel object=resultType.implementationType/>
<#else>
<@includeModel object=resultType/>
<#macro iterableCollectionSupplier>
<@compress single_line=true>
<#if resultType.implementationType??>
<@includeModel object=resultType.implementationType/>
<#else>
<@includeModel object=resultType/>::new
<#macro streamMapSupplier>
<@compress>
<#if !elementAssignment.directAssignment?? || !elementAssignment.directAssignment>
.map( <@includeModel object=elementAssignment targetBeanName=resultName targetType=resultElementType/> )
<#macro returnLocalVarDefOrUpdate>
<#if canReturnImmediatelly><#if returnType.name != "void">return <#elseif needVarDefine><@iterableLocalVarDef/> ${resultName} = <#else>${resultName} = <#nested />