Package org.appng.core.templating
Interface ThymeleafReplaceInterceptor
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- All Known Implementing Classes:
ThymeleafReplaceInterceptorBase
public interface ThymeleafReplaceInterceptor
This interface has to be implemented by interceptors to intercept the call of the replace tag to determine if this call has to be replaced by another fragment. The interceptor can also add additional context variables. An interceptor also has to be available as bean in the spring context. Therefore the @Component
annotation might be useful.
Example:@Component public class CustomInterceptor extends ThymeleafReplaceInterceptorBase { public boolean intercept(ITemplateContext context, IProcessableElementTag tag, AttributeName attributeName, String attributeValue, IElementTagStructureHandler structureHandler, ThymeleafStandardReplaceTagProcessorCaller tagProcessor) { if (attributeValue.contains("::datacell")) { // we want to replace each call of datacell with our own fragment attributeValue = attributeValue.replace("::datacell", "customtemplate.html::datacell_custom"); // proceed processing with our customized attribute value tagProcessor.callStandardDoProcess(context, tag, attributeName, attributeValue, structureHandler); // tell the replace tag processor that this intereptor already triggered the // processing return true; } // tell the replace tag processor that this interceptor did not intercept return false; } // add all needed template file names for this interceptor public Collection
getAdditionalTemplateResourceNames() { Set resources = Sets.newHashSet(); resources.add("personregister.html"); return resources; } } - Author:
- Claus Stümke
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Method Summary
All Methods Instance Methods Abstract Methods Default Methods Modifier and Type Method Description Collection<String>
getAdditionalTemplateResourceNames()
With this method the interceptor can define additional template files which should be added to the template engine that custom fragments are available during processingdefault int
getPriority()
In case that an application has different interceptors intercepting on the same replace call, the first interceptor will win.boolean
intercept(org.thymeleaf.context.ITemplateContext context, org.thymeleaf.model.IProcessableElementTag tag, org.thymeleaf.engine.AttributeName attributeName, String attributeValue, org.thymeleaf.processor.element.IElementTagStructureHandler structureHandler, ThymeleafStandardReplaceTagProcessorCaller tagProcessor)
This method is called from theReplaceTagProcessor
before executing the ordinary replace logic as implemented by theStandardReplaceTagProcessor
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Method Detail
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intercept
boolean intercept(org.thymeleaf.context.ITemplateContext context, org.thymeleaf.model.IProcessableElementTag tag, org.thymeleaf.engine.AttributeName attributeName, String attributeValue, org.thymeleaf.processor.element.IElementTagStructureHandler structureHandler, ThymeleafStandardReplaceTagProcessorCaller tagProcessor)
This method is called from theReplaceTagProcessor
before executing the ordinary replace logic as implemented by theStandardReplaceTagProcessor
. With this method the interceptor can decide to overwrite the attribute value of the replace tag to call another target fragment instead. Probably the interceptor also has to add additional variables to the context if the other target fragment has parameters which does not exist in the given context If the interceptor wants to intercept, it has to modify the attributeValue and call the doProcess method of the given tagProcessor. It has to return true to indicate that processing was done within this interception to avoid another processing by theReplaceTagProcessor
- Parameters:
context
-tag
-attributeName
-attributeValue
-structureHandler
-tagProcessor
-- Returns:
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getAdditionalTemplateResourceNames
Collection<String> getAdditionalTemplateResourceNames()
With this method the interceptor can define additional template files which should be added to the template engine that custom fragments are available during processing- Returns:
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getPriority
default int getPriority()
In case that an application has different interceptors intercepting on the same replace call, the first interceptor will win. The order of interceptors can be affected by setting a high priority to interceptors which shall be processed first- Returns:
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