


Recently, I needed to perform a query using the AEM Query Builder which was case insensitive. While I normally prefer using JCR SQL2 queries, in this case Query Builder was a better fit as I wanted consuming applications to be able to manipulate the query and doing so as a map is significantly easier than doing so as a string. I was surprised to find that there was no native Query Builder Predicate for doing case insensitive queries so I ended up writing my own. The predicate works by lower casing the value and then using the XPath fn:lower-case method to compare to the field value in lower case. /* This is free and unencumbered software released into the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means. In jurisdictions that recognize copyright laws, the author or authors of this software dedicate any and all copyright interest in the software to the public domain. We make this dedication for the benefit of the public at large and to the detriment of our heirs and successors. We intend this dedication to be an overt act of relinquishment in perpetuity of all present and future rights to this software under copyright law. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. For more information, please refer to */ package com.perficient.adobe.predicates; import java.util.Locale; import java.util.Optional; import com.day.cq.search.Predicate; import com.day.cq.search.eval.AbstractPredicateEvaluator; import com.day.cq.search.eval.EvaluationContext; import org.osgi.service.component.annotations.Component; import org.slf4j.Logger; import org.slf4j.LoggerFactory; @Component(factory = "com.day.cq.search.eval.PredicateEvaluator/equalsIgnoreCase") public class CaseInsensitiveEquals extends AbstractPredicateEvaluator { private static final Logger log = LoggerFactory.getLogger(CaseInsensitiveEquals.class); static final String PREDICATE_PROPERTY = "property"; static final String PREDICATE_VALUE = "value"; static final String PREDICATE_LOCALE = "locale"; @Override public String getXPathExpression(Predicate predicate, EvaluationContext context) { log.debug("Evaluating predicate: {}", predicate); String property = predicate.get(PREDICATE_PROPERTY); Locale locale = Optional.ofNullable(predicate.get(PREDICATE_LOCALE)).map(lt -> Locale.forLanguageTag(lt)) .orElse(Locale.getDefault()); String value = predicate.get(PREDICATE_VALUE).toLowerCase(locale).replace("'", "''"); String query = String.format("fn:lower-case(@%s)='%s'", property, value); log.debug("Generated query: {}", query); return query; } } Once the custom predicate is available in your application, it can be used in any Query Builder query as such: path=/content/test equalsIgnoreCase.property=test equalsIgnoreCase.value=test equalsIgnoreCase.locale=en_US
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