Fix PMD reported problems

Author: AB-xdev

spring-data-eclipse-store/src/main/java/software/xdev/spring/data/eclipse/store/repository/query/antlr/HSqlQueryExecutor.java

@@ -37,6 +37,8 @@
 
 public class HSqlQueryExecutor<T>
 {
+	protected static final DateTimeFormatter LOCAL_DATE_REPLACE_DTF = DateTimeFormatter.ofPattern("yyyy-MM-dd");
+	
 	private final SQLParser<T> parser;
 	private final EntityListProvider entityListProvider;
 	private final Class<T> domainClass;
@@ -80,7 +82,7 @@ private String replacePlaceholders(final String sqlValue, final Object[] paramet
 			}
 			if(parameters[i] instanceof final LocalDate localDate)
 			{
-				value = localDate.format(DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+				value = localDate.format(LOCAL_DATE_REPLACE_DTF);
 			}
 			stringWithReplacedValues = stringWithReplacedValues.replaceAll(placeholder, value);
 		}

spring-data-eclipse-store/src/main/java/software/xdev/spring/data/eclipse/store/repository/query/criteria/CriteriaByExample.java

@@ -17,10 +17,12 @@
 
 import java.lang.reflect.Field;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
+import java.util.WeakHashMap;
 import java.util.function.BiPredicate;
 import java.util.function.Predicate;
 import java.util.regex.Pattern;
@@ -38,6 +40,7 @@
  */
 public class CriteriaByExample<T, S extends T> implements Criteria<T>
 {
+	private static final Map<String, Pattern> REGEX_EXAMPLE_CACHE = Collections.synchronizedMap(new WeakHashMap<>());
 	private final Predicate<T> predicate;
 
 	public CriteriaByExample(final Example<S> example)
@@ -143,7 +146,9 @@ private boolean createPredicateForStringMatcher(
 			case STARTING -> String::startsWith;
 			case ENDING -> String::endsWith;
 			case CONTAINING -> String::contains;
-			case REGEX -> (v, example) -> Pattern.compile(example).matcher(v).find();
+			case REGEX -> (v, example) -> REGEX_EXAMPLE_CACHE.computeIfAbsent(example, Pattern::compile)
+				.matcher(v)
+				.find();
 			default -> null;
 		};