Examples of org.hibernate.ogm.datastore.mongodb.util.impl.LikeExpressionToRegExpConverter

org.hibernate.ogm.datastore.mongodb.util.impl.LikeExpressionToRegExpConverter

Creates {@link Pattern} objects equivalent to given HQL/JPQL {@code LIKE} expressions.

Used by {@link org.hibernate.ogm.datastore.mongodb.query.parsing.predicate.impl.MongoDBLikePredicate} to run {@code LIKE}queries against MongoDB, using the {@code $regex} operator.

The following rules apply for creating regular expressions:

the {@code _} wildcard is replaced by {@code .} (unless it is escaped)
the {@code %} wildcard is replaced by {@code .*} (unless it is escaped)
non-wildcard character sequences are quoted (wrapped by {@code \\Q...\\E}) to match them as is
escape characters are omitted from the resulting pattern
the pattern is wrapped by {@code ^...$} to make sure the entire string is matched
the reg exp wildcard {@code .} matches line breaks

@author Gunnar Morling

  private final Pattern pattern;


  public MongoDBLikePredicate(String propertyName, String patternValue, Character escapeCharacter) {
    super( propertyName, patternValue, escapeCharacter );


    LikeExpressionToRegExpConverter converter = new LikeExpressionToRegExpConverter( escapeCharacter );
    pattern = converter.getRegExpFromLikeExpression( patternValue );
  }

  private final Pattern pattern;


  public MongoDBLikePredicate(String propertyName, String patternValue, Character escapeCharacter) {
    super( propertyName, patternValue, escapeCharacter );


    LikeExpressionToRegExpConverter converter = new LikeExpressionToRegExpConverter( escapeCharacter );
    pattern = converter.getRegExpFromLikeExpression( patternValue );
  }

Examples of org.hibernate.ogm.datastore.mongodb.util.impl.LikeExpressionToRegExpConverter

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