/**
* Constructs grammar.
*
* @throws GrammarException if some of rules were used, but not defined
* @return grammar
* @see #buildWithMemoizationOfMatchesForAllRules()
*/
public Grammar build() {
for (RuleDefinition rule : definitions.values()) {
if (rule.getExpression() == null) {
throw new GrammarException("The rule '" + rule.getRuleKey() + "' hasn't beed defined.");
}
}
return new MutableGrammar(definitions, rootRuleKey);
}
/**
* Constructs grammar with memoization of matches for all rules.
*
* @throws GrammarException if some of rules were used, but not defined
* @return grammar
* @see #build()
*/
public Grammar buildWithMemoizationOfMatchesForAllRules() {
for (RuleDefinition rule : definitions.values()) {
rule.enableMemoization();
}
return build();
}
public static RuleDefinition newRuleBuilder(RuleMatcher ruleMatcher) {
RuleDefinition ruleBuilder = new RuleDefinition();
ruleBuilder.setRuleMatcher(ruleMatcher);
return ruleBuilder;
}
public static RuleDefinition newRuleBuilder(String ruleName) {
RuleDefinition ruleBuilder = new RuleDefinition();
ruleBuilder.setRuleMatcher(new RuleMatcher(ruleName));
return ruleBuilder;
}