io.vertigo.dynamox.search.dsl.rules.DslExpressionRule Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of vertigo-dynamo-impl Show documentation

There is a newer version: 2.1.0

/**
 * vertigo - simple java starter
 *
 * Copyright (C) 2013-2016, KleeGroup, [email protected] (http://www.kleegroup.com)
 * KleeGroup, Centre d'affaire la Boursidiere - BP 159 - 92357 Le Plessis Robinson Cedex - France
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.vertigo.dynamox.search.dsl.rules;

import java.util.List;
import java.util.Optional;

import io.vertigo.commons.peg.AbstractRule;
import io.vertigo.commons.peg.PegChoice;
import io.vertigo.commons.peg.PegRule;
import io.vertigo.commons.peg.PegRules;
import io.vertigo.dynamox.search.dsl.model.DslExpression;
import io.vertigo.dynamox.search.dsl.model.DslField;
import io.vertigo.dynamox.search.dsl.model.DslMultiField;
import io.vertigo.dynamox.search.dsl.model.DslQuery;

/**
 * Parsing rule for ListFilterBuidler's expression.
 * (preExpression)(field|multiField):(query)(postExpression)
 * @author npiedeloup
 */
final class DslExpressionRule extends AbstractRule> {

	DslExpressionRule() {
		super(createMainRule(), "expression");
	}

	private static PegRule> createMainRule() {

		final PegRule> multiFieldsRule = PegRules.sequence(
				DslSyntaxRules.PRE_MODIFIER_VALUE, //0
				new DslMultiFieldRule(), //1
				DslSyntaxRules.POST_MODIFIER_VALUE); //2

		final PegRule fieldsRule = PegRules.choice(//"single or multiple")
				new DslFieldRule(), //0
				multiFieldsRule //1
		);
		final PegRule queriesRule = PegRules.choice(//"single or multiple")
				new DslTermQueryRule(), //0
				new DslRangeQueryRule(), //1
				new DslMultiQueryRule(), //2
				new DslFixedQueryRule() //3
		);
		return PegRules.sequence(
				PegRules.optional(new DslBooleanOperatorRule()), //0
				DslSyntaxRules.SPACES, //1
				fieldsRule, //2
				DslSyntaxRules.FIELD_END,
				queriesRule); //4
	}

	/** {@inheritDoc} */
	@Override
	protected DslExpression handle(final List