ons-core/ons-api/src/main/java/org/apache/rocketmq/ons/api/MessageSelector.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.rocketmq.ons.api;

public class MessageSelector {

    private ExpressionType type;

    private String subExpression;

    public static MessageSelector bySql(String subExpression) {
        return new MessageSelector(ExpressionType.SQL92, subExpression);
    }

    public static MessageSelector byTag(String subExpression) {
        return new MessageSelector(ExpressionType.TAG, subExpression);
    }

    private MessageSelector() {
    }

    private MessageSelector(ExpressionType type, String subExpression) {
        this.type = type;
        this.subExpression = subExpression;
    }

    public ExpressionType getType() {
        return type;
    }

    public String getSubExpression() {
        return subExpression;
    }
}