gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/util/GraphVariableHelper.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.tinkerpop.gremlin.structure.util;

import org.apache.tinkerpop.gremlin.structure.Graph;

/**
 * @author Marko A. Rodriguez (http://markorodriguez.com)
 */
public final class GraphVariableHelper {

    private GraphVariableHelper() { }

    public static void validateVariable(final String variable, final Object value) throws IllegalArgumentException {
        if (null == value)
            throw Graph.Variables.Exceptions.variableValueCanNotBeNull();
        if (null == variable)
            throw Graph.Variables.Exceptions.variableKeyCanNotBeNull();
        if (variable.isEmpty())
            throw Graph.Variables.Exceptions.variableKeyCanNotBeEmpty();
    }
}