Generator.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.falcon.regression.core.util;

/** Generator class for generating predictable names and paths. */
public final class Generator {
    private final String prefix;
    private final String postfix;
    private final String formatString;
    private int count;


    private Generator(String prefix, String postfix, String formatString) {
        this.prefix = prefix;
        this.postfix = postfix;
        this.count = 0;
        this.formatString = formatString;
    }

    public String generate() {
        count++;
        return String.format(formatString, prefix, count, postfix);
    }

    public static Generator getNameGenerator(String prefix, String postfix) {
        return new Generator(prefix, postfix, "%s%03d-%s");
    }

    public static Generator getHadoopPathGenerator(String prefix, String postfix) {
        return new Generator(prefix, postfix, "%s_%03d%s");
    }
}