org.springframework.data.cassandra.support.CqlDataSet.java Source code

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Here is the source code for org.springframework.data.cassandra.support.CqlDataSet.java

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/*
 * Copyright 2017-2018 the original author or authors.
 *
 * 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 org.springframework.data.cassandra.support;

import lombok.SneakyThrows;

import java.net.URL;
import java.nio.charset.Charset;
import java.util.List;

import org.springframework.util.Assert;

import com.google.common.io.Resources;

/**
 * An executable CQL data set. The data set can be created from class path resources and execution can be bound to a
 * particular keyspace.
 *
 * @author Mark Paluch
 */
public class CqlDataSet {

    private URL location = null;

    private String keyspaceName = null;

    private CqlDataSet(URL location, String keyspaceName) {

        this.location = location;
        this.keyspaceName = keyspaceName;
    }

    /**
     * Obtain the {@link List} of statements to execute.
     *
     * @return
     */
    public List<String> getCqlStatements() {
        return getLines();
    }

    @SneakyThrows
    private List<String> getLines() {
        return Resources.readLines(location, Charset.defaultCharset());
    }

    /**
     * Returns the optional keyspace name.
     *
     * @return
     */
    public String getKeyspaceName() {
        return keyspaceName;
    }

    /**
     * Bind the {@link CqlDataSet} to a particular keyspace. Create a new instance of the {@link CqlDataSet} with the
     * keyspace name set.
     *
     * @param keyspaceName
     * @return
     */
    public CqlDataSet executeIn(String keyspaceName) {

        Assert.hasText(keyspaceName, "KeyspaceName must not be empty!");
        return new CqlDataSet(location, keyspaceName);
    }

    /**
     * Create a {@link CqlDataSet} from a class-path resource.
     *
     * @param resource
     * @return
     */
    public static CqlDataSet fromClassPath(String resource) {

        URL url = Resources.getResource(resource);
        return new CqlDataSet(url, null);
    }
}