gobblin.converter.jdbc.JdbcEntryData.java Source code

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Here is the source code for gobblin.converter.jdbc.JdbcEntryData.java

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/*
 * 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 gobblin.converter.jdbc;

import java.util.Iterator;
import java.util.Map;

import lombok.ToString;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSortedMap;

@ToString
public class JdbcEntryData implements Iterable<JdbcEntryDatum> {
    private final Map<String, JdbcEntryDatum> jdbcEntryData; //Pair of column name and Object

    public JdbcEntryData(Iterable<JdbcEntryDatum> jdbcEntryDatumEntries) {
        Preconditions.checkNotNull(jdbcEntryDatumEntries);
        ImmutableMap.Builder<String, JdbcEntryDatum> builder = ImmutableSortedMap.naturalOrder();
        for (JdbcEntryDatum datum : jdbcEntryDatumEntries) {
            builder.put(datum.getColumnName(), datum);
        }
        this.jdbcEntryData = builder.build();
    }

    /**
     * @param columnName Column name case sensitive, as most of RDBMS does.
     * @return Returns Object which is JDBC compatible -- can be used for PreparedStatement.setObject
     */
    public Object getVal(String columnName) {
        JdbcEntryDatum datum = this.jdbcEntryData.get(columnName);
        return datum == null ? null : datum.getVal();
    }

    /**
     * Provides iterator sorted by column name
     * {@inheritDoc}
     * @see java.lang.Iterable#iterator()
     */
    @Override
    public Iterator<JdbcEntryDatum> iterator() {
        return this.jdbcEntryData.values().iterator();
    }
}