RegexParseSpec.java

/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets 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 io.druid.data.input.impl;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.metamx.common.parsers.Parser;
import com.metamx.common.parsers.RegexParser;

import java.util.List;

/**
 */
public class RegexParseSpec extends ParseSpec
{
  private final String listDelimiter;
  private final List<String> columns;
  private final String pattern;

  @JsonCreator
  public RegexParseSpec(
      @JsonProperty("timestampSpec") TimestampSpec timestampSpec,
      @JsonProperty("dimensionsSpec") DimensionsSpec dimensionsSpec,
      @JsonProperty("listDelimiter") String listDelimiter,
      @JsonProperty("columns") List<String> columns,
      @JsonProperty("pattern") String pattern
  )
  {
    super(timestampSpec, dimensionsSpec);

    this.listDelimiter = listDelimiter;
    this.columns = columns;
    this.pattern = pattern;

    verify(dimensionsSpec.getDimensionNames());
  }

  @JsonProperty
  public String getListDelimiter()
  {
    return listDelimiter;
  }

  @JsonProperty("pattern")
  public String getPattern()
  {
    return pattern;
  }

  @JsonProperty
  public List<String> getColumns()
  {
    return columns;
  }

  @Override
  public void verify(List<String> usedCols)
  {
    if (columns != null) {
      for (String columnName : usedCols) {
        Preconditions.checkArgument(columns.contains(columnName), "column[%s] not in columns.", columnName);
      }
    }
  }

  @Override
  public Parser<String, Object> makeParser()
  {
    if (columns == null) {
      return new RegexParser(pattern, Optional.fromNullable(listDelimiter));
    }
    return new RegexParser(pattern, Optional.fromNullable(listDelimiter), columns);
  }

  @Override
  public ParseSpec withTimestampSpec(TimestampSpec spec)
  {
    return new RegexParseSpec(spec, getDimensionsSpec(), listDelimiter, columns, pattern);
  }

  @Override
  public ParseSpec withDimensionsSpec(DimensionsSpec spec)
  {
    return new RegexParseSpec(getTimestampSpec(), spec, listDelimiter, columns, pattern);
  }

  public ParseSpec withColumns(List<String> cols)
  {
    return new RegexParseSpec(getTimestampSpec(), getDimensionsSpec(), listDelimiter, cols, pattern);
  }

  public ParseSpec withPattern(String pat)
  {
    return new RegexParseSpec(getTimestampSpec(), getDimensionsSpec(), listDelimiter, columns, pat);
  }
}