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fogbow / src / main / scala / fogbow / util / StringUtil.scala

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/**
 * 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 fogbow.util;

// A tokenizer that replaces all non-word characters with whitespace
// and then returns a StringTokenizer.
object CleanStringTokenizer {
  import java.util.StringTokenizer

  def apply (raw: String, doLowerCase: Boolean = true): StringTokenizer = {
    val cleaned = raw.replaceAll("[^\\p{L}\\p{N}]", " ")
    if (doLowerCase)
      new StringTokenizer(cleaned.toLowerCase)
    else
      new StringTokenizer(cleaned)
  }

  // Need this since Java doesn't do defaults...
  def apply (raw: String): StringTokenizer = apply(raw, true)

}