JoinedStrings.java

/* vim: set ts=2 et sw=2 cindent fo=qroca: */

package com.globant.katari.core.spring;

import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.config.AbstractFactoryBean;

import org.apache.commons.lang.Validate;

/** A spring factory bean that creates a string concatenating other strings.
 */
public class JoinedStrings extends AbstractFactoryBean<String> {

  /** The values to concatenate, in the provided oder, never null.
   */
  private String[] values = new String[0];

  /** {@inheritDoc}
   */
  @Override
  protected String createInstance() {
    return StringUtils.join(values);
  }

  /** {@inheritDoc}
   */
  @Override
  public Class<String> getObjectType() {
    return String.class;
  }

  /** Sets the values to concatenate.
   *
   * @param theValues the values to concatenate, never null. The values are
   * concatenated in the provided order.
   */
  public void setValues(final String[] theValues) {
    Validate.notNull(theValues, "The values cannot be null.");
    values = theValues;
  }
}