TagFilter.java

package com.gmail.dpierron.calibre.datamodel.filter;

import com.gmail.dpierron.calibre.datamodel.Book;
import com.gmail.dpierron.calibre.datamodel.Tag;
import com.gmail.dpierron.tools.Helper;

public class TagFilter implements BookFilter {

  /** the filter string */
  private final String filterValue;

  /** if true, all the tags that contain the filter string are valid */
  private final boolean contains;

  public TagFilter(String filterValue, boolean contains) {
    this.contains = contains;
    this.filterValue = (contains ? filterValue.toUpperCase() : filterValue); // if the "contains" flag is set, optimize by storing the filter string uppercased
  }

  public boolean didBookPassThroughFilter(Book book) {
    if (book == null)
      return false;

    if (Helper.isNullOrEmpty(filterValue))
      return true;

    for (Tag tag : book.getTags()) {
      if (contains) {
        if (tag.getName().toUpperCase().contains(filterValue))
          return true;
      } else {
        if (tag.getName().equalsIgnoreCase(filterValue))
          return true;
      }
    }
    return false;
  }
}