MetaList.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2018 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.elephant.context;
 
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import org.turro.util.CompareUtil;
 
public class MetaList extends ArrayList<String> {
 
  public MetaList(Collection<? extends String> c) {
    super(c);
  }
 
  @Override
  public boolean addAll(Collection<? extends String> c) {
    if(c == null) return false;
    for(String s : c) {
      add(s);
    }
    return true;
  }
 
  @Override
  public boolean add(String e) {
    Iterator<String> it = iterator();
    while(it.hasNext()) {
      String meta = it.next();
      if(isSameProperty(meta, e)) {
        it.remove();
      }
    }
    return super.add(e);
  }
  
  private boolean isSameProperty(String meta1, String meta2) {
    return CompareUtil.compare(metaProperty(meta1), metaProperty(meta2)) == 0;
  }
  
  private String metaProperty(String meta) {
    int p = meta.indexOf("content=");
    if(p > -1) {
      return meta.substring(0, p).toLowerCase().trim();
    } else {
      return meta.toLowerCase().trim();
    }
  }
  
}