Android Open Source - dbfragments Columns

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2013 Yuriy Tkachenko//w w w  .j a v  a  2 s.c o  m
 *
 * 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 db.fragments;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * The table columns collection
 */
public class Columns implements Iterable<Column> {

  private List<Column> columns = new ArrayList<Column>();

  private int currentSize;

  private Map<String, Integer> fld = new LinkedHashMap<String, Integer>();

  public Columns(DBFragment dbfragment) {
   columns.add(new Column(dbfragment).name("ROWID").dataType(G.INTEGER).title("ROWID").show(false));
   fld.put("ROWID", 0);
   currentSize = 1;
  }

  public boolean add(Column col) {
    boolean res = columns.add(col);
    //currentSize = columns.size();
    if (res) {
      fld.put(col.name, currentSize++);
    }
    return res;
  }

  public Column get(int colnum) {
    return columns.get(colnum);
  }

  public Column get(String colname) {
    return columns.get(fld.get(colname));
  }

  public int size() {
    return currentSize;
  }
  
  public Set<String> keySet() {
    return fld.keySet();
  }
  
  public int indexOf(Column col) {
    return columns.indexOf(col);
  }
  
  public int indexOf(String colname) {
    return fld.get(colname);
  }

  @Override
  public Iterator<Column> iterator() {
    Iterator<Column> it = new Iterator<Column>() {

      private int currentIndex = 0;

      @Override
      public boolean hasNext() {
        return currentIndex < currentSize
            && columns.get(currentIndex) != null;
      }

      @Override
      public Column next() {
        return columns.get(currentIndex++);
      }

      @Override
      public void remove() {
        // TODO Auto-generated method stub
      }
    };
    return it;
  }

}

Java Source Code List

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