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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 org.activiti.engine.impl;

import org.activiti.engine.impl.interceptor.Command;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.interceptor.CommandExecutor;
import org.activiti.engine.management.TablePage;
import org.activiti.engine.management.TablePageQuery;

import java.io.Serializable;

/**
 * 

 */
public class TablePageQueryImpl implements TablePageQuery, Command, Serializable {

  private static final long serialVersionUID = 1L;

  transient CommandExecutor commandExecutor;

  protected String tableName;
  protected String order;
  protected int firstResult;
  protected int maxResults;

  public TablePageQueryImpl() {
  }

  public TablePageQueryImpl(CommandExecutor commandExecutor) {
    this.commandExecutor = commandExecutor;
  }

  public TablePageQueryImpl tableName(String tableName) {
    this.tableName = tableName;
    return this;
  }

  public TablePageQueryImpl orderAsc(String column) {
    addOrder(column, AbstractQuery.SORTORDER_ASC);
    return this;
  }

  public TablePageQueryImpl orderDesc(String column) {
    addOrder(column, AbstractQuery.SORTORDER_DESC);
    return this;
  }

  public String getTableName() {
    return tableName;
  }

  protected void addOrder(String column, String sortOrder) {
    if (order == null) {
      order = "";
    } else {
      order = order + ", ";
    }
    order = order + column + " " + sortOrder;
  }

  public TablePage listPage(int firstResult, int maxResults) {
    this.firstResult = firstResult;
    this.maxResults = maxResults;
    return commandExecutor.execute(this);
  }

  public TablePage execute(CommandContext commandContext) {
    return commandContext.getTableDataManager().getTablePage(this, firstResult, maxResults);
  }

  public String getOrder() {
    return order;
  }

}