/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.apache.myfaces.trinidadinternal.ui.data.bind;

import org.apache.myfaces.trinidadinternal.ui.UIXRenderingContext;
import org.apache.myfaces.trinidadinternal.ui.data.BoundValue;


/**
 * BoundValue that returns <code>Boolean.TRUE</code> if either passed
 * in BoundValues return <code>Boolean.TRUE</code> and returns
 * <code>Boolean.FALSE</code> otherwise.
 * <p>
 * Short circuiting is supported, so that if the first BoudnValue
 * returns <code>Boolean.TRUE</code>, the value of the second
 * BoundValue will never be requested.
 * <p>
 * @version $Name:  $ ($Revision: adfrt/faces/adf-faces-impl/src/main/java/oracle/adfinternal/view/faces/ui/data/bind/OrBoundValue.java#0 $) $Date: 10-nov-2005.18:56:41 $
 * @deprecated This class comes from the old Java 1.2 UIX codebase and should not be used anymore.
 */
@Deprecated
public class OrBoundValue implements BoundValue
{
  /**
   * Creates an OrBoundValue.  Null parameters are treated as if their
   * value returns <code>Boolean.FALSE</code>.
   * <p>
   * @param value1 first BoundValue to OR the result of
   * @param value2 second BoundValue to Or the result of.
   */
  public OrBoundValue(
    BoundValue value1,
    BoundValue value2
    )
  {
    this(new BoundValue[] { value1, value2 });
  }

  /**
   * Creates a OrBoundValue.  Null array elements are treated as if their
   * value returns <code>Boolean.FALSE</code>.
   * <p>
   * @param values array of BoundValues to OR the result of
   */
  public OrBoundValue(
    BoundValue[]  values)
  {
    _values = values;
  }

  public Object getValue(
    UIXRenderingContext context
    )
  {
    if (_values == null || _values.length == 0)
      return Boolean.FALSE;

    for (int i=0; i < _values.length; i++)
    {
      // value is true iff it is not null and bound to Boolean.TRUE.
      boolean value = (_values[i] != null &&
                       Boolean.TRUE.equals(_values[i].getValue(context)));

      // short circuit on first TRUE value
      if (value)
        return Boolean.TRUE;
    }

    return Boolean.FALSE;
  }

  private BoundValue[] _values;
}

