AbstractCheckedInput.java

/*
 * Copyright (c) 2001-2007, Inversoft Inc., All Rights Reserved
 *
 * 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.primeframework.mvc.control.form;

import java.lang.reflect.Array;
import java.util.Map;

import org.primeframework.mvc.parameter.el.ExpressionEvaluator;

import com.google.inject.Inject;

/**
 * This class is the abstract control for the inputs that are checkable such as radio buttons and checkboxes.
 *
 * @author Brian Pontarelli
 */
public abstract class AbstractCheckedInput extends AbstractInput {
  private final ExpressionEvaluator expressionEvaluator;

  @Inject
  public AbstractCheckedInput(ExpressionEvaluator expressionEvaluator) {
    super(true);
    this.expressionEvaluator = expressionEvaluator;
  }

  /**
   * Adds a boolean attribute named checked if the value associated with the control is equal to the value of the tag.
   */
  @Override
  protected void addAdditionalAttributes() {
    super.addAdditionalAttributes();
    String name = (String) attributes.get("name");
    Object action = currentInvocation().action;
    if (!attributes.containsKey("checked") && action != null) {
      Object value = expressionEvaluator.getValue(name, action);
      boolean checked = false;
      if (value == null && attributes.containsKey("defaultChecked")) {
        checked = (Boolean) attributes.get("defaultChecked");
      } else if (value != null) {
        // Collection or array. Iterate and toString each item and compare to value
        String valueAttr = (String) attributes.get("value");
        if (value instanceof Iterable) {
          Iterable<?> iterable = (Iterable<?>) value;
          for (Object o : iterable) {
            if (o.toString().equals(valueAttr)) {
              checked = true;
              break;
            }
          }
        } else if (value.getClass().isArray()) {
          int length = Array.getLength(value);
          for (int i = 0; i < length; i++) {
            Object arrayValue = Array.get(value, i);
            if (arrayValue.toString().equals(valueAttr)) {
              checked = true;
              break;
            }
          }
        } else {
          checked = value.toString().equals(valueAttr);
        }
      }

      if (checked) {
        attributes.put("checked", "checked");
      }
    } else if (attributes.containsKey("checked") && (Boolean) attributes.get("checked")) {
      attributes.put("checked", "checked");
    } else {
      attributes.remove("checked");
    }

    attributes.remove("defaultChecked");
  }

  /**
   * Removes the uncheckedValue attribute and moves it to the parameters.
   *
   * @return The Map.
   */
  @Override
  protected Map<String, Object> makeParameters() {
    Map<String, Object> params = super.makeParameters();
    String uncheckedValue = (String) attributes.remove("uncheckedValue");
    if (uncheckedValue != null) {
      params.put("uncheckedValue", uncheckedValue);
    } else {
      params.put("uncheckedValue", "");
    }

    return params;
  }
}