/*
* 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.wicket.markup.html.form.validation;
import java.util.HashMap;
import java.util.Map;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.html.form.FormComponent;
import org.apache.wicket.model.IModel;
import org.apache.wicket.validation.ValidationError;
/**
* Base class for {@link org.apache.wicket.markup.html.form.validation.IFormValidator}s.
*
* @author Igor Vaynberg (ivaynberg)
*/
public abstract class AbstractFormValidator extends Behavior implements IFormValidator
{
private static final long serialVersionUID = 1L;
/**
* Reports an error against validatable using the map returned by {@link #variablesMap()}for
* variable interpolations and message key returned by {@link #resourceKey()}.
*
* @param fc
* form component against which the error is reported
*
*/
public void error(FormComponent<?> fc)
{
error(fc, resourceKey(), variablesMap());
}
/**
* Reports an error against the validatable using the given resource key
*
* @param fc
* form component against which the error is reported
* @param resourceKey
* The message resource key to use
*/
public void error(FormComponent<?> fc, final String resourceKey)
{
if (resourceKey == null)
{
throw new IllegalArgumentException("Argument [[resourceKey]] cannot be null");
}
error(fc, resourceKey, variablesMap());
}
/**
* Reports an error against the validatable using the given map for variable interpolations and
* message resource key provided by {@link #resourceKey()}
*
* @param fc
* form component against which the error is reported
* @param vars
* variables for variable interpolation
*/
public void error(FormComponent<?> fc, final Map<String, Object> vars)
{
if (vars == null)
{
throw new IllegalArgumentException("Argument [[vars]] cannot be null");
}
error(fc, resourceKey(), vars);
}
/**
* Reports an error against the validatable using the specified resource key and variable map
*
* @param fc
* form component against which the error is reported
* @param resourceKey
* The message resource key to use
* @param vars
* The model for variable interpolation
*/
public void error(FormComponent<?> fc, final String resourceKey, Map<String, Object> vars)
{
if (fc == null)
{
throw new IllegalArgumentException("Argument [[fc]] cannot be null");
}
if (vars == null)
{
throw new IllegalArgumentException("Argument [[vars]] cannot be null");
}
if (resourceKey == null)
{
throw new IllegalArgumentException("Argument [[resourceKey]] cannot be null");
}
ValidationError error = new ValidationError().addKey(resourceKey);
final String defaultKey = getClass().getSimpleName();
if (!resourceKey.equals(defaultKey))
{
error.addKey(defaultKey);
}
error.setVariables(vars);
fc.error(error);
}
/**
* Gets the default variables for interpolation. These are for every component:
* <ul>
* <li>${input(n)}: the user's input</li>
* <li>${name(n)}: the name of the component</li>
* <li>${label(n)}: the label of the component - either comes from FormComponent.labelModel or
* resource key [form-id].[form-component-id] in that order</li>
* </ul>
*
* @return a map with the variables for interpolation
*/
protected Map<String, Object> variablesMap()
{
FormComponent<?>[] formComponents = getDependentFormComponents();
if (formComponents != null && formComponents.length > 0)
{
Map<String, Object> args = new HashMap<String, Object>(formComponents.length * 3);
for (int i = 0; i < formComponents.length; i++)
{
final FormComponent<?> formComponent = formComponents[i];
String arg = "label" + i;
IModel<?> label = formComponent.getLabel();
if (label != null)
{
args.put(arg, label.getObject());
}
else
{
args.put(
arg,
formComponent.getLocalizer().getString(formComponent.getId(),
formComponent.getParent(), formComponent.getId()));
}
args.put("input" + i, formComponent.getInput());
args.put("name" + i, formComponent.getId());
}
return args;
}
else
{
return new HashMap<String, Object>(2);
}
}
/**
* Gets the resource key for validator's error message from the ApplicationSettings class.
*
* @return the resource key based on the form component
*/
protected String resourceKey()
{
return getClass().getSimpleName();
}
}