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Holon Vaadin integration

There is a newer version: 5.4.0

/*
 * Copyright 2000-2017 Holon TDCN.
 * 
 * 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 com.holonplatform.vaadin.internal.components;

import com.holonplatform.core.Validator;
import com.holonplatform.core.internal.utils.ObjectUtils;
import com.holonplatform.vaadin.components.Input;
import com.vaadin.data.ValidationResult;
import com.vaadin.data.ValueContext;

/**
 * Vaadin {@link com.vaadin.data.Validator} to Holon {@link Validator} wrapper.
 * 
 * @param  Value type
 *
 * @since 5.0.0
 */
public class VaadinValidatorWrapper implements Validator {

	private static final long serialVersionUID = 3664165755542688523L;

	private final com.vaadin.data.Validator validator;
	private final ValueContext context;
	private final Input input;

	/**
	 * Constructor
	 * @param validator Vaadin validator (not null)
	 * @param context Validation context (may be null)
	 * @param input Input to validate (may be null)
	 */
	public VaadinValidatorWrapper(com.vaadin.data.Validator validator, ValueContext context, Input input) {
		super();
		ObjectUtils.argumentNotNull(validator, "Validator must be not null");
		this.validator = validator;
		this.context = context;
		this.input = input;
	}

	private ValueContext getValueContext() {
		if (context != null) {
			return context;
		}
		if (input != null && input.getComponent() != null) {
			return new ValueContext(input.getComponent());
		}
		return new ValueContext();
	}

	/*
	 * (non-Javadoc)
	 * @see com.holonplatform.core.Validator#validate(java.lang.Object)
	 */
	@Override
	public void validate(T value) throws ValidationException {
		ValidationResult result = validator.apply(value, getValueContext());
		if (result.isError()) {
			throw new ValidationException(result.getErrorMessage());
		}
	}

}