validation-modules/cross-validation/src/main/java/org/apache/myfaces/extensions/validator/util/CrossValidationUtils.java

/*
 * 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.extensions.validator.util;

import org.apache.myfaces.extensions.validator.crossval.CrossValidationStorage;

import javax.faces.context.FacesContext;
import java.util.Map;

/**
 * @author Gerhard Petracek
 */
public class CrossValidationUtils {
    public static final String CROSS_VALIDATION_STORAGE_KEY = CrossValidationStorage.class.getName();

    public static CrossValidationStorage getOrInitCrossValidationStorage() {
        Map requestMap = FacesContext.getCurrentInstance().getExternalContext().getRequestMap();

        if (!requestMap.containsKey(CROSS_VALIDATION_STORAGE_KEY)) {
            resetCrossValidationStorage();
        }

        return (CrossValidationStorage) requestMap.get(CROSS_VALIDATION_STORAGE_KEY);
    }

    public static void resetCrossValidationStorage() {
        FacesContext.getCurrentInstance().getExternalContext().getRequestMap().put(CROSS_VALIDATION_STORAGE_KEY, new CrossValidationStorage());
    }
}