jetx.ext.internal.FunctionUtils.java Source code

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Here is the source code for jetx.ext.internal.FunctionUtils.java

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/*
 * Copyright 2002-2012 Zhuo Ying. All rights reserved.
 * Email: yingzhor@gmail.com
 *
 * 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 jetx.ext.internal;

import java.util.Set;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;

import jetbrick.template.JetContext;
import jetbrick.template.runtime.JetPageContext;
import jetbrick.template.web.JetWebContext;

import org.springframework.validation.BindingResult;
import org.springframework.validation.Errors;

public final class FunctionUtils {

    private FunctionUtils() {
    }

    /*
     ------------------------------------------------------------------------------------------------------------------- */

    @Deprecated
    public static HttpServletRequest getRequest(JetPageContext ctx) {
        return (HttpServletRequest) ctx.getContext().get(JetWebContext.REQUEST);
    }

    @Deprecated
    public static ServletContext getServletContext(JetPageContext ctx) {
        return (ServletContext) ctx.getContext().get(JetWebContext.SERVLET_CONTEXT);
    }

    /*
     ------------------------------------------------------------------------------------------------------------------- */

    /**
     * @since 1.0.7
     */
    public static Errors findErrors(JetContext jetContext) {
        Set<String> keyset = jetContext.keySet();

        Errors result = null;
        for (String key : keyset) {
            if (key.startsWith(BindingResult.MODEL_KEY_PREFIX)) {
                try {
                    result = (Errors) jetContext.get(key);
                } catch (ClassCastException e) {
                    // 
                }
                if (result != null)
                    return null; // Errors
            }
        }

        // ?JetContext
        JetContext parent = jetContext.getParent();
        return parent != null ? findErrors(parent) : null;
    }

}