freemarker.ext.jsp.JspContextModel Maven / Gradle / Ivy

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Google App Engine compliant variation of FreeMarker. FreeMarker is a "template engine"; a generic tool to generate text output based on templates.

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/*
 * Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
 * 
 * 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 freemarker.ext.jsp;

import javax.servlet.jsp.PageContext;

import freemarker.ext.beans.BeansWrapper;
import freemarker.template.TemplateHashModel;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;

class JspContextModel
implements
    TemplateHashModel
{
    public static final int ANY_SCOPE = -1;
    public static final int PAGE_SCOPE = PageContext.PAGE_SCOPE;
    public static final int REQUEST_SCOPE = PageContext.REQUEST_SCOPE;
    public static final int SESSION_SCOPE = PageContext.SESSION_SCOPE;
    public static final int APPLICATION_SCOPE = PageContext.APPLICATION_SCOPE;

    private final PageContext pageContext;
    private final int scope;

    public JspContextModel(PageContext pageContext, int scope)
    {
        this.pageContext = pageContext;
        this.scope = scope;
    }

    public TemplateModel get(String key) throws TemplateModelException
    {
        Object bean = scope == ANY_SCOPE ? pageContext.findAttribute(key) : pageContext.getAttribute(key, scope);
        return BeansWrapper.getDefaultInstance().wrap(bean);
    }

    public boolean isEmpty()
    {
        return false;
    }
}