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// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

package jodd.madvoc.injector;

import jodd.madvoc.ActionRequest;
import jodd.madvoc.ScopeData;
import jodd.madvoc.ScopeType;
import jodd.madvoc.component.ScopeDataResolver;

import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;

/**
 * Servlet session scope injector.
 */
public class SessionScopeInjector extends BaseScopeInjector implements Injector, Outjector {

	public SessionScopeInjector(ScopeDataResolver scopeDataResolver) {
		super(ScopeType.SESSION, scopeDataResolver);
		silent = true;
	}

	public void inject(ActionRequest actionRequest) {
		ScopeData[] injectData = lookupScopeData(actionRequest);
		if (injectData == null) {
			return;
		}

		Target[] targets = actionRequest.getTargets();
		HttpServletRequest servletRequest = actionRequest.getHttpServletRequest();
		HttpSession session = servletRequest.getSession();

		Enumeration attributeNames = session.getAttributeNames();

		while (attributeNames.hasMoreElements()) {
			String attrName = (String) attributeNames.nextElement();

			for (int i = 0; i < targets.length; i++) {
				Target target = targets[i];
				if (injectData[i] == null) {
					continue;
				}
				ScopeData.In[] scopes = injectData[i].in;
				if (scopes == null) {
					continue;
				}

				for (ScopeData.In in : scopes) {
					String name = getMatchedPropertyName(in, attrName);
					if (name != null) {
						Object attrValue = session.getAttribute(attrName);
						setTargetProperty(target, name, attrValue);
					}
				}
			}
		}
	}

	public void outject(ActionRequest actionRequest) {
		ScopeData[] outjectData = lookupScopeData(actionRequest);
		if (outjectData == null) {
			return;
		}

		Target[] targets = actionRequest.getTargets();
		HttpServletRequest servletRequest = actionRequest.getHttpServletRequest();
		HttpSession session = servletRequest.getSession();

		for (int i = 0; i < targets.length; i++) {
			Target target = targets[i];
			if (outjectData[i] == null) {
				continue;
			}
			ScopeData.Out[] scopes = outjectData[i].out;
			if (scopes == null) {
				continue;
			}

			for (ScopeData.Out out : scopes) {
				Object value = getTargetProperty(target, out);
				session.setAttribute(out.name, value);
			}
		}
	}
}