InsertTag.java from Frame2 Web Application Framework at Krugle

Show InsertTag.java syntax highlighted

/*
 * ====================================================================
 *
 * Frame2 Open Source License
 *
 * Copyright (c) 2004-2007 Megatome Technologies.  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.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by
 *        Megatome Technologies."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Frame2 Project", and "Frame2", 
 *    must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact iamthechad@sourceforge.net.
 *
 * 5. Products derived from this software may not be called "Frame2"
 *    nor may "Frame2" appear in their names without prior written
 *    permission of Megatome Technologies.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 MEGATOME TECHNOLOGIES OR
 * ITS 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 org.megatome.frame2.taglib.template.el;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.BodyTag;
import javax.servlet.jsp.tagext.Tag;

import org.megatome.frame2.taglib.template.ServletResponseIncludeWrapper;
import org.megatome.frame2.taglib.template.TemplateConstants;
import org.megatome.frame2.tagsupport.BaseFrame2Tag;
import org.megatome.frame2.template.TemplateConfigFactory;
import org.megatome.frame2.template.TemplateException;
import org.megatome.frame2.template.config.TemplateDefI;

public class InsertTag extends BaseFrame2Tag {

	private static final long serialVersionUID = -844875210406910502L;

	private Map<String, String[]> parameters = new HashMap<String, String[]>();

	private TemplateDefI def = null;

	/**
	 * 
	 */
	public InsertTag() {
		super();
	}

	/**
	 * @return
	 */
	public String getDefinition() {
		return getAttr(TemplateConstants.DEFINITION);
	}

	/**
	 * @param string
	 */
	public void setDefinition(String def) {
		setAttr(TemplateConstants.DEFINITION, def);
	}

	public Map<String, String[]> getParameterMap() {
		return this.parameters;
	}

	public List<String> getParameterNames() {
		return new ArrayList<String>(this.parameters.keySet());
	}

	public void addParameter(String name, String value) {
		String[] newValues = null;
		if (this.parameters.containsKey(name)) {
			String[] origValues = this.parameters.get(name);
			newValues = new String[origValues.length + 1];
			System.arraycopy(origValues, 0, newValues, 0, origValues.length);
		} else {
			newValues = new String[1];
		}
		newValues[newValues.length - 1] = value;
		this.parameters.put(name, newValues);
	}

	public String getParameter(String name) {
		String retValue = null;
		if (this.parameters.containsKey(name)) {
			String[] paramValues = this.parameters.get(name);
			retValue = paramValues[0];
		}

		return retValue;
	}

	public String[] getParameterValues(String name) {
		return this.parameters.get(name);
	}

	public void addParamsToRequest() {
		for (String name : getParameterNames()) {
			this.pageContext.setAttribute(name, getParameterValues(name),
					PageContext.REQUEST_SCOPE);
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.jsp.tagext.TryCatchFinally#doFinally()
	 */
	@Override
	public void doFinally() {
		super.doFinally();
		this.pageContext.removeAttribute(TemplateConstants.FRAME2_INSERT_KEY);
		this.parameters.clear();
		this.def = null;
	}

	/**
	 * @see javax.servlet.jsp.tagext.Tag#doEndTag()
	 */
	@Override
	public int doEndTag() throws JspException {
		super.doEndTag();
		try {
			addParamsToRequest();

			ServletResponseIncludeWrapper wrapper = new ServletResponseIncludeWrapper(
					this.pageContext.getResponse(), this.pageContext.getOut());

			RequestDispatcher rd = this.pageContext.getRequest()
					.getRequestDispatcher(this.def.getTemplateJspPath());
			rd.include(this.pageContext.getRequest(), wrapper);

		} catch (ServletException e) {
			throw new JspException(e);
		} catch (IOException e) {
			throw new JspException(e);
		}

		return Tag.EVAL_PAGE;
	}

	/**
	 * @see javax.servlet.jsp.tagext.Tag#doStartTag()
	 */
	@Override
	public int doStartTag() throws JspException {
		super.doStartTag();
		String definition = evaluateStringAttribute(TemplateConstants.DEFINITION);

		try {
			this.def = TemplateConfigFactory.instance().getDefinition(
					definition);
		} catch (TemplateException e) {
			// We'll throw an error in just a minute, so an empty catch is OK
		}

		if (this.def == null) {
			throw new JspException(
					"Could not access definition for template \"" + definition + "\""); //$NON-NLS-1$ //$NON-NLS-2$
		}
		this.pageContext.setAttribute(TemplateConstants.FRAME2_INSERT_KEY,
				this.def, PageContext.REQUEST_SCOPE);

		return BodyTag.EVAL_BODY_BUFFERED;
	}

	@Override
	protected void setTagName() {
		this.tagName = TemplateConstants.INSERT_TAG;
	}
}
See more files for this project here