HumanizeSupport.java

package org.apache.taglibs.standard.tag.common.fmt;

import java.io.IOException;
import java.util.Locale;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.BodyTagSupport;

import org.apache.taglibs.standard.tag.common.core.Util;

public abstract class HumanizeSupport extends BodyTagSupport
{

    private static final long serialVersionUID = 106589551951164935L;

    private String var; // 'var' attribute
    private int scope; // 'scope' attribute
    protected boolean resolveLocale;

    public HumanizeSupport()
    {

        super();
        init();

    }

    @Override
    public int doEndTag() throws JspException
    {

        begin();

        if (isContextRemoveNeeded())
        {
            // Spec says:
            // If value is null or empty, remove the scoped variable
            // if it is specified (see attributes var and scope).
            if (var != null)
            {
                pageContext.removeAttribute(var, scope);
            }
            return EVAL_PAGE;
        }

        // Determine formatting locale
        Locale loc = resolveLocale ? SetLocaleSupport.getFormattingLocale(pageContext) : null;

        // Render
        String formatted = loc == null ? render() : render(loc);

        if (var != null)
        {
            pageContext.setAttribute(var, formatted, scope);
        } else
        {
            try
            {
                pageContext.getOut().print(formatted);
            } catch (IOException ioe)
            {
                throw new JspTagException(ioe.toString(), ioe);
            }
        }

        return end();
    }

    @Override
    public void release()
    {

        init();

    }

    public void setScope(String scope)
    {

        this.scope = Util.getScope(scope);
    }

    public void setVar(String var)
    {

        this.var = var;
    }

    abstract protected void begin() throws JspException;

    abstract protected void clean();

    protected int end()
    {

        return EVAL_PAGE;

    }

    protected void init()
    {

        this.resolveLocale = true;
        this.var = null;
        this.scope = PageContext.REQUEST_SCOPE;

        clean();

    }

    protected String inputFromBody()
    {

        return (bodyContent != null && bodyContent.getString() != null) ? bodyContent.getString().trim() : null;

    }

    protected boolean isEmpty(String str)
    {

        return str == null || str.length() < 1;

    }

    abstract protected boolean isContextRemoveNeeded();

    abstract protected String render() throws JspException;

    abstract protected String render(Locale locale) throws JspException;

}