public JspContextWrapper(JspTag jspTag, JspContext jspContext,
        ArrayList<String> nestedVars, ArrayList<String> atBeginVars,
        ArrayList<String> atEndVars, Map<String,String> aliases) {
    this.jspTag = jspTag;
    this.invokingJspCtxt = (PageContext) jspContext;
    if (jspContext instanceof JspContextWrapper) {
        rootJspCtxt = ((JspContextWrapper)jspContext).rootJspCtxt;
    }
    else {
        rootJspCtxt = invokingJspCtxt;
    }
    this.nestedVars = nestedVars;
    this.atBeginVars = atBeginVars;
    this.atEndVars = atEndVars;
    this.pageAttributes = new HashMap<>(16);
    this.aliases = aliases;

    if (nestedVars != null) {
        this.originalNestedVars = new HashMap<>(nestedVars.size());
    } else {
        this.originalNestedVars = null;
    }
    syncBeginTagFile();
}
 

protected void init( ServletConfig config ) {
    int maxSize=-1;
    String maxSizeS=getOption(config, OPTION_MAXSIZE, null);
    if( maxSizeS != null ) {
        try {
            maxSize=Integer.parseInt(maxSizeS);
        } catch( Exception ex) {
            maxSize=-1;
        }
    }
    if( maxSize <0  ) {
        maxSize=Constants.MAX_POOL_SIZE;
    }
    this.handlers = new JspTag[maxSize];
    this.current = -1;

    this.resourceInjector = (ResourceInjector)
        config.getServletContext().getAttribute(
            Constants.JSP_RESOURCE_INJECTOR_CONTEXT_ATTRIBUTE);
}
 

/**
 * Gets the next available tag handler from this tag handler pool,
 * instantiating one if this tag handler pool is empty.
 *
 * @param handlerClass Tag handler class
 *
 * @return Reused or newly instantiated tag handler
 *
 * @throws JspException if a tag handler cannot be instantiated
 */
public <T extends JspTag> JspTag get(Class<T> handlerClass)
        throws JspException {
    synchronized( this ) {
        if (current >= 0) {
            return handlers[current--];
        }
    }

    // Out of sync block - there is no need for other threads to
    // wait for us to construct a tag for this thread.
    JspTag tagHandler = null;
    try {
        if (resourceInjector != null) {
            tagHandler = resourceInjector.createTagHandlerInstance(
                handlerClass);
        } else {
            tagHandler = handlerClass.newInstance();
        }
    } catch (Exception e) {
        throw new JspException(e.getMessage(), e);
    }

    return tagHandler;
}
 

/**
 * Adds the given tag handler to this tag handler pool, unless this tag
 * handler pool has already reached its capacity, in which case the tag
 * handler's release() method is called.
 *
 * @param handler JspTag handler to add to this tag handler pool
 */
public void reuse(JspTag handler) {
    synchronized( this ) {
        if (current < (handlers.length - 1)) {
            handlers[++current] = handler;
            return;
        }
    }
    // There is no need for other threads to wait for us to release
    if (handler instanceof Tag) {
        ((Tag)handler).release();
    }

    if (resourceInjector != null) {
        resourceInjector.preDestroy(handler);
    }
}
 

@Override
public void setParent(JspTag parent) {
	if (parent != null && this.parents.size() > 0) {
		boolean valid = false;
		for (Class<? extends BaseTag> clazz : this.parents) {
			if (clazz.isAssignableFrom(parent.getClass())) {
				valid = true;
				break;
			}
		}
		if (!valid) {
			final StringBuilder error = new StringBuilder("Invalid parent for ");
			error.append(this).append(": ").append(parent);
			throw new IllegalArgumentException(error.toString());
		}
	}
	this.parent = parent;		
	super.setParent(parent);
}
 

/**
 * {@link ParameterAware}を探して、コールバックします。
 * まず、直接の親タグが{@link ParameterAware}かどうか判定します。
 * そうであれば、コールバックして終了します。
 * もし、直接の親タグが{@link ParameterAware}ない場合、
 * {@link SimpleTagSupport#findAncestorWithClass(JspTag, Class)}を利用して、
 * ルートまで{@link ParameterAware}を探して辿ります。
 * それでも見つからない場合、処理を終了します。
 * @throws JspException {@link JspException}
 * @throws IOException {@link IOException}
 */
@Override
public void doTag() throws JspException, IOException {
    super.doTag();
    Args.checkNotEmpty(getName());
    JspTag s = getParent();
    if (!ParameterAware.class.isInstance(s)) {
        s = SimpleTagSupport.findAncestorWithClass(this, ParameterAware.class);
    }
    if (s == null) return;
    ParameterAware parent = (ParameterAware) s;
    if (getValues() != null) {
        parent.awareParameter(name, getValues());
    } else {
        parent.awareParameter(name, getValue());
    }

}
 

/**
 * If necessary, wraps a {@link SimpleTag} into a {@link Tag}.
 *
 * @param tag The tag to (possibly) wrap.
 * @return The wrapped tag, or the tag passed as parameter if it was not necessary.
 */
public static Tag wrapTag(JspTag tag) {
    if (tag == null) {
        return null;
    }
    if (tag instanceof Tag)
    {
        return (Tag) tag;
    }
    if (tag instanceof SimpleTag)
    {
        return new TagAdapter((SimpleTag) tag);
    }
    throw new VelocityToolsJspException(
            "Cannot get tag that is not a Tag nor a SimpleTag, class "
                    + tag.getClass().getCanonicalName());
}
 

public JspFragmentHelper( int discriminator, JspContext jspContext,
    JspTag parentTag )
{
    this.discriminator = discriminator;
    this.jspContext = jspContext;
    if(jspContext instanceof PageContext) {
        _jspx_page_context = (PageContext)jspContext;
    } else {
        _jspx_page_context = null;
    }
    this.parentTag = parentTag;
}
 

@Override
public void setParent(JspTag parent) {
	if (parent instanceof Nav) {
		super.setElement("li");
	}
	super.setParent(parent);
}
 

@Override
public void setParent(JspTag parent) {
	if (parent instanceof Container) {
		throw new IllegalArgumentException("Bootstrap containers may not be nested");
	}
	super.setParent(parent);
}
 

@Override
public void setParent(JspTag parent) {
	if (parent != null) {
		final Carousel carousel = (Carousel) parent;
		super.setAttribute("href", "#" + carousel.getId(true));
	}
}
 

@Override
public void setParent(JspTag parent) {
	if (parent != null) {
		if (parent instanceof Carousel) {
			((Carousel) parent).addItem(this);
		}
	}
	super.setParent(parent);
}
 

@Override
public void setParent(JspTag parent) {
	if (parent instanceof Carousel) {
		this.carousel = (Carousel) parent;
	}
	super.setParent(parent);
}
 

@Override
public void doTag() throws JspException, IOException {
	final JspTag parent = super.getParent();
	if (parent instanceof ButtonGroup) {
		final ButtonGroup buttonGroup = (ButtonGroup) parent;
		if (buttonGroup.getFacet(JustifiedFacet.class).getValue()) {
			if ("button".equals(super.getElement())) {
				super.wrapIn(new ButtonGroup());
				return;
			}
		}
	}
	super.doTag();
}
 

@Override
public void setParent(JspTag parent) {
	if (parent instanceof Nav) {
		super.setElement("li");
	}
	super.setParent(parent);
}
 

@Override
public boolean isEEComponent(final Class<?> impl) {
    return Servlet.class.isAssignableFrom(impl)
            || Filter.class.isAssignableFrom(impl)
            || ServletContextListener.class.isAssignableFrom(impl)
            || JspTag.class.isAssignableFrom(impl);
}
 

/**
 * Test method for {@link org.apache.velocity.tools.view.jsp.jspimpl.JspUtils#setLatestTag(org.apache.velocity.context.Context, javax.servlet.jsp.tagext.JspTag)}.
 */
@Test
public void testSetLatestTag()
{
    Context context = createMock(Context.class);
    JspTag tag = createMock(JspTag.class);

    expect(context.put(LATEST_TAG_ATTRIBUTE_NAME, tag)).andReturn(null);

    replay(context, tag);
    JspUtils.setLatestTag(context, tag);
    verify(context, tag);
}
 

/**
 * Test method for {@link org.apache.velocity.tools.view.jsp.jspimpl.JspUtils#getLatestJspTag(org.apache.velocity.context.Context)}.
 */
@Test
public void testGetLatestJspTag()
{
    Context context = createMock(Context.class);
    JspTag tag = createMock(JspTag.class);

    expect(context.get(LATEST_TAG_ATTRIBUTE_NAME)).andReturn(tag);

    replay(context, tag);
    assertSame(tag, JspUtils.getLatestJspTag(context));
    verify(context, tag);
}
 

private ELContextWrapper(ELContext wrapped, JspTag jspTag, PageContext pageContext) {
    this.wrapped = wrapped;
    this.jspTag = jspTag;
    this.pageContext = pageContext;
}
 

public JspTag getParentTag() {
    return this.parentTag;
}
 

public JspTag getParent() {
	return null;
}
 

public JspTag getParent() {
	return null;
}
 

public JspTag getParentTag() {
    return this.parentTag;
}
 

public JspTag getParentTag() {
    return this.parentTag;
}
 

public JspTag getParentTag() {
    return this.parentTag;
}
 

public JspTag getParent() {
	return this.parent;
}
 

public void setParent(JspTag arg0) {

	}
 

public void setParent(JspTag arg0) {

	}
 

/**
    * Constructs a tag handler pool with the given capacity.
    *
    * @param capacity Tag handler pool capacity
    * @deprecated Use static getTagHandlerPool
    */
   public TagHandlerPool(int capacity) {
this.handlers = new JspTag[capacity];
this.current = -1;
   }
 

/**
 * Instantiates and injects the given tag handler class.
 *
 * @param clazz the tag handler class to be instantiated and injected
 *
 * @throws Exception if an error has occurred during instantiation or
 * injection
 */
public <T extends JspTag> T createTagHandlerInstance(Class<T> clazz)
        throws Exception;