Example usage for javax.servlet.jsp.tagext Tag getParent

Introduction

In this page you can find the example usage for javax.servlet.jsp.tagext Tag getParent.

Prototype

Tag getParent();

Source Link

Document

Get the parent (closest enclosing tag handler) for this tag handler.

Usage

From source file:net.mlw.vlh.web.util.JspUtils.java

public static Tag getParent(Tag self, Class klass) throws JspException {
    Tag tag = self.getParent();

    while (!(klass.isAssignableFrom(tag.getClass()))) {
        tag = tag.getParent();//from ww w .j  av a  2 s  .c om
        if (tag == null) {
            final String message = "Parent tag of class " + klass + " of the tag's class " + self
                    + " was not found.";
            LOGGER.error(message);
            throw new JspException(message);
        }
    }
    return tag;
}

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From source file:org.hdiv.web.util.TagUtils.java

/**
 * Determine whether the supplied {@link Tag} has any ancestor tag of the
 * supplied type.//ww  w  .  ja  va2s. c  o m
 * 
 * @param tag the tag whose ancestors are to be checked
 * @param ancestorTagClass the ancestor {@link Class} being searched for
 * @return <code>true</code> if the supplied {@link Tag} has any ancestor
 *         tag of the supplied type
 * @throws IllegalArgumentException if either of the supplied arguments is
 *             <code>null</code>; or if the supplied
 *             <code>ancestorTagClass</code> is not type-assignable to the
 *             {@link Tag} class
 */
public static Tag getAncestorOfType(Tag tag, Class ancestorTagClass) {

    Assert.notNull(tag, "Tag cannot be null");
    Assert.notNull(ancestorTagClass, "Ancestor tag class cannot be null");
    if (!Tag.class.isAssignableFrom(ancestorTagClass)) {
        throw new IllegalArgumentException(
                "Class '" + ancestorTagClass.getName() + "' is not a valid Tag type");
    }
    Tag ancestor = tag.getParent();
    while (ancestor != null) {
        if (ancestorTagClass.isAssignableFrom(ancestor.getClass())) {
            return ancestor;
        }
        ancestor = ancestor.getParent();
    }
    return null;
}

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From source file:lucee.runtime.tag.MailParam.java

@Override
public int doStartTag() throws PageException {

    if (content != null) {
        required("mailparam", "file", file);
        String filename = ListUtil.last(file, "/\\", true);
        Resource res = SystemUtil.getTempDirectory().getRealResource(filename);
        if (res.exists())
            ResourceUtil.removeEL(res, true);
        try {//www.j  a  va 2 s .c  om
            IOUtil.write(res, content);
        } catch (IOException e) {
            throw Caster.toPageException(e);
        }
        this.file = ResourceUtil.getCanonicalPathEL(res);
        remove = true;
    } else if (!StringUtil.isEmpty(this.file)) {
        Resource res = ResourceUtil.toResourceNotExisting(pageContext, this.file);
        if (res != null) {
            if (res.exists())
                pageContext.getConfig().getSecurityManager().checkFileLocation(res);
            this.file = ResourceUtil.getCanonicalPathEL(res);
        }
    }

    // check attributes
    boolean hasFile = !StringUtil.isEmpty(file);
    boolean hasName = !StringUtil.isEmpty(name);
    // both attributes
    if (hasName && hasFile) {
        throw new ApplicationException(
                "Wrong Context for tag MailParam, you cannot use attribute file and name together");
    }
    // no attributes
    if (!hasName && !hasFile) {
        throw new ApplicationException(
                "Wrong Context for tag MailParam, you must use attribute file or attribute name for this tag");
    }

    // get Mail Tag
    Tag parent = getParent();
    while (parent != null && !(parent instanceof Mail)) {
        parent = parent.getParent();
    }

    if (parent instanceof Mail) {
        Mail mail = (Mail) parent;
        mail.setParam(type, file, name, value, disposition, contentID, remove);
    } else {
        throw new ApplicationException("Wrong Context, tag MailParam must be inside a Mail tag");
    }
    return SKIP_BODY;
}

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From source file:com.wabacus.system.tags.component.AbsComponentTag.java

protected AbsComponentTag getMyComponentParentTag() {
    Tag tagParent = this.getParent();
    while (tagParent != null) {
        if (tagParent instanceof AbsComponentTag) {//?
            return (AbsComponentTag) tagParent;
        }/*from   w ww  . j av  a  2 s  .com*/
        tagParent = tagParent.getParent();
    }
    return null;
}

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From source file:com.adito.core.CoreUtil.java

/**
 * @param clazz/* w  ww .  jav a 2 s  .c o  m*/
 * @param tag
 * @return Tag
 */
public static Tag getParentTagOfClass(Class clazz, Tag tag) {
    while ((tag = tag.getParent()) != null) {
        if (tag.getClass().equals(clazz)) {
            return tag;
        }
    }
    return null;
}

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From source file:com.redhat.rhn.frontend.taglibs.ColumnTag.java

/**
 * Returns the ListDisplayTag that serves as the parent tag.
 * Returns null if no ListDisplayTag is found.
 * @return the parent ListDisplayTag//from   w  ww. j  a v a 2s. co  m
 */
public ListDisplayTag findListDisplay() {
    Tag tagParent = getParent();
    while (tagParent != null && !(tagParent instanceof ListDisplayTag)) {
        tagParent = tagParent.getParent();
    }
    return (ListDisplayTag) tagParent;
}

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From source file:com.redhat.rhn.frontend.taglibs.ColumnTag.java

/**
 * Returns the ListDisplayTag that serves as the parent tag.
 * Returns null if no ListDisplayTag is found.
 * @return the parent ListDisplayTag//from ww w. j a va 2s  . c  o  m
 */
public UnpagedListDisplayTag findUnpagedListDisplay() {
    Tag tagParent = getParent();
    while (tagParent != null && !(tagParent instanceof UnpagedListDisplayTag)) {
        tagParent = tagParent.getParent();
    }
    return (UnpagedListDisplayTag) tagParent;
}

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From source file:org.apache.struts.faces.taglib.JavascriptValidatorTag.java

/**
 * <p>Return the <code>clientId</code> of the form component for which
 * we are rendering validation Javascript.</p>
 *
 * @exception IllegalStateException if we are not nested inside a
 *  UIComponentTag with a child FormComponent matching our form name
 *//*from www .j a  v a 2s .  com*/
private String getFormClientId() {

    // Return any cached value
    if (formClientId != null) {
        return (formClientId);
    }

    // Locate our parent tag that is a component tag
    Tag parent = getParent();
    while (parent != null) {
        if (parent instanceof UIComponentTag) {
            break;
        }
        parent = parent.getParent();
    }
    if (parent == null) {
        throw new IllegalArgumentException("Not nested inside a UIComponentTag");
    }

    // Are we nested inside our corresponding form tag?
    UIComponent parentComponent = ((UIComponentTag) parent).getComponentInstance();
    if (parentComponent instanceof FormComponent) {
        if (formName.equals((String) parentComponent.getAttributes().get("beanName"))) {
            formClientId = parentComponent.getClientId(FacesContext.getCurrentInstance());
            return (formClientId);
        }
    }

    // Scan the children of this tag's component
    Iterator kids = ((UIComponentTag) parent).getComponentInstance().getChildren().iterator();
    while (kids.hasNext()) {
        UIComponent kid = (UIComponent) kids.next();
        if (!(kid instanceof FormComponent)) {
            continue;
        }
        if (formName.equals((String) kid.getAttributes().get("beanName"))) {
            formClientId = kid.getClientId(FacesContext.getCurrentInstance());
            return (formClientId);
        }
    }
    throw new IllegalArgumentException("Cannot find child FormComponent for form '" + formName + "'");

}

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From source file:org.jboss.dashboard.ui.taglib.formatter.FragmentValueTag.java

public final int doStartTag() throws JspException {
    try {/*  ww  w . ja  v a 2 s  .co  m*/
        Tag parentTag = getParent();
        while (parentTag instanceof FragmentValueTag) {
            parentTag = parentTag.getParent();
        }
        if (!(parentTag instanceof FragmentTag))
            throw new JspException(
                    "Wrong nesting: fragmentValue named " + name + " must be inside a fragment.");
        FragmentTag parentFragment = (FragmentTag) parentTag;
        value = parentFragment.getParam(name);

        String valueName = id == null ? VALUE_NAME : id;
        if (value == null)
            pageContext.removeAttribute(valueName);
        else
            pageContext.setAttribute(valueName, value);
    } catch (Exception e) {
        log.error("Error:", e);
        throw new JspException(e);
    }
    return EVAL_BODY_AGAIN;
}

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From source file:org.squale.welcom.taglib.button.ButtonTag.java

/**
 * @return retourne le formulaire contenant ce bouton
 *///from  w  ww  . j  a  v  a  2 s. c  o m
private FormTag getFormTag() {
    Tag tag = getParent();
    while (tag != null) {
        if (tag instanceof FormTag) {
            return (FormTag) tag;
        }
        tag = tag.getParent();
    }
    return null;
}

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