Examples with Tag javax.servlet.jsp.tagext.Tag used on opensource projects

Example 6 with Tag

use of javax.servlet.jsp.tagext.Tag in project sling by apache.

the class TagHandlerPool method get.

/**
     * 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 Tag get(Class handlerClass) throws JspException {
    Tag handler = null;
    synchronized (this) {
        if (current >= 0) {
            handler = handlers[current--];
            return handler;
        }
    }
    // wait for us to construct a tag for this thread.
    try {
        Tag instance = (Tag) handlerClass.newInstance();
        AnnotationHelper.postConstruct(annotationProcessor, instance);
        return instance;
    } catch (Exception e) {
        throw new JspException(e.getMessage(), e);
    }
}

Example 7 with Tag

use of javax.servlet.jsp.tagext.Tag in project spring-framework by spring-projects.

the class TagUtilsTests method hasAncestorOfTypeFalseScenario.

@Test
public void hasAncestorOfTypeFalseScenario() throws Exception {
    Tag a = new TagA();
    Tag b = new TagB();
    Tag anotherB = new TagB();
    a.setParent(b);
    b.setParent(anotherB);
    assertFalse(TagUtils.hasAncestorOfType(a, TagC.class));
}

Example 8 with Tag

use of javax.servlet.jsp.tagext.Tag in project spring-framework by spring-projects.

the class TagUtils method hasAncestorOfType.

/**
	 * Determine whether the supplied {@link Tag} has any ancestor tag
	 * of the supplied type.
	 * @param tag the tag whose ancestors are to be checked
	 * @param ancestorTagClass the ancestor {@link Class} being searched for
	 * @return {@code true} if the supplied {@link Tag} has any ancestor tag
	 * of the supplied type
	 * @throws IllegalArgumentException if either of the supplied arguments is {@code null};
	 * or if the supplied {@code ancestorTagClass} is not type-assignable to
	 * the {@link Tag} class
	 */
public static boolean hasAncestorOfType(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 true;
        }
        ancestor = ancestor.getParent();
    }
    return false;
}