wffweb/src/main/java/com/webfirmframework/wffweb/tag/repository/TagRepository.java
public Collection<AbstractAttribute> findAttributesByTagName(
            final boolean parallel, final String tagName)
            throws NullValueException {

        if (tagName == null) {
            throw new NullValueException("The tagName should not be null");
        }

        final Collection<Lock> locks = getReadLocks(rootTags);
        for (final Lock lock : locks) {
            lock.lock();
        }

        try {
            final Stream<AbstractAttribute> attributesStream = buildAllTagsStream(
                    parallel)
                            .filter(tag -> tagName.equals(tag.getTagName())
                                    && tag.getAttributes() != null)
                            .map(tag -> {
                                return tag.getAttributes();
                            }).flatMap(attributes -> attributes.stream());

            return attributesStream.collect(Collectors.toSet());
        } finally {
            for (final Lock lock : locks) {
                lock.unlock();
            }
        }
    }
public Collection<AbstractAttribute> findAttributesByTagName(
            final boolean parallel, final String tagName)
            throws NullValueException {

        if (tagName == null) {
            throw new NullValueException("The tagName should not be null");
        }

        final Collection<Lock> locks = getReadLocks(rootTags);
        for (final Lock lock : locks) {
            lock.lock();
        }

        try {
            final Stream<AbstractAttribute> attributesStream = buildAllTagsStream(
                    parallel)
                            .filter(tag -> tagName.equals(tag.getTagName())
                                    && tag.getAttributes() != null)
                            .map(tag -> {
                                return tag.getAttributes();
                            }).flatMap(attributes -> attributes.stream());

            return attributesStream.collect(Collectors.toSet());
        } finally {
            for (final Lock lock : locks) {
                lock.unlock();
            }
        }
    }
Finds and returns the collection of attributes (including from nested
tags) of the tags matching with the give tag name.

@param parallel
true to internally use parallel stream. If true it
will split the finding task to different batches and
will execute the batches in different threads in
parallel consuming all CPUs. It will perform faster
in finding from extremely large number of tags but at
the same time it will less efficient in finding from
small number of tags.
@param tagName
the name of the tag.
@return the collection of attributes of the tags matching with the given
tag name.
@throws NullValueException
if the {@code tagName} is null
@since 3.0.0
@author WFF