Package org.apache.wicket.markup.head

Class MetaDataHeaderItem

  • All Implemented Interfaces:
    java.io.Serializable, org.apache.wicket.util.io.IClusterable
    Direct Known Subclasses:
    HtmlImportHeaderItem
    public class MetaDataHeaderItem
extends HeaderItem
    HeaderItem for meta information such as <meta> tags or canonical <link>
    Since:
    6.17.0
    Author:
    andrea del bene
    See Also:
    Serialized Form

    • Field Detail

      • META_TAG

        public static final java.lang.String META_TAG
        The meta tag name
        See Also:
        Constant Field Values

      • LINK_TAG

        public static final java.lang.String LINK_TAG
        the link tag name
        See Also:
        Constant Field Values

    • Constructor Detail

      • MetaDataHeaderItem

        public MetaDataHeaderItem​(java.lang.String tagName)
        Build a new MetaDataHeaderItem having tagName as tag.
        Parameters:
        tagName - the name of the tag

    • Method Detail

      • addTagAttribute

        public MetaDataHeaderItem addTagAttribute​(java.lang.String attributeName,
                                          java.lang.Object attributeValue)
        Add a tag attribute to the item. If the attribute value is a IModel, the object wrapped inside the model is used as actual value.
        Parameters:
        attributeName - the attribute name
        attributeValue - the attribute value
        Returns:
        The current item.

      • addTagAttribute

        public MetaDataHeaderItem addTagAttribute​(java.lang.String attributeName)
        Add a minimized tag attribute to the item. The attribute has no value and only its name is rendered (for example 'async')
        Parameters:
        attributeName - the attribute name
        Returns:
        The current item.

      • generateString

        public java.lang.String generateString()
        Generate the string representation for the current item.
        Returns:
        The string representation for the current item.

      • getRenderTokens

        public java.lang.Iterable<?> getRenderTokens()
        Specified by:
        getRenderTokens in class HeaderItem
        Returns:
        The tokens this HeaderItem can be identified by. If any of the tokens has already been rendered, this HeaderItem will not be rendered.

      • render

        public void render​(org.apache.wicket.request.Response response)
        Description copied from class: HeaderItem
        Renders the HeaderItem to the response.
        Specified by:
        render in class HeaderItem

      • forMetaTag

        public static MetaDataHeaderItem forMetaTag​(java.lang.String name,
                                            java.lang.String content)
        Factory method to create <meta> tag.
        Parameters:
        name - the 'name' attribute of the tag
        content - the 'content' attribute of the tag
        Returns:
        A new MetaDataHeaderItem

      • forMetaTag

        public static MetaDataHeaderItem forMetaTag​(IModel<java.lang.String> name,
                                            IModel<java.lang.String> content)
        Factory method to create <meta> tag.
        Parameters:
        name - the 'name' attribute of the tag as String model
        content - the 'content' attribute of the tag as String model
        Returns:
        A new MetaDataHeaderItem

      • forLinkTag

        public static MetaDataHeaderItem forLinkTag​(java.lang.String rel,
                                            java.lang.String href)
        Factory method to create <link> tag.
        Parameters:
        rel - the 'rel' attribute of the tag
        href - the 'href' attribute of the tag
        Returns:
        A new MetaDataHeaderItem

      • forLinkTag

        public static MetaDataHeaderItem forLinkTag​(IModel<java.lang.String> rel,
                                            IModel<java.lang.String> href)
        Factory method to create <link> tag.
        Parameters:
        rel - the 'rel' attribute of the tag as String model
        href - the 'href' attribute of the tag as String model
        Returns:
        A new MetaDataHeaderItem

      • equals

        public boolean equals​(java.lang.Object o)
        Overrides:
        equals in class java.lang.Object

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object