Extend Teaser Component using Sling Model Delegate Pattern

Hi,

I have been trying to extend Teaser component behaviour using Sling Delegate Pattern. I want to overwrite the linkUrl property behaviour but it is not working as expected. The link on the image is always the one which is configured on the component but I expect it to be overwritten by the static link from the below overwritten method.

import com.adobe.cq.export.json.ComponentExporter;
import com.adobe.cq.wcm.core.components.models.ListItem;
import com.adobe.cq.wcm.core.components.models.Teaser;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.models.annotations.DefaultInjectionStrategy;
import org.apache.sling.models.annotations.Model;
import org.apache.sling.models.annotations.Via;
import org.apache.sling.models.annotations.injectorspecific.Self;
import org.apache.sling.models.annotations.via.ResourceSuperType;

import java.util.List;

@Model(
    adaptables = SlingHttpServletRequest.class,
    adapters = {Teaser.class, ComponentExporter.class},
    resourceType = "myproject/components/content/teaser",
    defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL
)
public class CustomTeaserImpl implements Teaser {

    @Self
    @Via(type = ResourceSuperType.class)
    private Teaser teaser;

    @Override
    public String getLinkURL() {
        return "/content/subrato/foo";
    }

    /**
     * Checks if the teaser has Call-to-Action elements
     *
     * @return {@code true} if teaser has CTAs, {@code false} otherwise
     *
     * @since com.adobe.cq.wcm.core.components.models 12.4.0
     */
    @Override
    public boolean isActionsEnabled() {
        return this.teaser.isActionsEnabled();
    }

    /**
     * Returns the list of Call-to-Action elements
     *
     * @return the list of CTAs
     *
     * @since com.adobe.cq.wcm.core.components.models 12.4.0
     */
    @Override
    public List<ListItem> getActions() {
        return this.teaser.getActions();
    }

    /**
     * Returns the image resource for this teaser.
     *
     * @return the image resource for this teaser or {@code null}
     *
     * @since com.adobe.cq.wcm.core.components.models 12.4.0
     */
    @Override
    public Resource getImageResource() {
        return this.teaser.getImageResource();
    }

    /**
     * Checks if the link on the image is hidden.
     *
     * @return {@code true} if link is hidden on the image, {@code false} otherwise
     *
     * @since com.adobe.cq.wcm.core.components.models 12.4.0
     */
    @Override
    public boolean isImageLinkHidden() {
        return this.teaser.isImageLinkHidden();
    }

    /**
     * Returns this teaser's pretitle, if one was defined.
     *
     * @return the teaser's pretitle or {@code null}
     *
     * @since com.adobe.cq.wcm.core.components.models 12.12.0
     */
    @Override
    public String getPretitle() {
        return this.teaser.getPretitle();
    }

    /**
     * Returns this teaser's title, if one was defined.
     *
     * @return the teaser's title or {@code null}
     *
     * @since com.adobe.cq.wcm.core.components.models 12.4.0
     */
    @Override
    public String getTitle() {
        return this.teaser.getTitle();
    }

    /**
     * Checks if the link on the title is hidden.
     *
     * @return {@code true} if link is hidden on the title, {@code false} otherwise
     *
     * @since com.adobe.cq.wcm.core.components.models 12.4.0
     */
    @Override
    public boolean isTitleLinkHidden() {
        return this.teaser.isTitleLinkHidden();
    }

    /**
     * Returns this teaser's description, if one was defined.
     *
     * @return the teaser's description or {@code null}
     *
     * @since com.adobe.cq.wcm.core.components.models 12.4.0
     */
    @Override
    public String getDescription() {
        return this.teaser.getDescription();
    }

    /**
     * Returns the HTML element type (h1-h6) used for the title.
     *
     * @return the element type
     *
     * @since com.adobe.cq.wcm.core.components.models 12.4.0
     */
    @Override
    public String getTitleType() {
        return this.teaser.getTitleType();
    }

    /**
     * @since com.adobe.cq.wcm.core.components.models 12.4.0
     */
    @Override
    public String getExportedType() {
        return this.teaser.getExportedType();
    }
}

@theo_pendle