/**
*
*/
package org.eclipse.jst.pagedesigner.editors.palette;
import java.util.List;
import org.eclipse.jst.jsf.common.metadata.Entity;
import org.eclipse.jst.jsf.common.metadata.Model;
import org.eclipse.jst.jsf.common.metadata.Trait;
import org.eclipse.jst.jsf.common.metadata.query.ITaglibDomainMetaDataModelContext;
import org.eclipse.jst.jsf.common.metadata.query.TaglibDomainMetaDataQueryHelper;
import org.eclipse.jst.jsf.tagdisplay.internal.paletteinfos.PaletteInfo;
import org.eclipse.jst.jsf.tagdisplay.internal.paletteinfos.PaletteInfos;
import org.eclipse.jst.jsf.tagdisplay.internal.paletteinfos.TagCreationAttribute;
import org.eclipse.jst.jsf.tagdisplay.internal.paletteinfos.TagCreationInfo;
import org.eclipse.jst.pagedesigner.utils.CommandUtil;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;
/**
* A source data that is enhanced by metadata.
*
* @author cbateman
*
*/
public final class MetadataTagDropSourceData implements ITagDropSourceData
{
private final IDOMModel _model;
private final TagCreationInfo _tagCreationInfo;
private final ITagDropSourceData _delegate;
/**
* @param creationProvider
* @param model
*/
public MetadataTagDropSourceData(
final ITagDropSourceData creationProvider,
final IDOMModel model)
{
_delegate = creationProvider;
_model = model;
_tagCreationInfo = getTagCreationInfo();
}
/**
* @return the pre-defined attributes for the tag from meta-data or
* null if none.
*/
public List<TagCreationAttribute> getAttributes()
{
if (_tagCreationInfo != null)
{
return _tagCreationInfo.getAttributes();
}
return null;
}
/**
* @return the template derived from metadata for tag drop or null if none.
*/
public String getTemplate()
{
if (_tagCreationInfo != null)
{
return (String) _tagCreationInfo.getTemplate();
}
return null;
}
public String getDefaultPrefix()
{
return _delegate.getDefaultPrefix();
}
public String getTagName()
{
return _delegate.getTagName();
}
public String getNamespace()
{
return _delegate.getNamespace();
}
private TagCreationInfo getTagCreationInfo()
{
final ITaglibDomainMetaDataModelContext metadataContext = CommandUtil
.getMetadataContext(getNamespace(), _model);
TagCreationInfo tagCreationInfo = null;
String id = getId();
if (metadataContext != null && id != null)
{
tagCreationInfo = createCreationInfo(metadataContext, id,
getTagName());
}
return tagCreationInfo;
}
public String getId()
{
return _delegate.getId();
}
/**
* @param metaDataContext
* @param id
* @param tagName
* @return a tag creation info for the tag and id in the metadata context
*/
static TagCreationInfo createCreationInfo(
final ITaglibDomainMetaDataModelContext metaDataContext,
final String id, final String tagName)
{
final Model model = TaglibDomainMetaDataQueryHelper
.getModel(metaDataContext);
if (model != null)
{
Trait trait = TaglibDomainMetaDataQueryHelper.getTrait(model,
PaletteInfos.TRAIT_ID);
if (trait != null)
{
final PaletteInfos pis = (PaletteInfos) trait.getValue();
final PaletteInfo pi = pis.findPaletteInfoById(id);
if (pi != null)
{
return pi.getTagCreation();
}
}
// tag-creation trait on entity directly?
final Entity tag = getTagEntity(metaDataContext, tagName);
if (tag != null)
{// metadata exists
trait = TaglibDomainMetaDataQueryHelper.getTrait(tag,
"tag-create"); //$NON-NLS-1$
if (trait != null && trait.getValue() != null)
{
return (TagCreationInfo) trait.getValue();
}
}
}
return null;
}
/**
* @param metaDataContext
* @param tagName
* @return the {@link Entity} for this tag element being created
*/
private static Entity getTagEntity(
final ITaglibDomainMetaDataModelContext metaDataContext,
final String tagName)
{
return TaglibDomainMetaDataQueryHelper.getEntity(metaDataContext,
tagName);
}
}