private int getMetadataSchemaID(DCValue dcv) throws SQLException {
int schemaID;
MetadataSchema schema = MetadataSchema.find(ourContext, dcv.schema);
if (schema == null) {
schemaID = MetadataSchema.DC_SCHEMA_ID;
} else {
schemaID = schema.getSchemaID();
}
return schemaID;
}
List<DCValue> get(Context c, int resourceId, int resourceTypeId, Logger log)
throws SQLException {
if (metadata == null) {
metadata = new ArrayList<DCValue>();
// Get Dublin Core metadata
TableRowIterator tri = retrieveMetadata(resourceId, resourceTypeId);
if (tri != null) {
try {
while (tri.hasNext()) {
TableRow resultRow = tri.next();
// Get the associated metadata field and schema information
int fieldID = resultRow.getIntColumn("metadata_field_id");
MetadataField field = MetadataField.find(c, fieldID);
if (field == null) {
log.error("Loading item - cannot find metadata field " + fieldID);
} else {
MetadataSchema schema = MetadataSchema.find(c, field.getSchemaID());
if (schema == null) {
log.error(
"Loading item - cannot find metadata schema "
+ field.getSchemaID()
+ ", field "
+ fieldID);
} else {
// Make a DCValue object
DCValue dcv = new DCValue();
dcv.element = field.getElement();
dcv.qualifier = field.getQualifier();
dcv.value = resultRow.getStringColumn("text_value");
dcv.language = resultRow.getStringColumn("text_lang");
// dcv.namespace = schema.getNamespace();
dcv.schema = schema.getName();
dcv.authority = resultRow.getStringColumn("authority");
dcv.confidence = resultRow.getIntColumn("confidence");
// Add it to the list
metadata.add(dcv);
}
}
}
} finally {
// close the TableRowIterator to free up resources
if (tri != null) {
tri.close();
}
}
}
}
return metadata;
}
/**
* Utility method for pattern-matching metadata elements. This method will return <code>true
* </code> if the given schema, element, qualifier and language match the schema, element,
* qualifier and language of the <code>DCValue</code> object passed in. Any or all of the element,
* qualifier and language passed in can be the <code>Item.ANY</code> wildcard.
*
* @param schema the schema for the metadata field. <em>Must</em> match the <code>name</code> of
* an existing metadata schema.
* @param element the element to match, or <code>Item.ANY</code>
* @param qualifier the qualifier to match, or <code>Item.ANY</code>
* @param language the language to match, or <code>Item.ANY</code>
* @param metadataValue the Dublin Core value
* @return <code>true</code> if there is a match
*/
protected boolean match(
String schema,
String element,
String qualifier,
String language,
MetadataValue metadataValue) {
MetadataField metadataField = metadataValue.getMetadataField();
MetadataSchema metadataSchema = metadataField.getMetadataSchema();
// We will attempt to disprove a match - if we can't we have a match
if (!element.equals(Item.ANY) && !element.equals(metadataField.getElement())) {
// Elements do not match, no wildcard
return false;
}
if (qualifier == null) {
// Value must be unqualified
if (metadataField.getQualifier() != null) {
// Value is qualified, so no match
return false;
}
} else if (!qualifier.equals(Item.ANY)) {
// Not a wildcard, so qualifier must match exactly
if (!qualifier.equals(metadataField.getQualifier())) {
return false;
}
}
if (language == null) {
// Value must be null language to match
if (metadataValue.getLanguage() != null) {
// Value is qualified, so no match
return false;
}
} else if (!language.equals(Item.ANY)) {
// Not a wildcard, so language must match exactly
if (!language.equals(metadataValue.getLanguage())) {
return false;
}
}
if (!schema.equals(Item.ANY)) {
if (metadataSchema != null && !metadataSchema.getName().equals(schema)) {
// The namespace doesn't match
return false;
}
}
// If we get this far, we have a match
return true;
}
@Override
public MetadataField create(
Context context,
MetadataSchema metadataSchema,
String element,
String qualifier,
String scopeNote)
throws AuthorizeException, SQLException, NonUniqueMetadataException {
// Check authorisation: Only admins may create DC types
if (!authorizeService.isAdmin(context)) {
throw new AuthorizeException("Only administrators may modify the metadata registry");
}
// Ensure the element and qualifier are unique within a given schema.
if (hasElement(context, -1, metadataSchema, element, qualifier)) {
throw new NonUniqueMetadataException(
"Please make "
+ element
+ "."
+ qualifier
+ " unique within schema #"
+ metadataSchema.getSchemaID());
}
// Create a table row and update it with the values
MetadataField metadataField = new MetadataField();
metadataField.setElement(element);
metadataField.setQualifier(qualifier);
metadataField.setScopeNote(scopeNote);
metadataField.setMetadataSchema(metadataSchema);
metadataField = metadataFieldDAO.create(context, metadataField);
metadataFieldDAO.save(context, metadataField);
log.info(
LogManager.getHeader(
context, "create_metadata_field", "metadata_field_id=" + metadataField.getFieldID()));
return metadataField;
}
/**
* Full constructor for new metadata field elements.
*
* @param schema schema to which the field belongs
* @param element element of the field
* @param qualifier qualifier of the field
* @param scopeNote scope note of the field
*/
public MetadataField(MetadataSchema schema, String element, String qualifier, String scopeNote) {
this.schemaID = schema.getSchemaID();
this.element = element;
this.qualifier = qualifier;
this.scopeNote = scopeNote;
}
/**
* Constructor creating a field within a schema.
*
* @param schema schema to which the field belongs
*/
public MetadataField(MetadataSchema schema) {
this.schemaID = schema.getSchemaID();
}
