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package org.apache.xmpbox.schema;
import org.apache.xmpbox.XMPMetadata;
import org.apache.xmpbox.type.PropertiesDescription;
import org.apache.xmpbox.type.PropertyType;
/**
* A factory for each kind of schemas
*
* @author a183132
*
*/
public class XMPSchemaFactory
{
private final String namespace;
private final Class<? extends XMPSchema> schemaClass;
private final PropertiesDescription propDef;
private String nsName;
/**
* Factory Constructor for basic known schemas
*
* @param namespace
* namespace URI to treat
* @param schemaClass
* Class representation associated to this URI
* @param propDef
* Properties Types list associated
*/
public XMPSchemaFactory(String namespace, Class<? extends XMPSchema> schemaClass, PropertiesDescription propDef)
{
this.namespace = namespace;
this.schemaClass = schemaClass;
this.propDef = propDef;
}
/**
* Get namespace URI treated by this factory
*
* @return The namespace URI
*/
public String getNamespace()
{
return namespace;
}
/**
* Get type declared for the name property given
*
* @param name
* The property name
* @return null if propery name is unknown
*/
public PropertyType getPropertyType(String name)
{
return propDef.getPropertyType(name);
}
/**
* Create a schema that corresponding to this factory and add it to metadata
*
* @param metadata
* Metadata to attach the Schema created
* @param prefix
* The namespace prefix (optional)
* @return the schema created and added to metadata
* @throws XmpSchemaException
* When Instancing specified Object Schema failed
*/
public XMPSchema createXMPSchema(XMPMetadata metadata, String prefix) throws XmpSchemaException
{
XMPSchema schema;
Class<?>[] argsClass;
Object[] schemaArgs;
if (schemaClass == XMPSchema.class)
{
argsClass = new Class[] { XMPMetadata.class, String.class, String.class };
schemaArgs = new Object[] { metadata, namespace, nsName };
}
else if (prefix != null && !"".equals(prefix))
{
argsClass = new Class[] { XMPMetadata.class, String.class };
schemaArgs = new Object[] { metadata, prefix };
}
else
{
argsClass = new Class[] { XMPMetadata.class };
schemaArgs = new Object[] { metadata };
}
try
{
schema = schemaClass.getDeclaredConstructor(argsClass).newInstance(schemaArgs);
if (schema != null)
{
metadata.addSchema(schema);
}
return schema;
}
catch (Exception e)
{
throw new XmpSchemaException("Cannot instanciate specified object schema", e);
}
}
public PropertiesDescription getPropertyDefinition()
{
return this.propDef;
}
}