/***************************************************************************** * * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. * ****************************************************************************/ package org.apache.padaf.xmpbox.parser; import java.lang.reflect.Constructor; import java.util.ArrayList; import java.util.List; import org.apache.padaf.xmpbox.XMPMetadata; import org.apache.padaf.xmpbox.schema.XMPSchema; /** * A factory for each kind of schemas * * @author a183132 * */ public class XMPSchemaFactory { protected String namespace; protected Class<? extends XMPSchema> schemaClass; protected PropMapping propDef; protected String nsName; protected boolean isDeclarative; protected List<PropMapping> importedPropertyMapping = new ArrayList<PropMapping>(); /** * 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, PropMapping propDef) { this.isDeclarative = false; this.namespace = namespace; this.schemaClass = schemaClass; this.propDef = propDef; } /** * Factory constructor for declarative XMP Schemas * * @param nsName * namespace name to treat * @param namespace * namespace URI to treat * @param schemaClass * Class representation associated to this URI * @param propDef * Properties Types list associated */ public XMPSchemaFactory(String nsName, String namespace, Class<? extends XMPSchema> schemaClass, PropMapping propDef) { this.isDeclarative = true; this.namespace = namespace; this.schemaClass = schemaClass; this.propDef = propDef; this.nsName = nsName; } public void importXMPSchemaFactory(XMPSchemaFactory externalFactory) throws XmpSchemaException { if (!this.namespace.equals(externalFactory.namespace)) { throw new XmpSchemaException("Unable to import a XMPSchemaFactory if the namespace is different." + " - expected : " + this.namespace + " - import : " + externalFactory.namespace); } this.importedPropertyMapping.add(externalFactory.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 String getPropertyType(String name) { String result = propDef.getPropertyType(name); if (result == null) { for (PropMapping mapping : importedPropertyMapping) { result = mapping.getPropertyType(name); if (result != null) { break; } } } return result; } /** * Get attributes declared for a property (NOT USED YET) * * @param name * The property Name * @return List of all attributes defined for this property */ public List<String> getPropertyAttributes(String name) { List<String> result = propDef.getPropertyAttributes(name); if (result == null) { for (PropMapping mapping : importedPropertyMapping) { result = mapping.getPropertyAttributes(name); if (result != null) { break; } } } return result; } /** * 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 */ @SuppressWarnings("unchecked") public XMPSchema createXMPSchema(XMPMetadata metadata, String prefix) throws XmpSchemaException { XMPSchema schema = null; Class[] argsClass; Object[] schemaArgs; if (isDeclarative) { argsClass = new Class[] { XMPMetadata.class, String.class, String.class }; schemaArgs = new Object[] { metadata, nsName, namespace }; } 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 }; } Constructor<? extends XMPSchema> schemaConstructor; try { schemaConstructor = schemaClass.getConstructor(argsClass); schema = schemaConstructor.newInstance(schemaArgs); if (schema != null) { metadata.addSchema(schema); } return schema; } catch (Exception e) { throw new XmpSchemaException( "Cannot Instanciate specified Object Schema", e); } } }