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- /*
- * 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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.render;
-
- import org.apache.avalon.framework.configuration.Configuration;
- import org.apache.avalon.framework.configuration.ConfigurationException;
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
- import org.apache.fop.apps.FOPException;
- import org.apache.fop.apps.FOUserAgent;
-
- /**
- * Configurator for XMLHandler objects.
- */
- public class XMLHandlerConfigurator extends AbstractRendererConfigurator {
-
- /** logger instance */
- protected static Log log = LogFactory.getLog(XMLHandlerConfigurator.class);
-
- /**
- * Default constructor
- * @param userAgent the user agent
- */
- public XMLHandlerConfigurator(FOUserAgent userAgent) {
- super(userAgent);
- }
-
- /**
- * Returns the configuration subtree for a specific renderer.
- * @param cfg the renderer configuration
- * @param namespace the namespace (i.e. the XMLHandler) for which the configuration should
- * be returned
- * @return the requested configuration subtree, null if there's no configuration
- */
- private Configuration getHandlerConfig(Configuration cfg, String namespace) {
- if (cfg == null || namespace == null) {
- return null;
- }
- Configuration handlerConfig = null;
-
- Configuration[] children = cfg.getChildren("xml-handler");
- for (int i = 0; i < children.length; ++i) {
- try {
- if (children[i].getAttribute("namespace").equals(namespace)) {
- handlerConfig = children[i];
- break;
- }
- } catch (ConfigurationException e) {
- // silently pass over configurations without namespace
- }
- }
- if (log.isDebugEnabled()) {
- log.debug((handlerConfig == null ? "No" : "")
- + "XML handler configuration found for namespace " + namespace);
- }
- return handlerConfig;
- }
-
- /**
- * Configures renderer context by setting the handler configuration on it.
- * @param context the RendererContext (contains the user agent)
- * @param ns the Namespace of the foreign object
- * @throws FOPException if configuring the target objects fails
- */
- public void configure(RendererContext context, String ns) throws FOPException {
- //Optional XML handler configuration
- Configuration cfg = getRendererConfig(context.getRenderer());
- if (cfg != null) {
- cfg = getHandlerConfig(cfg, ns);
- if (cfg != null) {
- context.setProperty(RendererContextConstants.HANDLER_CONFIGURATION, cfg);
- }
- }
- }
- }
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