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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.intermediate;
-
- import java.util.Locale;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.fop.accessibility.DummyStructureTreeEventHandler;
- import org.apache.fop.accessibility.StructureTreeEventHandler;
- import org.apache.fop.apps.FOUserAgent;
-
- /**
- * Abstract base class for {@link IFDocumentHandler} implementations.
- */
- public abstract class AbstractIFDocumentHandler implements IFDocumentHandler {
-
- private IFContext ifContext;
-
- /**
- * Default constructor.
- */
- public AbstractIFDocumentHandler() {
- }
-
- /** {@inheritDoc} */
- public void setContext(IFContext context) {
- this.ifContext = context;
- }
-
- /** {@inheritDoc} */
- public IFContext getContext() {
- return this.ifContext;
- }
-
- /**
- * Returns the associated user agent.
- * @return the user agent
- */
- public FOUserAgent getUserAgent() {
- return getContext().getUserAgent();
- }
-
- /** {@inheritDoc} */
- public StructureTreeEventHandler getStructureTreeEventHandler() {
- return DummyStructureTreeEventHandler.INSTANCE;
- }
-
- /** {@inheritDoc} */
- public IFDocumentNavigationHandler getDocumentNavigationHandler() {
- return null; //By default, this is not supported
- }
-
- /** {@inheritDoc} */
- public void startDocument() throws IFException {
- if (getUserAgent() == null) {
- throw new IllegalStateException(
- "User agent must be set before starting document generation");
- }
- }
-
- /** {@inheritDoc} */
- public void setDocumentLocale(Locale locale) {
- }
-
- /** {@inheritDoc} */
- public void startDocumentHeader() throws IFException {
- //nop
- }
-
- /** {@inheritDoc} */
- public void endDocumentHeader() throws IFException {
- //nop
- }
-
- /** {@inheritDoc} */
- public void startDocumentTrailer() throws IFException {
- //nop
- }
-
- /** {@inheritDoc} */
- public void endDocumentTrailer() throws IFException {
- //nop
- }
-
- /** {@inheritDoc} */
- public void startPageHeader() throws IFException {
- //nop
- }
-
- /** {@inheritDoc} */
- public void endPageHeader() throws IFException {
- //nop
- }
-
- /** {@inheritDoc} */
- public void startPageTrailer() throws IFException {
- //nop
- }
-
- /** {@inheritDoc} */
- public void endPageTrailer() throws IFException {
- //nop
- }
- }
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