| /* |
| * 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 java.util.Collections; |
| import java.util.Map; |
| |
| import org.apache.fop.apps.FOUserAgent; |
| |
| /** |
| * Abstract base class for RenderingContext implementations. |
| */ |
| public abstract class AbstractRenderingContext implements RenderingContext { |
| |
| private FOUserAgent userAgent; |
| private Map hints; |
| |
| /** |
| * Main constructor. |
| * @param userAgent the user agent |
| */ |
| public AbstractRenderingContext(FOUserAgent userAgent) { |
| this.userAgent = userAgent; |
| } |
| |
| /** |
| * Returns the user agent. |
| * |
| * @return The user agent |
| */ |
| public FOUserAgent getUserAgent() { |
| return userAgent; |
| } |
| |
| /** {@inheritDoc} */ |
| public void putHints(Map additionalHints) { |
| if (additionalHints == null) { |
| return; |
| } |
| if (this.hints == null) { |
| this.hints = new java.util.HashMap(); |
| } |
| this.hints.putAll(additionalHints); |
| } |
| |
| /** {@inheritDoc} */ |
| public void putHint(Object key, Object value) { |
| this.hints.put(key, value); |
| } |
| |
| /** {@inheritDoc} */ |
| public Map getHints() { |
| if (this.hints == null) { |
| return Collections.EMPTY_MAP; |
| } else { |
| return Collections.unmodifiableMap(this.hints); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| public Object getHint(Object key) { |
| if (this.hints == null) { |
| return null; |
| } else { |
| return this.hints.get(key); |
| } |
| } |
| } |
| |