org.apache.fop.render.AbstractRenderingContext Maven / Gradle / Ivy
/*
* 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: AbstractRenderingContext.java 746664 2009-02-22 12:40:44Z jeremias $ */
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);
}
}
}