org.apache.fop.pdf.PDFResourceContext 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: PDFResourceContext.java 1618887 2014-08-19 15:24:45Z ssteiner $ */
package org.apache.fop.pdf;
import java.util.LinkedHashSet;
import java.util.Set;
/**
* The PDF resource context.
*
* There is one of these for every page in a PDF document. The object
* specifies the dimensions of the page and references a /Resources
* object, a contents stream and the page's parent in the page
* hierarchy.
*
* Modified by Mark Lillywhite, [email protected]. The Parent
* object was being referred to by reference, but all that we
* ever used from the Parent was its PDF object ID, and according
* to the memory profile this was causing OOM issues. So, we store
* only the object ID of the parent, rather than the parent itself.
*/
public class PDFResourceContext extends PDFDictionary {
private Set xObjects = new LinkedHashSet();
private Set patterns = new LinkedHashSet();
private Set shadings = new LinkedHashSet();
private Set gstates = new LinkedHashSet();
/**
* Creates a new ResourceContext.
* @param resources the /Resources object
*/
public PDFResourceContext(PDFResources resources) {
/* generic creation of object */
super();
/* set fields using parameters */
put("Resources", resources);
resources.addContext(this);
}
public void addXObject(PDFXObject xObject) {
xObjects.add(xObject);
}
public Set getXObjects() {
return xObjects;
}
/**
* Get the resources for this resource context.
*
* @return the resources in this resource context
*/
public PDFResources getPDFResources() {
return (PDFResources)get("Resources");
}
/**
* set this page's annotation list
*
* @param annot a PDFAnnotList list of annotations
*/
public void addAnnotation(PDFObject annot) {
PDFAnnotList annotList = getAnnotations();
if (annotList == null) {
annotList = getDocument().getFactory().makeAnnotList();
put("Annots", annotList);
}
annotList.addAnnot(annot);
}
/**
* Get the current annotations.
*
* @return the current annotation list
*/
public PDFAnnotList getAnnotations() {
return (PDFAnnotList)get("Annots");
}
/**
* A a GState to this resource context.
*
* @param gstate the GState to add
*/
public void addGState(PDFGState gstate) {
gstates.add(gstate);
}
public Set getGStates() {
return gstates;
}
/**
* Add the shading to the current resource context.
*
* @param shading the shading to add
*/
public void addShading(PDFShading shading) {
shadings.add(shading);
}
public Set getShadings() {
return shadings;
}
public Set getPatterns() {
return patterns;
}
public void addPattern(PDFPattern pattern) {
patterns.add(pattern);
}
}