/*
* 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.xmlgraphics.ps.dsc.events;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.apache.xmlgraphics.ps.PSGenerator;
import org.apache.xmlgraphics.ps.PSProcSet;
import org.apache.xmlgraphics.ps.PSResource;
/**
* Abstract base class for Resource DSC comments (DocumentNeededResources,
* DocumentSuppliedResources and PageResources).
*/
public abstract class AbstractResourcesDSCComment extends AbstractDSCComment {
private Set resources;
/**
* Creates a new instance.
*/
public AbstractResourcesDSCComment() {
super();
}
/**
* Creates a new instance.
* @param resources a Collection of PSResource instances
*/
public AbstractResourcesDSCComment(Collection resources) {
addResources(resources);
}
/**
* @see org.apache.xmlgraphics.ps.dsc.events.DSCComment#hasValues()
*/
public boolean hasValues() {
return true;
}
/**
* Adds a new resource.
* @param res the resource
*/
public void addResource(PSResource res) {
if (this.resources == null) {
this.resources = new java.util.HashSet();
}
this.resources.add(res);
}
/**
* Adds a collection of resources.
* @param resources a Collection of PSResource instances.
*/
public void addResources(Collection resources) {
if (resources != null) {
if (this.resources == null) {
this.resources = new java.util.HashSet();
}
this.resources.addAll(resources);
}
}
/**
* Returns the set of resources associated with this DSC comment.
* @return the set of resources
*/
public Set getResources() {
return Collections.unmodifiableSet(this.resources);
}
/**
* Defines the known resource types (font, procset, file, pattern etc.).
*/
protected static final Set RESOURCE_TYPES = new java.util.HashSet();
static {
RESOURCE_TYPES.add(PSResource.TYPE_FONT);
RESOURCE_TYPES.add(PSResource.TYPE_PROCSET);
RESOURCE_TYPES.add(PSResource.TYPE_FILE);
RESOURCE_TYPES.add(PSResource.TYPE_PATTERN);
RESOURCE_TYPES.add(PSResource.TYPE_FORM);
RESOURCE_TYPES.add(PSResource.TYPE_ENCODING);
}
/**
* @see org.apache.xmlgraphics.ps.dsc.events.DSCComment#parseValue(java.lang.String)
*/
public void parseValue(String value) {
List params = splitParams(value);
String currentResourceType = null;
Iterator iter = params.iterator();
while (iter.hasNext()) {
String name = (String)iter.next();
if (RESOURCE_TYPES.contains(name)) {
currentResourceType = name;
}
if (currentResourceType == null) {
throw new IllegalArgumentException(
"<resources> must begin with a resource type. Found: " + name);
}
if (PSResource.TYPE_FONT.equals(currentResourceType)) {
String fontname = (String)iter.next();
addResource(new PSResource(name, fontname));
} else if (PSResource.TYPE_FORM.equals(currentResourceType)) {
String formname = (String)iter.next();
addResource(new PSResource(name, formname));
} else if (PSResource.TYPE_PROCSET.equals(currentResourceType)) {
String procname = (String)iter.next();
String version = (String)iter.next();
String revision = (String)iter.next();
addResource(new PSProcSet(procname,
Float.parseFloat(version), Integer.parseInt(revision)));
} else if (PSResource.TYPE_FILE.equals(currentResourceType)) {
String filename = (String)iter.next();
addResource(new PSResource(name, filename));
} else {
throw new IllegalArgumentException("Invalid resource type: " + currentResourceType);
}
}
}
/**
* @see org.apache.xmlgraphics.ps.dsc.events.DSCEvent#generate(
* org.apache.xmlgraphics.ps.PSGenerator)
*/
public void generate(PSGenerator gen) throws IOException {
if (resources == null || resources.size() == 0) {
return;
}
StringBuffer sb = new StringBuffer();
sb.append("%%").append(getName()).append(": ");
boolean first = true;
Iterator i = resources.iterator();
while (i.hasNext()) {
if (!first) {
gen.writeln(sb.toString());
sb.setLength(0);
sb.append("%%+ ");
}
PSResource res = (PSResource)i.next();
sb.append(res.getResourceSpecification());
first = false;
}
gen.writeln(sb.toString());
}
}