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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.pdf;
-
- import java.io.IOException;
- import java.io.OutputStream;
- import java.util.Collection;
- import java.util.HashMap;
- import java.util.List;
- import java.util.Map;
- import java.util.Set;
-
- import org.apache.commons.io.output.CountingOutputStream;
-
- /**
- * Class representing a PDF dictionary object
- */
- public class PDFDictionary extends PDFObject {
- private boolean visited;
- /**
- * the entry map
- */
- protected Map<String, Object> entries = new java.util.HashMap<String, Object>();
-
- /**
- * maintains the order of the entries added to the entry map. Whenever you modify
- * "entries", always make sure you adjust this list accordingly.
- */
- protected List<String> order = new java.util.ArrayList<String>();
-
- /**
- * Create a new dictionary object.
- */
- public PDFDictionary() {
- super();
- }
-
- /**
- * Create a new dictionary object.
- * @param parent the object's parent if any
- */
- public PDFDictionary(PDFObject parent) {
- super(parent);
- }
-
- /**
- * Puts a new name/value pair.
- * @param name the name
- * @param value the value
- */
- public void put(String name, Object value) {
- if (value instanceof PDFObject) {
- PDFObject pdfObj = (PDFObject)value;
- if (!pdfObj.hasObjectNumber()) {
- pdfObj.setParent(this);
- }
- }
- if (!entries.containsKey(name)) {
- this.order.add(name);
- }
- this.entries.put(name, value);
- }
-
- /**
- * Puts a new name/value pair.
- * @param name the name
- * @param value the value
- */
- public void put(String name, int value) {
- if (!entries.containsKey(name)) {
- this.order.add(name);
- }
- this.entries.put(name, value);
- }
-
- /**
- * Returns the value given a name.
- * @param name the name of the value
- * @return the value or null, if there's no value with the given name.
- */
- public Object get(String name) {
- return this.entries.get(name);
- }
-
- /** {@inheritDoc} */
- @Override
- public int output(OutputStream stream) throws IOException {
- CountingOutputStream cout = new CountingOutputStream(stream);
- StringBuilder textBuffer = new StringBuilder(64);
- writeDictionary(cout, textBuffer);
- PDFDocument.flushTextBuffer(textBuffer, cout);
- return cout.getCount();
- }
-
- /**
- * Writes the contents of the dictionary to a StringBuffer.
- * @param out the OutputStream (for binary content)
- * @param textBuffer the text buffer for text output
- * @throws IOException if an I/O error occurs
- */
- protected void writeDictionary(OutputStream out, StringBuilder textBuffer) throws IOException {
- textBuffer.append("<<");
- boolean compact = (this.order.size() <= 2);
- for (String key : this.order) {
- if (compact) {
- textBuffer.append(' ');
- } else {
- textBuffer.append("\n ");
- }
- textBuffer.append(PDFName.escapeName(key));
- textBuffer.append(' ');
- Object obj = this.entries.get(key);
- formatObject(obj, out, textBuffer);
- }
- if (compact) {
- textBuffer.append(' ');
- } else {
- textBuffer.append('\n');
- }
- textBuffer.append(">>");
- }
-
- @Override
- public void getChildren(Set<PDFObject> children) {
- if (!visited) {
- visited = true;
- Map<String, Object> childrenMap = new HashMap<String, Object>(entries);
- childrenMap.remove("Parent");
- getChildren(childrenMap.values(), children);
- visited = false;
- }
- }
-
- public static void getChildren(Collection<Object> values, Set<PDFObject> children) {
- for (Object x : values) {
- if (x instanceof PDFReference) {
- x = ((PDFReference) x).getObject();
- }
- if (x instanceof PDFObject) {
- if (((PDFObject) x).hasObjectNumber()) {
- children.add((PDFObject) x);
- }
- ((PDFObject) x).getChildren(children);
- }
- }
- }
-
- public Set<String> keySet() {
- return entries.keySet();
- }
-
- /**
- * @see java.util.Map#containsKey(Object)
- *
- * @param name The key to find in the map.
- * @return true if the map contains this key.
- */
- public boolean containsKey(String name) {
- return this.entries.containsKey(name);
- }
-
- /**
- * Removes the mapping for the specified key
- * @param name key whose mapping is to be removed
- */
- public void remove(String name) {
- entries.remove(name);
- }
- }
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