de.intarsys.pdf.cos.COSConverter Maven / Gradle / Ivy
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/*
* Copyright (c) 2007, intarsys consulting GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of intarsys nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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package de.intarsys.pdf.cos;
import de.intarsys.tools.stream.StreamTools;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
/**
*
*/
public class COSConverter {
protected static Object basicToJava(COSObject object, Map visited) {
if (object instanceof COSArray) {
List result = new ArrayList();
for (COSObject anObject : object) {
result.add(toJava(anObject, visited));
}
return result;
} else if (object instanceof COSDictionary) {
Map result = new HashMap();
Iterator> it = ((COSDictionary) object).entryIterator();
while (it.hasNext()) {
Map.Entry entry = it.next();
result.put(entry.getKey().stringValue(), toJava(entry.getValue(), visited));
}
return result;
} else if (object instanceof COSObjectProxy) {
return toJava(((COSObjectProxy) object).cosGetObject());
} else if (object instanceof COSStream) {
return ((COSStream) object).getDecodedBytes();
} else if (object instanceof COSBoolean) {
return ((COSBoolean) object).booleanValue();
} else if (object instanceof COSName) {
return ((COSName) object).byteValue();
} else if (object instanceof COSNull) {
return null;
} else if (object instanceof COSFixed) {
return ((COSFixed) object).floatValue();
} else if (object instanceof COSInteger) {
return ((COSInteger) object).intValue();
} else if (object instanceof COSString) {
return object.stringValue();
} else {
// ... we did a complete enumeration...
throw new IllegalStateException("can not happen"); //$NON-NLS-1$
}
}
/**
* Try the best in marshalling java objects directly to {@link COSObject}.
* Collections will be marshalled recursively.
*
* todo this is not yet recursion safe
*
* @param javaObject the java object to be marshalled
* @return The resulting {@link COSObject}
*/
public static COSObject toCos(Object javaObject) {
COSObject result = null;
if (javaObject instanceof String) {
result = COSString.create((String) javaObject);
} else if (javaObject instanceof Integer) {
result = COSInteger.create(((Integer) javaObject).intValue());
} else if (javaObject instanceof Float) {
result = COSFixed.create(((Float) javaObject).floatValue());
} else if (javaObject instanceof Double) {
result = COSFixed.create(((Double) javaObject).floatValue());
} else if (javaObject instanceof Boolean) {
result = COSBoolean.create(((Boolean) javaObject).booleanValue());
} else if (javaObject == null) {
result = COSNull.create();
} else if (javaObject instanceof Map) {
result = COSDictionary.create(((Map) javaObject).size());
for (Iterator it = ((Map) javaObject).entrySet().iterator(); it.hasNext(); ) {
Map.Entry entry = (Map.Entry) it.next();
String key = String.valueOf(entry.getKey());
Object value = entry.getValue();
((COSDictionary) result).put(COSName.create(key), toCos(value));
}
} else if (javaObject instanceof List) {
result = COSArray.create(((List) javaObject).size());
for (Iterator it = ((List) javaObject).iterator(); it.hasNext(); ) {
Object value = it.next();
((COSArray) result).add(toCos(value));
}
} else if (javaObject instanceof byte[]) {
result = COSName.create((byte[]) javaObject);
} else if (javaObject instanceof char[]) {
result = COSString.create(new String((char[]) javaObject));
} else if (javaObject instanceof float[]) {
float[] floats = (float[]) javaObject;
result = COSArray.create(floats.length);
for (int i = 0; i < floats.length; i++) {
((COSArray) result).add(COSFixed.create(floats[i]));
}
} else if (javaObject instanceof double[]) {
double[] doubles = (double[]) javaObject;
result = COSArray.create(doubles.length);
for (int i = 0; i < doubles.length; i++) {
((COSArray) result).add(COSFixed.create(doubles[i]));
}
} else if (javaObject instanceof int[]) {
int[] ints = (int[]) javaObject;
result = COSArray.create(ints.length);
for (int i = 0; i < ints.length; i++) {
((COSArray) result).add(COSInteger.create(ints[i]));
}
} else if (javaObject instanceof Byte) {
result = COSInteger.create(((Byte) javaObject).intValue());
} else if (javaObject instanceof Short) {
result = COSInteger.create(((Short) javaObject).intValue());
} else if (javaObject instanceof Long) {
result = COSInteger.create(((Long) javaObject).intValue());
} else if (javaObject instanceof InputStream) {
result = COSStream.create(null);
byte[] bytes;
try {
bytes = StreamTools.toByteArray((InputStream) javaObject);
} catch (IOException ignored) {
bytes = new byte[]{};
}
((COSStream) result).setDecodedBytes(bytes);
} else if (javaObject instanceof COSObject) {
result = (COSObject) javaObject;
} else {
throw new IllegalArgumentException(javaObject + " can not be marshalled to a cos object"); //$NON-NLS-1$
}
return result;
}
public static Object toJava(COSObject object) {
return toJava(object, new HashMap());
}
public static Object toJava(COSObject object, Map visited) {
Object result = visited.get(object);
if (result != null) {
return result;
}
result = basicToJava(object, visited);
visited.put(object, result);
return result;
}
private COSConverter() {
super();
}
}