org.bimserver.emf.SharedJsonSerializer Maven / Gradle / Ivy
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Base project for BIMserver plugin development. Some plugins mights also need the Shared library
package org.bimserver.emf;
/******************************************************************************
* Copyright (C) 2009-2016 BIMserver.org
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see {@literal iterator;
private IfcModelInterface model;
private OutputStream outputStream;
private boolean includeHidden;
public SharedJsonSerializer(IfcModelInterface model, boolean includeHidden) {
this.model = model;
this.includeHidden = includeHidden;
}
private void print(String line) throws IOException {
byte[] bytes = line.getBytes(Charsets.UTF_8);
outputStream.write(bytes, 0, bytes.length);
}
public boolean write(OutputStream outputStream, ProgressReporter progressReporter) throws SerializerException {
this.outputStream = outputStream;
try {
if (mode == Mode.HEADER) {
print("{");
IfcHeader ifcHeader = model.getModelMetaData().getIfcHeader();
if (ifcHeader != null) {
print("\"header\":");
writeObject(ifcHeader);
print("\n,");
}
print("\"objects\":[");
mode = Mode.BODY;
iterator = model.iterator();
return true;
} else if (mode == Mode.BODY) {
if (iterator.hasNext()) {
IdEObject object = iterator.next();
if (object.getOid() == -1) {
throw new SerializerException("Object cannot have oid -1 " + object.eClass().getName());
}
if (object.eClass().getEAnnotation("hidden") == null || includeHidden) {
if (!firstObject) {
print(",");
} else {
firstObject = false;
}
writeObject(object);
}
return true;
} else {
print("]");
print("}");
mode = Mode.FOOTER;
return true;
}
} else if (mode == Mode.FOOTER) {
mode = Mode.DONE;
return false;
}
} catch (Throwable e) {
throw new SerializerException(e);
}
return false;
}
private void writeObject(IdEObject object) throws IOException {
if (((IdEObjectImpl) object).getLoadingState() != State.LOADED) {
print("{");
print("\"_i\":" + object.getOid() + ",");
print("\"_t\":\"" + object.eClass().getName() + "\",");
print("\"_s\":0");
print("}\n");
} else {
print("{");
print("\"_i\":" + object.getOid() + ",");
print("\"_t\":\"" + object.eClass().getName() + "\",");
print("\"_s\":1");
for (EStructuralFeature eStructuralFeature : object.eClass().getEAllStructuralFeatures()) {
if (eStructuralFeature.getEAnnotation("nolazyload") == null && (eStructuralFeature.getEAnnotation("hidden") == null | includeHidden)) {
if (eStructuralFeature instanceof EReference) {
Object value = object.eGet(eStructuralFeature);
if (value != null) {
if (eStructuralFeature.isMany()) {
List list = (List) value;
if (SERIALIZE_EMPTY_LISTS || !list.isEmpty()) {
print(",");
int wrapped = 0;
int referred = 0;
for (Object o : list) {
if (((IdEObject) o).eClass().getEAnnotation("wrapped") != null) {
// A little tricky,
// can we assume if
// one object in
// this list is
// embedded, they
// all are?
wrapped++;
} else {
referred++;
}
}
if (wrapped == 0 && referred != 0) {
print("\"_r" + eStructuralFeature.getName() + "\":[");
} else if (wrapped != 0 && referred == 0) {
print("\"_e" + eStructuralFeature.getName() + "\":[");
} else if (wrapped == 0 && referred == 0) {
// should not happen
} else {
// both, this can occur,
// for example
// IfcTrimmedCurve.Trim1
print("\"_e" + eStructuralFeature.getName() + "\":[");
}
boolean f = true;
for (Object o : list) {
if (!f) {
print(",");
} else {
f = false;
}
IdEObject ref = (IdEObject) o;
EClass eClass = ((IdEObject) o).eClass();
if (ref.getOid() < 0 || eClass.getEAnnotation("wrapped") != null || eStructuralFeature.getEAnnotation("dbembed") != null) {
write(ref);
} else {
if (wrapped != 0 && referred != 0) {
// Special
// situation,
// where we have
// to construct
// an object
// around the
// OID to make
// it
// distinguishable
// from embedded
// objects
print("{");
print("\"_i\":");
print("" + ref.getOid());
print("}");
} else {
print("" + ref.getOid());
}
}
}
print("]");
}
} else {
print(",");
IdEObject ref = (IdEObject) value;
if (ref instanceof IfcGloballyUniqueId) {
print("\"" + eStructuralFeature.getName() + "\":");
writePrimitive(eStructuralFeature, ((IfcGloballyUniqueId) ref).getWrappedValue());
} else if (((IdEObject) ref).eClass().getEAnnotation("wrapped") != null) {
print("\"_e" + eStructuralFeature.getName() + "\":");
write(ref);
} else if (eStructuralFeature.getEAnnotation("dbembed") != null) {
print("\"_e" + eStructuralFeature.getName() + "\":");
writeEmbedded(ref);
} else {
print("\"_r" + eStructuralFeature.getName() + "\":" + ref.getOid());
}
}
}
} else {
Object value = object.eGet(eStructuralFeature);
if (value != null) {
if (eStructuralFeature.isMany()) {
List list = (List) value;
if (SERIALIZE_EMPTY_LISTS || !list.isEmpty()) {
print(",");
print("\"" + eStructuralFeature.getName() + "\":[");
boolean f = true;
for (Object o : list) {
if (!f) {
print(",");
} else {
f = false;
}
writePrimitive(eStructuralFeature, o);
}
print("]");
}
} else {
print(",");
print("\"" + eStructuralFeature.getName() + "\":");
writePrimitive(eStructuralFeature, value);
}
}
}
}
}
print("}\n");
}
}
private void writeEmbedded(IdEObject object) throws IOException {
print("{");
print("\"_t\":\"" + object.eClass().getName() + "\",");
for (EStructuralFeature eStructuralFeature : object.eClass().getEAllStructuralFeatures()) {
print("\"" + eStructuralFeature.getName() + "\":");
writePrimitive(eStructuralFeature, object.eGet(eStructuralFeature));
if (object.eClass().getEAllStructuralFeatures().get(object.eClass().getEAllStructuralFeatures().size()-1) != eStructuralFeature) {
print(",");
}
}
print("}");
}
private void write(IdEObject object) throws IOException {
if (object.eClass().getEAnnotation("wrapped") != null) {
EStructuralFeature wrappedFeature = object.eClass().getEStructuralFeature("wrappedValue");
print("{");
print("\"_t\":\"" + object.eClass().getName() + "\",");
print("\"_v\":");
writePrimitive(wrappedFeature, object.eGet(wrappedFeature));
print("}");
} else {
print("" + object.getOid());
}
}
// Following two methods copied from http://www.json.org/java/org/json/JSONObject.java
public static String quote(String string) {
StringWriter sw = new StringWriter();
synchronized (sw.getBuffer()) {
try {
return quote(string, sw).toString();
} catch (IOException ignored) {
// will never happen - we are writing to a string writer
return "";
}
}
}
public static Writer quote(String string, Writer w) throws IOException {
if (string == null || string.length() == 0) {
w.write("\"\"");
return w;
}
char b;
char c = 0;
String hhhh;
int i;
int len = string.length();
w.write('"');
for (i = 0; i < len; i += 1) {
b = c;
c = string.charAt(i);
switch (c) {
case '\\':
case '"':
w.write('\\');
w.write(c);
break;
case '/':
if (b == '<') {
w.write('\\');
}
w.write(c);
break;
case '\b':
w.write("\\b");
break;
case '\t':
w.write("\\t");
break;
case '\n':
w.write("\\n");
break;
case '\f':
w.write("\\f");
break;
case '\r':
w.write("\\r");
break;
default:
if (c < ' ' || (c >= '\u0080' && c < '\u00a0')
|| (c >= '\u2000' && c < '\u2100')) {
w.write("\\u");
hhhh = Integer.toHexString(c);
w.write("0000", 0, 4 - hhhh.length());
w.write(hhhh);
} else {
w.write(c);
}
}
}
w.write('"');
return w;
}
private void writePrimitive(EStructuralFeature feature, Object value) throws IOException {
if (value instanceof String) {
print(quote((String) value));
} else if (value instanceof byte[]) {
print("\"" + new String(Base64.encodeBase64((byte[]) value), Charsets.UTF_8) + "\"");
} else if (value instanceof Date) {
print(Long.toString(((Date)value).getTime()));
} else if (value instanceof Enum) {
if (value.toString().equalsIgnoreCase("true") || value.toString().equalsIgnoreCase("false")) {
print(value.toString().toLowerCase());
} else {
print("\"" + value + "\"");
}
} else {
print("" + value);
}
}
@Override
public boolean write(OutputStream out) {
try {
return write(out, null);
} catch (SerializerException e) {
LOGGER.error("", e);
}
return false;
}
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