/*
* 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.
*/
package org.apache.sling.jcr.contentloader.internal;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashSet;
import java.util.Set;
import javax.jcr.PropertyType;
import org.apache.sling.commons.json.JSONArray;
import org.apache.sling.commons.json.JSONException;
import org.apache.sling.commons.json.JSONObject;
/**
* The <code>JsonReader</code> TODO
*/
class JsonReader implements NodeReader {
private static final Set<String> ignoredNames = new HashSet<String>();
static {
ignoredNames.add("jcr:primaryType");
ignoredNames.add("jcr:mixinTypes");
ignoredNames.add("jcr:uuid");
ignoredNames.add("jcr:baseVersion");
ignoredNames.add("jcr:predecessors");
ignoredNames.add("jcr:successors");
ignoredNames.add("jcr:checkedOut");
ignoredNames.add("jcr:created");
}
static final ImportProvider PROVIDER = new ImportProvider() {
private JsonReader jsonReader;
public NodeReader getReader() {
if (jsonReader == null) {
jsonReader = new JsonReader();
}
return jsonReader;
}
};
public NodeDescription parse(InputStream ins) throws IOException {
try {
String jsonString = toString(ins).trim();
if (!jsonString.startsWith("{")) {
jsonString = "{" + jsonString + "}";
}
JSONObject json = new JSONObject(jsonString);
return this.createNode(null, json);
} catch (JSONException je) {
throw (IOException) new IOException(je.getMessage()).initCause(je);
}
}
protected NodeDescription createNode(String name, JSONObject obj) throws JSONException {
NodeDescription node = new NodeDescription();
node.setName(name);
Object primaryType = obj.opt("jcr:primaryType");
if (primaryType != null) {
node.setPrimaryNodeType(String.valueOf(primaryType));
}
Object mixinsObject = obj.opt("jcr:mixinTypes");
if (mixinsObject instanceof JSONArray) {
JSONArray mixins = (JSONArray) mixinsObject;
for (int i = 0; i < mixins.length(); i++) {
node.addMixinNodeType(mixins.getString(i));
}
}
// add properties and nodes
JSONArray names = obj.names();
for (int i = 0; names != null && i < names.length(); i++) {
String n = names.getString(i);
// skip well known objects
if (!ignoredNames.contains(n)) {
Object o = obj.get(n);
if (o instanceof JSONObject) {
NodeDescription child = this.createNode(n, (JSONObject) o);
node.addChild(child);
} else if (o instanceof JSONArray) {
PropertyDescription prop = createProperty(n, o);
node.addProperty(prop);
} else {
PropertyDescription prop = createProperty(n, o);
node.addProperty(prop);
}
}
}
return node;
}
protected PropertyDescription createProperty(String name, Object value)
throws JSONException {
PropertyDescription property = new PropertyDescription();
property.setName(name);
// assume simple value
if (value instanceof JSONArray) {
// multivalue
JSONArray array = (JSONArray) value;
if (array.length() > 0) {
for (int i = 0; i < array.length(); i++) {
property.addValue(array.get(i));
}
value = array.opt(0);
} else {
property.addValue(null);
value = null;
}
} else {
// single value
property.setValue(String.valueOf(value));
}
// set type
property.setType(getType(value));
return property;
}
protected String getType(Object object) {
if (object instanceof Double || object instanceof Float) {
return PropertyType.TYPENAME_DOUBLE;
} else if (object instanceof Number) {
return PropertyType.TYPENAME_LONG;
} else if (object instanceof Boolean) {
return PropertyType.TYPENAME_BOOLEAN;
}
// fall back to default
return PropertyType.TYPENAME_STRING;
}
private String toString(InputStream ins) throws IOException {
if (!ins.markSupported()) {
ins = new BufferedInputStream(ins);
}
String encoding;
ins.mark(5);
int c = ins.read();
if (c == '#') {
// character encoding following
StringBuffer buf = new StringBuffer();
for (c = ins.read(); !Character.isWhitespace((char) c); c = ins.read()) {
buf.append((char) c);
}
encoding = buf.toString();
} else {
ins.reset();
encoding = "UTF-8";
}
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
int rd;
while ( (rd = ins.read(buf)) >= 0) {
bos.write(buf, 0, rd);
}
bos.close(); // just to comply with the contract
return new String(bos.toByteArray(), encoding);
}
}