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playn.core.json.JsonBuilder Maven / Gradle / Ivy
/**
* Copyright 2011 The PlayN Authors
*
* Licensed 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 playn.core.json;
import java.util.Collection;
import java.util.Map;
import java.util.Stack;
import playn.core.Json;
/**
* Builds a {@link JsonObject} or {@link JsonArray}.
*
* @param
* The type of JSON object to build.
*/
final class JsonBuilder implements JsonSink> {
private Stack json = new Stack();
private T root;
JsonBuilder(T root) {
this.root = root;
json.push(root);
}
/**
* Completes this builder, closing any unclosed objects and returns the built object.
*/
public T done() {
return root;
}
@Override
public JsonBuilder array(Collection c) {
return value(c);
}
@Override
public JsonBuilder array(Json.Array c) {
return value(c);
}
@Override
public JsonBuilder array(String key, Collection c) {
return value(key, c);
}
@Override
public JsonBuilder array(String key, Json.Array c) {
return value(key, c);
}
@Override
public JsonBuilder object(Map map) {
return value(map);
}
@Override
public JsonBuilder object(Json.Object object) {
return value(object);
}
@Override
public JsonBuilder object(String key, Map map) {
return value(key, map);
}
@Override
public JsonBuilder object(String key, Json.Object object) {
return value(key, object);
}
@Override
public JsonBuilder nul() {
return value((Object)null);
}
@Override
public JsonBuilder nul(String key) {
return value(key, (Object)null);
}
@Override
public JsonBuilder value(Object o) {
arr().add(o);
return this;
}
@Override
public JsonBuilder value(String key, Object o) {
obj().put(key, o);
return this;
}
@Override
public JsonBuilder value(String s) {
return value((Object)s);
}
@Override
public JsonBuilder value(int i) {
return value((Object)i);
}
@Override
public JsonBuilder value(boolean b) {
return value((Object)b);
}
@Override
public JsonBuilder value(double d) {
return value((Object)d);
}
@Override
public JsonBuilder value(float f) {
return value((Object)f);
}
@Override
public JsonBuilder value(Number n) {
return value((Object)n);
}
@Override
public JsonBuilder value(String key, String s) {
return value(key, (Object)s);
}
@Override
public JsonBuilder value(String key, int i) {
return value(key, (Object)i);
}
@Override
public JsonBuilder value(String key, boolean b) {
return value(key, (Object)b);
}
@Override
public JsonBuilder value(String key, double d) {
return value(key, (Object)d);
}
@Override
public JsonBuilder value(String key, float f) {
return value(key, (Object)f);
}
@Override
public JsonBuilder value(String key, Number n) {
return value(key, (Object)n);
}
@Override
public JsonBuilder array() {
JsonArray a = new JsonArray();
value(a);
json.push(a);
return this;
}
@Override
public JsonBuilder object() {
JsonObject o = new JsonObject();
value(o);
json.push(o);
return this;
}
@Override
public JsonBuilder array(String key) {
JsonArray a = new JsonArray();
value(key, a);
json.push(a);
return this;
}
@Override
public JsonBuilder object(String key) {
JsonObject o = new JsonObject();
value(key, o);
json.push(o);
return this;
}
@Override
public JsonBuilder end() {
if (json.size() == 1)
throw new JsonWriterException("Cannot end the root object or array");
json.pop();
return this;
}
private JsonObject obj() {
try {
return (JsonObject)json.peek();
} catch (ClassCastException e) {
throw new JsonWriterException("Attempted to write a keyed value to a JsonArray");
}
}
private JsonArray arr() {
try {
return (JsonArray)json.peek();
} catch (ClassCastException e) {
throw new JsonWriterException("Attempted to write a non-keyed value to a JsonObject");
}
}
}
