com.hazelcast.org.jsfr.json.JsonPosition Maven / Gradle / Ivy
/*
* MIT License
*
* Copyright (c) 2019 WANG Lingsong
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.hazelcast.org.jsfr.json;
import com.hazelcast.org.jsfr.json.path.ArrayIndex;
import com.hazelcast.org.jsfr.json.path.ChildNode;
import com.hazelcast.org.jsfr.json.path.JsonPath;
import com.hazelcast.org.jsfr.json.path.PathOperator;
class JsonPosition extends JsonPath {
static JsonPosition start() {
return new JsonPosition();
}
void stepIntoObject() {
if (operators.length > size) {
PathOperator next = operators[size];
if (next instanceof ChildNode) {
size++;
((ChildNode) next).setKey(null);
return;
}
}
push(new ChildNode(null));
}
void updateObjectEntry(String key) {
((ChildNode) peek()).setKey(key);
}
void stepOutObject() {
pop();
}
void stepIntoArray() {
PathOperator last = peek();
pushArray(last);
}
void stepOutArray() {
popArray(peek());
}
private void popArray(PathOperator node) {
if (node instanceof ArrayIndex) {
pop();
ArrayIndex indexNode = (ArrayIndex) node;
if (indexNode.getKey() != null) {
push(new ChildNode(indexNode.getKey()));
}
}
}
private void pushArray(PathOperator node) {
if (node instanceof ChildNode && node.getType() == PathOperator.Type.OBJECT) {
pop();
push(new ArrayIndex(((ChildNode) node).getKey()));
} else {
if (operators.length > size) {
PathOperator next = operators[size];
if (next instanceof ArrayIndex) {
size++;
((ArrayIndex) next).reset();
return;
}
}
push(new ArrayIndex(null));
}
}
}
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