com.sap.psr.vulas.java.sign.gson.ASTConstructBodySignatureSerializer Maven / Gradle / Ivy

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/**
 * This file is part of Eclipse Steady.
 *
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved.
 */
package com.sap.psr.vulas.java.sign.gson;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import com.sap.psr.vulas.java.sign.ASTConstructBodySignature;
import com.sap.psr.vulas.shared.json.JsonBuilder;

import ch.uzh.ifi.seal.changedistiller.treedifferencing.Node;

/**
 * ASTConstructBodySignatureSerializer class.
 *
 */
public class ASTConstructBodySignatureSerializer extends StdSerializer {

	/**
	 * Constructor for ASTConstructBodySignatureSerializer.
	 */
	public ASTConstructBodySignatureSerializer() {
		this(null);
	}

	/**
	 * Constructor for ASTConstructBodySignatureSerializer.
	 *
	 * @param t a {@link java.lang.Class} object.
	 */
	public ASTConstructBodySignatureSerializer(Class t) {
		super(t);
	}

	/**
	 * @param n - The Root Node
	 * @return - JSON representation of the AST
	 *  NB : An ast as an array of Nodes
	 *   A Node {"name" : "Value of Node", "parent" : "value of parent Node", "children" : [{"name" : "value of node", "parent" : "value of parent Node"},......,{}]}
	 */
	private void writeComplexNode(JsonGenerator jgen, Node n) throws IOException {
		if(n.isLeaf()){
			jgen.writeStartObject();
			this.writeNodeProperties(jgen, n);
			jgen.writeEndObject();
		}
		else{
			for(int i=0; i < n.getChildCount(); i++) {
				final Node node = (Node)n.getChildAt(i);
				jgen.writeStartObject();
				this.writeNodeProperties(jgen, node);
				if(!node.isLeaf()) {
					jgen.writeArrayFieldStart("C");
					this.writeComplexNode(jgen, node);
					jgen.writeEndArray();
				}
				jgen.writeEndObject();
			}
		}
	}

	/**
	 * Writes various properties of the given {@link Node}.
	 * @param n the node whose properties are written
	 */
	private void writeNodeProperties(JsonGenerator jgen, Node n) throws IOException {
		jgen.writeStringField("Value", n.getValue().toString());
		// The unique name has the same information as Node.Value
		//buffer.append("\"UniqueName\" : " ).append(JsonBuilder.escape(n.getEntity().getUniqueName().toString())).append(","); ;

		jgen.writeObjectFieldStart("SourceCodeEntity");
		jgen.writeStringField("Modifiers", new Integer(n.getEntity().getModifiers()).toString());

		jgen.writeObjectFieldStart("SourceRange");
		jgen.writeStringField("Start", new Integer(n.getEntity().getSourceRange().getStart()).toString());
		jgen.writeStringField("End", new Integer(n.getEntity().getSourceRange().getEnd()).toString());
		jgen.writeEndObject(); // SourceRange

		jgen.writeEndObject(); // SourceCodeEntity
		jgen.writeStringField("EntityType", n.getEntity().getType().toString());
	}

	/** {@inheritDoc} */
	@Override
	public void serialize(ASTConstructBodySignature value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonProcessingException {
		jgen.writeStartObject();
		jgen.writeArrayFieldStart("ast");
		final Node n = value.getRoot();
		if(n.isRoot()){
			jgen.writeStartObject();
			this.writeNodeProperties(jgen, n);
			if(!n.isLeaf()) {
				jgen.writeArrayFieldStart("C");
				this.writeComplexNode(jgen, n);
				jgen.writeEndArray();
			}
			jgen.writeEndObject();
		}
		jgen.writeEndArray();
		jgen.writeEndObject();
	}
}