Java Json Convert toString(JsonValue json)

Description

Converts a JSON value to an indented text representation.

License

Apache License

Parameter

Parameter	Description
json	a JSON value to be converted.

Return

an indented text.

Declaration

public static String toString(JsonValue json) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2015, 2016 Junichi Tatemura
 *
 * 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.//from  w w w  .ja  v a  2  s.  c  om
 *******************************************************************************/

import java.util.Map;

import javax.json.JsonArray;

import javax.json.JsonObject;

import javax.json.JsonValue;
import javax.json.JsonValue.ValueType;

public class Main {
    private static final String INDENT = "  ";

    /**
     * Converts a JSON value to an indented text representation.
     * 
     * @param json a JSON value to be converted.
     * @return an indented text.
     */
    public static String toString(JsonValue json) {
        StringBuilder sb = new StringBuilder();
        toString(json, sb, 0);
        return sb.toString();
    }

    private static void toString(JsonObject json, StringBuilder sb, int indent) {
        sb.append("{");
        boolean contd = false;
        for (Map.Entry<String, JsonValue> e : json.entrySet()) {
            if (contd) {
                sb.append(",\n");
            } else {
                contd = true;
                sb.append("\n");
            }
            indent(indent + 1, sb);
            sb.append("\"").append(e.getKey()).append("\": ");
            toString(e.getValue(), sb, indent + 1);
        }
        if (contd) {
            sb.append("\n");
            indent(indent, sb);
        }
        sb.append("}");
    }

    private static void toString(JsonArray json, StringBuilder sb, int indent) {
        sb.append("[");
        boolean contd = false;
        for (JsonValue v : json) {
            if (contd) {
                sb.append(",\n");
            } else {
                contd = true;
                sb.append("\n");
            }
            indent(indent + 1, sb);
            toString(v, sb, indent + 1);
        }
        sb.append("]");
    }

    private static void toString(JsonValue json, StringBuilder sb, int indent) {
        if (json.getValueType() == ValueType.OBJECT) {
            toString((JsonObject) json, sb, indent);
        } else if (json.getValueType() == ValueType.ARRAY) {
            toString((JsonArray) json, sb, indent);
        } else {
            sb.append(json.toString());
        }
    }

    private static void indent(int indent, StringBuilder sb) {
        for (int i = 0; i < indent; i++) {
            sb.append(INDENT);
        }
    }
}

Related

1. jsonArrayToBooleanList(final JsonArray arr)
2. jsonArrayToString(final JsonArray array)
3. toIntArray(JsonArray jsonArray)
4. toJsonString(JsonObject json)
5. toList(JsonArray array)
6. toStringArray(JsonArray jsa)