io.vertigo.shell.util.JSonBeautifier.java Source code

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Here is the source code for io.vertigo.shell.util.JSonBeautifier.java

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/**
 * vertigo - simple java starter
 *
 * Copyright (C) 2013-2017, KleeGroup, direction.technique@kleegroup.com (http://www.kleegroup.com)
 * KleeGroup, Centre d'affaire la Boursidiere - BP 159 - 92357 Le Plessis Robinson Cedex - France
 *
 * 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 io.vertigo.shell.util;

import java.util.Map.Entry;

import com.google.gson.JsonElement;

/**
 * @author pchretien
 */
public final class JSonBeautifier {

    public static String beautify(final JsonElement jsonElement) {
        final StringBuilder sb = new StringBuilder();
        beautify(sb, jsonElement, 0);
        return sb.toString();
    }

    private static void appendCRLF(final StringBuilder sb) {
        sb.append("\r\n");
    }

    private static void appendSpaces(final StringBuilder sb, final int offset) {
        for (int i = 0; i < offset; i++) {
            sb.append("    ");
        }
    }

    private static void beautify(final StringBuilder sb, final JsonElement jsonElement, final int inOffset) {
        int offset = inOffset;
        if (jsonElement.isJsonArray()) {
            offset++;
            for (final JsonElement jsonElement2 : jsonElement.getAsJsonArray()) {
                //sb.append("- ");
                beautify(sb, jsonElement2, offset);
            }
            offset--;
        } else if (jsonElement.isJsonObject()) {
            for (final Entry<String, JsonElement> entry : jsonElement.getAsJsonObject().entrySet()) {
                appendSpaces(sb, offset);
                sb.append(entry.getKey());
                sb.append(" : ");
                if (entry.getValue().isJsonPrimitive()) {
                    sb.append(entry.getValue());
                    appendCRLF(sb);
                } else {
                    offset++;
                    appendCRLF(sb);
                    beautify(sb, entry.getValue(), offset);
                    offset--;
                }
            }
        } else if (jsonElement.isJsonPrimitive()) {
            //               appendSpaces(sb, offset);
            final String s = jsonElement.toString();
            if (s.startsWith("\"") && s.endsWith("\"")) {
                sb.append(s.substring(1, s.length() - 1));
            } else {
                sb.append(s);
            }
            appendCRLF(sb);
        } else {
            sb.append("???");
            //null
        }
    }
}