com.github.wnameless.json.flattener.JsonifyLinkedHashMap.java Source code

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Here is the source code for com.github.wnameless.json.flattener.JsonifyLinkedHashMap.java

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/*
 *
 * Copyright 2016 Wei-Ming Wu
 *
 * 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 com.github.wnameless.json.flattener;

import java.io.IOException;
import java.io.StringWriter;
import java.util.LinkedHashMap;
import java.util.Map.Entry;

import org.apache.commons.lang3.text.translate.CharSequenceTranslator;

import com.eclipsesource.json.Json;
import com.eclipsesource.json.PrettyPrint;
import com.eclipsesource.json.WriterConfig;

/**
 * {@link JsonifyLinkedHashMap} is simple a LinkedHashMap but with an override
 * jsonify toString method.
 * 
 * @author Wei-Ming Wu
 *
 * @param <K>
 *          the type of keys
 * @param <V>
 *          the type of values
 */
public class JsonifyLinkedHashMap<K, V> extends LinkedHashMap<K, V> {

    private static final long serialVersionUID = 1L;

    private CharSequenceTranslator translator = StringEscapePolicy.NORMAL.getCharSequenceTranslator();

    public void setTranslator(CharSequenceTranslator translator) {
        this.translator = translator;
    }

    public String toString(PrintMode printMode) {
        StringWriter sw = new StringWriter();
        try {
            switch (printMode) {
            case REGULAR:
                Json.parse(toString()).writeTo(sw, PrettyPrint.singleLine());
                break;
            case PRETTY:
                Json.parse(toString()).writeTo(sw, WriterConfig.PRETTY_PRINT);
                break;
            default:
                return toString();
            }
        } catch (IOException e) {
        }

        return sw.toString();
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append('{');
        for (Entry<K, V> mem : entrySet()) {
            sb.append('"');
            sb.append(mem.getKey());
            sb.append('"');
            sb.append(':');
            if (mem.getValue() instanceof String) {
                sb.append('"');
                sb.append(translator.translate((String) mem.getValue()));
                sb.append('"');
            } else {
                sb.append(mem.getValue());
            }
            sb.append(',');
        }
        if (sb.length() > 1)
            sb.setLength(sb.length() - 1);
        sb.append('}');

        return sb.toString();
    }

}