johnzon-jsonb/src/main/java/org/apache/johnzon/jsonb/generator/GeneratedJohnzonJsonb.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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 org.apache.johnzon.jsonb.generator;

import org.apache.johnzon.jsonb.JohnzonJsonb;

import javax.json.JsonNumber;
import javax.json.JsonString;
import javax.json.JsonValue;
import java.io.Reader;
import java.io.Writer;

public abstract class GeneratedJohnzonJsonb {
    protected final JohnzonJsonb root;

    protected GeneratedJohnzonJsonb(final JohnzonJsonb root) {
        this.root = root;
    }

    public abstract <T> T fromJson(Reader reader);

    public abstract void toJson(Object object, Writer writer);

    protected static String json2String(final JsonValue value) {
        switch (value.getValueType()) {
            case STRING:
                return JsonString.class.cast(value).getString();
            case NULL:
                return null;
            default:
                throw new IllegalArgumentException("expected a string, got " + value.getValueType());
        }
    }

    protected static int json2Int(final JsonValue value) {
        switch (value.getValueType()) {
            case NUMBER:
                return JsonNumber.class.cast(value).intValue();
            default:
                throw new IllegalArgumentException("expected an int, got " + value.getValueType());
        }
    }
}