iciql/src/main/java/com/iciql/adapter/SnakeYamlTypeAdapter.java

/*
 * Copyright 2014 James Moger.
 *
 * 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.iciql.adapter;

import com.iciql.Iciql.DataTypeAdapter;
import com.iciql.Iciql.Mode;
import org.yaml.snakeyaml.DumperOptions.FlowStyle;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.nodes.Tag;

/**
 * Base class for inserting/retrieving a Java Object (de)serialized as YAML using SnakeYaml.
 */
public abstract class SnakeYamlTypeAdapter<T> implements DataTypeAdapter<T> {

    protected Mode mode;

    protected Yaml yaml() {
        return new Yaml();
    }

    @Override
    public void setMode(Mode mode) {
        this.mode = mode;
    }

    @Override
    public String getDataType() {
        return "TEXT";
    }

    @Override
    public abstract Class<T> getJavaType();

    @Override
    public Object serialize(Object value) {
        return yaml().dumpAs(value, Tag.MAP, FlowStyle.BLOCK);
    }

    @Override
    public T deserialize(Object value) {
        String yaml = value.toString();
        Yaml processor = yaml();
        T t = processor.loadAs(yaml, getJavaType());
        return t;
    }

}