org.smartdeveloperhub.vocabulary.config.Configuration.java Source code

Introduction

Here is the source code for org.smartdeveloperhub.vocabulary.config.Configuration.java

Source

/**
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   This file is part of the Smart Developer Hub Project:
 *     http://www.smartdeveloperhub.org/
 *
 *   Center for Open Middleware
 *     http://www.centeropenmiddleware.com/
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   Copyright (C) 2015-2016 Center for Open Middleware.
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   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.
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   Artifact    : org.smartdeveloperhub.vocabulary:sdh-vocabulary:0.3.0
 *   Bundle      : sdh-vocabulary-0.3.0.jar
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 */
package org.smartdeveloperhub.vocabulary.config;

import java.util.Map;
import java.util.Set;

import com.fasterxml.jackson.annotation.JsonAnyGetter;
import com.fasterxml.jackson.annotation.JsonAnySetter;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;

public class Configuration {

    @JsonIgnore
    private final Map<String, Object> extensions = Maps.newLinkedHashMap();

    public Configuration() {
        super();
    }

    @JsonAnyGetter
    public Map<String, Object> getExtension() {
        return this.extensions;
    }

    @JsonAnySetter
    public void setExtension(final String name, final Object value) {
        this.extensions.put(name, value);
    }

    public void extend(final Object value) {
        setExtension(getExtensionId(value.getClass()), value);
    }

    public Set<String> extensions() {
        return ImmutableSet.copyOf(this.extensions.keySet());
    }

    public <T> T extension(final String id, final Class<? extends T> clazz) {
        return ConfigurationFactory.convert(this.extensions.get(id), clazz);
    }

    public <T> T extension(final Class<? extends T> clazz) {
        final String id = getExtensionId(clazz);
        final Object source = this.extensions.get(id);
        if (source == null) {
            return null;
        }
        return ConfigurationFactory.convert(source, clazz);
    }

    private <T> String getExtensionId(final Class<? extends T> clazz) {
        final ConfigurationExtension annotation = clazz.getAnnotation(ConfigurationExtension.class);
        String id = null;
        if (annotation != null) {
            id = annotation.value();
        } else {
            id = clazz.getSimpleName();
        }
        Preconditions.checkArgument(id != null, "Unknown extension %s", clazz.getCanonicalName());
        return id;
    }

}