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    • com.crashnote.core.config.helper.ConfigValue Maven / Gradle / Ivy

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    /**
 *   Copyright (C) 2011-2012 Typesafe Inc. 
 */
package com.crashnote.core.config.helper;

/**
 * An immutable value, following the JSON type
 * schema.
 *
 * 
    
 * Because this object is immutable, it is safe to use from multiple threads and
 * there's no need for "defensive copies."
 *
 * 
    
 * Do not implement {@code ConfigValue}; it should only be implemented
 * by the config library. Arbitrary implementations will not work because the
 * library internals assume a specific concrete implementation. Also, this
 * interface is likely to grow new methods over time, so third-party
 * implementations will break.
 */
public interface ConfigValue extends ConfigMergeable {
    /**
     * The origin of the value (file, line number, etc.), for debugging and
     * error messages.
     *
     * @return where the value came from
     */
    ConfigOrigin origin();

    /**
     * The {@link ConfigValueType} of the value; matches the JSON type schema.
     *
     * @return value's type
     */
    ConfigValueType valueType();

    /**
     * Returns the value as a plain Java boxed value, that is, a {@code String},
     * {@code Number}, {@code Boolean}, {@code Map},
     * {@code List}, or {@code null}, matching the {@link #valueType()}
     * of this {@code ConfigValue}. If the value is a {@link ConfigObject} or
     * {@link ConfigList}, it is recursively unwrapped.
     */
    Object unwrapped();

    /**
     * Renders the config value as a HOCON string. This method is primarily
     * intended for debugging, so it tries to add helpful comments and
     * whitespace.
     *
     * 
    
     * If the config value has not been resolved (see {@link Config#resolve}),
     * it's possible that it can't be rendered as valid HOCON. In that case the
     * rendering should still be useful for debugging but you might not be able
     * to parse it.
     *
     * 
    
     * This method is equivalent to
     * {@code render(ConfigRenderOptions.defaults())}.
     *
     * @return the rendered value
     */
    String render();

    /**
     * Renders the config value to a string, using the provided options.
     *
     * 
    
     * If the config value has not been resolved (see {@link Config#resolve}),
     * it's possible that it can't be rendered as valid HOCON. In that case the
     * rendering should still be useful for debugging but you might not be able
     * to parse it.
     *
     * 
    
     * If the config value has been resolved and the options disable all
     * HOCON-specific features (such as comments), the rendering will be valid
     * JSON. If you enable HOCON-only features such as comments, the rendering
     * will not be valid JSON.
     * 
     * @param options
     *            the rendering options
     * @return the rendered value
     */
    String render(ConfigRenderOptions options);

    @Override
    ConfigValue withFallback(ConfigMergeable other);
}
    
    
    
    

    




    
    
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