72 lines
1.9 KiB
Java
72 lines
1.9 KiB
Java
package envoy.data;
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import java.util.function.Function;
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/**
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* Contains a single {@link Config} value as well as the corresponding command line arguments and
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* its default value.
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* <p>
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* All {@code ConfigItem}s are automatically mandatory.
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*
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* @author Kai S. K. Engelbart
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* @param <T> the type of the config item's value
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* @since Envoy Common v0.1-beta
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*/
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public final class ConfigItem<T> {
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private final String commandLong, commandShort;
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private final Function<String, T> parseFunction;
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private T value;
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/**
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* Initializes a {@link ConfigItem}.
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*
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* @param commandLong the long command line argument to set this value
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* @param commandShort the short command line argument to set this value
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* @param parseFunction the {@code Function<String, T>} that parses the value from a string
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* @since Envoy Common v0.1-beta
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*/
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public ConfigItem(String commandLong, String commandShort, Function<String, T> parseFunction) {
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this.commandLong = commandLong;
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this.commandShort = commandShort;
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this.parseFunction = parseFunction;
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}
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/**
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* Parses this {@ConfigItem}'s value from a string.
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*
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* @param input the string to parse from
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* @since Envoy Common v0.1-beta
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*/
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public void parse(String input) {
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value = parseFunction.apply(input);
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}
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/**
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* @return The long command line argument to set the value of this {@link ConfigItem}
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* @since Envoy Common v0.1-beta
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*/
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public String getCommandLong() { return commandLong; }
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/**
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* @return The short command line argument to set the value of this {@link ConfigItem}
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* @since Envoy Common v0.1-beta
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*/
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public String getCommandShort() { return commandShort; }
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/**
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* @return the value of this {@link ConfigItem}
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* @since Envoy Common v0.1-beta
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*/
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public T get() {
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return value;
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}
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/**
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* @param value the value to set
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* @since Envoy Common v0.2-beta
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*/
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protected void setValue(T value) { this.value = value; }
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}
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