25 lines
696 B
Java
25 lines
696 B
Java
// onjava/BasicSupplier.java
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// Automatically create a Supplier, given a class
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// with a default (no-arg) constructor.
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package onjava;
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import java.util.function.*;
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public class BasicSupplier<T> implements Supplier<T> {
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private Class<T> type;
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public BasicSupplier(Class<T> type){ this.type = type; }
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@Override
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public T get() {
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try {
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// Assumes type is a public class:
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return type.newInstance();
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} catch(InstantiationException |
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IllegalAccessException e) {
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throw new RuntimeException(e);
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}
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}
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// Produce a Default generator given a type token:
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public static <T> Supplier<T> create(Class<T> type) {
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return new BasicSupplier<>(type);
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}
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}
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