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Apache Commons Lang v3 Source Code Files
Apache Commons Lang 3 is the 3rd version of Apache Commons Lang, which provides a host of helper utilities for the java.lang API.
Apache Commons Lang 3 Source Code files are provided in both binary packge (commons-lang3-3.12.0-bin.zip) and source package (commons-lang3-3.12.0-src.zip). You can download them at Apache Commons Lang Website.
Apache Commons Lang 3 Source Code has no dependencies and is compatible with Java 8 and newer versions. You can compile it to generate your own version of Apache Commons Lang 3 JAR file.
You can also browse the source code below:
✍: FYIcenter
⏎ org/apache/commons/lang3/reflect/TypeLiteral.java
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 org.apache.commons.lang3.reflect; import java.lang.reflect.Type; import java.lang.reflect.TypeVariable; import org.apache.commons.lang3.Validate; /** * <p>Type literal comparable to {@code javax.enterprise.util.TypeLiteral}, * made generally available outside the JEE context. Allows the passing around of * a "token" that represents a type in a typesafe manner, as opposed to * passing the (non-parameterized) {@link Type} object itself. Consider:</p> * <p> * You might see such a typesafe API as: * <pre> * class Typesafe { * <T> T obtain(Class<T> type, ...); * } * </pre> * Consumed in the manner of: * <pre> * Foo foo = typesafe.obtain(Foo.class, ...); * </pre> * Yet, you run into problems when you want to do this with a parameterized type: * <pre> * List<String> listOfString = typesafe.obtain(List.class, ...); // could only give us a raw List * </pre> * {@code java.lang.reflect.Type} might provide some value: * <pre> * Type listOfStringType = ...; // firstly, how to obtain this? Doable, but not straightforward. * List<String> listOfString = (List<String>) typesafe.obtain(listOfStringType, ...); // nongeneric Type would necessitate a cast * </pre> * The "type literal" concept was introduced to provide an alternative, i.e.: * <pre> * class Typesafe { * <T> T obtain(TypeLiteral<T> type, ...); * } * </pre> * Consuming code looks like: * <pre> * List<String> listOfString = typesafe.obtain(new TypeLiteral<List<String>>() {}, ...); * </pre> * <p> * This has the effect of "jumping up" a level to tie a {@code java.lang.reflect.Type} * to a type variable while simultaneously making it short work to obtain a * {@code Type} instance for any given type, inline. * </p> * <p>Additionally {@link TypeLiteral} implements the {@link Typed} interface which * is a generalization of this concept, and which may be implemented in custom classes. * It is suggested that APIs be defined in terms of the interface, in the following manner: * </p> * <pre> * <T> T obtain(Typed<T> typed, ...); * </pre> * * @param <T> the type * @since 3.2 */ public abstract class TypeLiteral<T> implements Typed<T> { @SuppressWarnings("rawtypes") private static final TypeVariable<Class<TypeLiteral>> T = TypeLiteral.class.getTypeParameters()[0]; /** * Represented type. */ public final Type value; private final String toString; /** * The default constructor. */ protected TypeLiteral() { this.value = Validate.notNull(TypeUtils.getTypeArguments(getClass(), TypeLiteral.class).get(T), "%s does not assign type parameter %s", getClass(), TypeUtils.toLongString(T)); this.toString = String.format("%s<%s>", TypeLiteral.class.getSimpleName(), TypeUtils.toString(value)); } @Override public final boolean equals(final Object obj) { if (obj == this) { return true; } if (!(obj instanceof TypeLiteral)) { return false; } final TypeLiteral<?> other = (TypeLiteral<?>) obj; return TypeUtils.equals(value, other.value); } @Override public int hashCode() { return 37 << 4 | value.hashCode(); } @Override public String toString() { return toString; } @Override public Type getType() { return value; } }
⏎ org/apache/commons/lang3/reflect/TypeLiteral.java
Or download all of them as a single archive file:
File name: commons-lang3-3.12.0-sources.jar File size: 651724 bytes Release date: 2020-01-22 Download
⇒ Download and Install commons-lang3-3.8.1-bin.zip
⇐ Download Apache Commons Lang v3 Source Package
2022-10-19, 151802👍, 3💬
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