Categories:
Audio (13)
Biotech (29)
Bytecode (36)
Database (77)
Framework (7)
Game (7)
General (507)
Graphics (53)
I/O (35)
IDE (2)
JAR Tools (101)
JavaBeans (21)
JDBC (121)
JDK (426)
JSP (20)
Logging (108)
Mail (58)
Messaging (8)
Network (84)
PDF (97)
Report (7)
Scripting (84)
Security (32)
Server (121)
Servlet (26)
SOAP (24)
Testing (54)
Web (15)
XML (309)
Collections:
Other Resources:
commons-collections4-4.4-sources.jar - Apache Commons Collections
commons-collections4-4.4-sources.jar is the source JAR file for Apache Commons Collections 4.2, which provides additional collection handling functionalities on top of JDK library.
JAR File Size and Download Location:
JAR name: commons-collections4-4.4-sources.jar Target JDK version: 8 Dependency: None File size: 715,541 bytes Release date: 05-Jul-2019 Download: Apache Commons Collections
✍: FYIcenter.com
⏎ org/apache/commons/collections4/TransformerUtils.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.collections4; import java.util.Collection; import java.util.Map; import org.apache.commons.collections4.functors.ChainedTransformer; import org.apache.commons.collections4.functors.CloneTransformer; import org.apache.commons.collections4.functors.ClosureTransformer; import org.apache.commons.collections4.functors.ConstantTransformer; import org.apache.commons.collections4.functors.EqualPredicate; import org.apache.commons.collections4.functors.ExceptionTransformer; import org.apache.commons.collections4.functors.FactoryTransformer; import org.apache.commons.collections4.functors.IfTransformer; import org.apache.commons.collections4.functors.InstantiateTransformer; import org.apache.commons.collections4.functors.InvokerTransformer; import org.apache.commons.collections4.functors.MapTransformer; import org.apache.commons.collections4.functors.NOPTransformer; import org.apache.commons.collections4.functors.PredicateTransformer; import org.apache.commons.collections4.functors.StringValueTransformer; import org.apache.commons.collections4.functors.SwitchTransformer; /** * <code>TransformerUtils</code> provides reference implementations and * utilities for the Transformer functor interface. The supplied transformers are: * <ul> * <li>Invoker - returns the result of a method call on the input object * <li>Clone - returns a clone of the input object * <li>Constant - always returns the same object * <li>Closure - performs a Closure and returns the input object * <li>Predicate - returns the result of the predicate as a Boolean * <li>Factory - returns a new object from a factory * <li>Chained - chains two or more transformers together * <li>If - calls one transformer or another based on a predicate * <li>Switch - calls one transformer based on one or more predicates * <li>SwitchMap - calls one transformer looked up from a Map * <li>Instantiate - the Class input object is instantiated * <li>Map - returns an object from a supplied Map * <li>Null - always returns null * <li>NOP - returns the input object, which should be immutable * <li>Exception - always throws an exception * <li>StringValue - returns a <code>java.lang.String</code> representation of the input object * </ul> * <p> * Since v4.1 only transformers which are considered to be safe are * Serializable. Transformers considered to be unsafe for serialization are: * </p> * <ul> * <li>Invoker * <li>Clone * <li>Instantiate * </ul> * * @since 3.0 */ public class TransformerUtils { /** * This class is not normally instantiated. */ private TransformerUtils() {} /** * Gets a transformer that always throws an exception. * This could be useful during testing as a placeholder. * * @param <I> the input type * @param <O> the output type * @return the transformer * @see ExceptionTransformer */ public static <I, O> Transformer<I, O> exceptionTransformer() { return ExceptionTransformer.exceptionTransformer(); } /** * Gets a transformer that always returns null. * * @param <I> the input type * @param <O> the output type * @return the transformer * @see ConstantTransformer */ public static <I, O> Transformer<I, O> nullTransformer() { return ConstantTransformer.nullTransformer(); } /** * Gets a transformer that returns the input object. * The input object should be immutable to maintain the * contract of Transformer (although this is not checked). * * @param <T> the input/output type * @return the transformer * @see NOPTransformer */ public static <T> Transformer<T, T> nopTransformer() { return NOPTransformer.nopTransformer(); } /** * Gets a transformer that returns a clone of the input object. * The input object will be cloned using one of these techniques (in order): * <ul> * <li>public clone method</li> * <li>public copy constructor</li> * <li>serialization clone</li> * </ul> * * @param <T> the input/output type * @return the transformer * @see CloneTransformer */ public static <T> Transformer<T, T> cloneTransformer() { return CloneTransformer.cloneTransformer(); } /** * Creates a Transformer that will return the same object each time the * transformer is used. * * @param <I> the input type * @param <O> the output type * @param constantToReturn the constant object to return each time in the transformer * @return the transformer. * @see ConstantTransformer */ public static <I, O> Transformer<I, O> constantTransformer(final O constantToReturn) { return ConstantTransformer.constantTransformer(constantToReturn); } /** * Creates a Transformer that calls a Closure each time the transformer is used. * The transformer returns the input object. * * @param <T> the input/output type * @param closure the closure to run each time in the transformer, not null * @return the transformer * @throws NullPointerException if the closure is null * @see ClosureTransformer */ public static <T> Transformer<T, T> asTransformer(final Closure<? super T> closure) { return ClosureTransformer.closureTransformer(closure); } /** * Creates a Transformer that calls a Predicate each time the transformer is used. * The transformer will return either Boolean.TRUE or Boolean.FALSE. * * @param <T> the input type * @param predicate the predicate to run each time in the transformer, not null * @return the transformer * @throws NullPointerException if the predicate is null * @see PredicateTransformer */ public static <T> Transformer<T, Boolean> asTransformer(final Predicate<? super T> predicate) { return PredicateTransformer.predicateTransformer(predicate); } /** * Creates a Transformer that calls a Factory each time the transformer is used. * The transformer will return the value returned by the factory. * * @param <I> the input type * @param <O> the output type * @param factory the factory to run each time in the transformer, not null * @return the transformer * @throws NullPointerException if the factory is null * @see FactoryTransformer */ public static <I, O> Transformer<I, O> asTransformer(final Factory<? extends O> factory) { return FactoryTransformer.factoryTransformer(factory); } /** * Create a new Transformer that calls each transformer in turn, passing the * result into the next transformer. * * @param <T> the input/output type * @param transformers an array of transformers to chain * @return the transformer * @throws NullPointerException if the transformers array or any of the transformers is null * @see ChainedTransformer */ public static <T> Transformer<T, T> chainedTransformer( final Transformer<? super T, ? extends T>... transformers) { return ChainedTransformer.chainedTransformer(transformers); } /** * Create a new Transformer that calls each transformer in turn, passing the * result into the next transformer. The ordering is that of the iterator() * method on the collection. * * @param <T> the input/output type * @param transformers a collection of transformers to chain * @return the transformer * @throws NullPointerException if the transformers collection or any of the transformers is null * @see ChainedTransformer */ public static <T> Transformer<T, T> chainedTransformer( final Collection<? extends Transformer<? super T, ? extends T>> transformers) { return ChainedTransformer.chainedTransformer(transformers); } /** * Create a new Transformer that calls the transformer if the predicate is true, * otherwise the input object is returned unchanged. * * @param <T> the input / output type * @param predicate the predicate to switch on * @param trueTransformer the transformer called if the predicate is true * @return the transformer * @throws NullPointerException if either the predicate or transformer is null * @see IfTransformer * @since 4.1 */ public static <T> Transformer<T, T> ifTransformer(final Predicate<? super T> predicate, final Transformer<? super T, ? extends T> trueTransformer) { return IfTransformer.ifTransformer(predicate, trueTransformer); } /** * Create a new Transformer that calls one of two transformers depending * on the specified predicate. * * @param <I> the input type * @param <O> the output type * @param predicate the predicate to switch on * @param trueTransformer the transformer called if the predicate is true * @param falseTransformer the transformer called if the predicate is false * @return the transformer * @throws NullPointerException if either the predicate or transformer is null * @see IfTransformer * @since 4.1 */ public static <I, O> Transformer<I, O> ifTransformer(final Predicate<? super I> predicate, final Transformer<? super I, ? extends O> trueTransformer, final Transformer<? super I, ? extends O> falseTransformer) { return IfTransformer.ifTransformer(predicate, trueTransformer, falseTransformer); } /** * Create a new Transformer that calls one of two transformers depending * on the specified predicate. * * @param <I> the input type * @param <O> the output type * @param predicate the predicate to switch on * @param trueTransformer the transformer called if the predicate is true * @param falseTransformer the transformer called if the predicate is false * @return the transformer * @throws NullPointerException if either the predicate or transformer is null * @see SwitchTransformer * @deprecated as of 4.1, use {@link #ifTransformer(Predicate, Transformer, Transformer)} */ @SuppressWarnings("unchecked") @Deprecated public static <I, O> Transformer<I, O> switchTransformer(final Predicate<? super I> predicate, final Transformer<? super I, ? extends O> trueTransformer, final Transformer<? super I, ? extends O> falseTransformer) { return SwitchTransformer.switchTransformer(new Predicate[] { predicate }, new Transformer[] { trueTransformer }, falseTransformer); } /** * Create a new Transformer that calls one of the transformers depending * on the predicates. The transformer at array location 0 is called if the * predicate at array location 0 returned true. Each predicate is evaluated * until one returns true. If no predicates evaluate to true, null is returned. * * @param <I> the input type * @param <O> the output type * @param predicates an array of predicates to check * @param transformers an array of transformers to call * @return the transformer * @throws NullPointerException if the either array is null * @throws NullPointerException if any element in the arrays is null * @throws IllegalArgumentException if the arrays have different sizes * @see SwitchTransformer */ public static <I, O> Transformer<I, O> switchTransformer(final Predicate<? super I>[] predicates, final Transformer<? super I, ? extends O>[] transformers) { return SwitchTransformer.switchTransformer(predicates, transformers, null); } /** * Create a new Transformer that calls one of the transformers depending * on the predicates. The transformer at array location 0 is called if the * predicate at array location 0 returned true. Each predicate is evaluated * until one returns true. If no predicates evaluate to true, the default * transformer is called. If the default transformer is null, null is returned. * * @param <I> the input type * @param <O> the output type * @param predicates an array of predicates to check * @param transformers an array of transformers to call * @param defaultTransformer the default to call if no predicate matches, null means return null * @return the transformer * @throws NullPointerException if the either array is null * @throws NullPointerException if any element in the arrays is null * @throws IllegalArgumentException if the arrays have different sizes * @see SwitchTransformer */ public static <I, O> Transformer<I, O> switchTransformer(final Predicate<? super I>[] predicates, final Transformer<? super I, ? extends O>[] transformers, final Transformer<? super I, ? extends O> defaultTransformer) { return SwitchTransformer.switchTransformer(predicates, transformers, defaultTransformer); } /** * Create a new Transformer that calls one of the transformers depending * on the predicates. * <p> * The Map consists of Predicate keys and Transformer values. A transformer * is called if its matching predicate returns true. Each predicate is evaluated * until one returns true. If no predicates evaluate to true, the default * transformer is called. The default transformer is set in the map with a * null key. If no default transformer is set, null will be returned in a default * case. The ordering is that of the iterator() method on the entryset collection * of the map. * * @param <I> the input type * @param <O> the output type * @param predicatesAndTransformers a map of predicates to transformers * @return the transformer * @throws NullPointerException if the map is null * @throws NullPointerException if any transformer in the map is null * @throws ClassCastException if the map elements are of the wrong type * @see SwitchTransformer */ public static <I, O> Transformer<I, O> switchTransformer( final Map<Predicate<I>, Transformer<I, O>> predicatesAndTransformers) { return SwitchTransformer.switchTransformer(predicatesAndTransformers); } /** * Create a new Transformer that uses the input object as a key to find the * transformer to call. * <p> * The Map consists of object keys and Transformer values. A transformer * is called if the input object equals the key. If there is no match, the * default transformer is called. The default transformer is set in the map * using a null key. If no default is set, null will be returned in a default case. * * @param <I> the input type * @param <O> the output type * @param objectsAndTransformers a map of objects to transformers * @return the transformer * @throws NullPointerException if the map is null * @throws NullPointerException if any transformer in the map is null * @see SwitchTransformer */ @SuppressWarnings("unchecked") public static <I, O> Transformer<I, O> switchMapTransformer( final Map<I, Transformer<I, O>> objectsAndTransformers) { if (objectsAndTransformers == null) { throw new NullPointerException("The object and transformer map must not be null"); } final Transformer<? super I, ? extends O> def = objectsAndTransformers.remove(null); final int size = objectsAndTransformers.size(); final Transformer<? super I, ? extends O>[] trs = new Transformer[size]; final Predicate<I>[] preds = new Predicate[size]; int i = 0; for (final Map.Entry<I, Transformer<I, O>> entry : objectsAndTransformers.entrySet()) { preds[i] = EqualPredicate.<I>equalPredicate(entry.getKey()); trs[i++] = entry.getValue(); } return TransformerUtils.switchTransformer(preds, trs, def); } /** * Gets a Transformer that expects an input Class object that it will instantiate. * * @param <T> the output type * @return the transformer * @see InstantiateTransformer */ public static <T> Transformer<Class<? extends T>, T> instantiateTransformer() { return InstantiateTransformer.instantiateTransformer(); } /** * Creates a Transformer that expects an input Class object that it will * instantiate. The constructor used is determined by the arguments specified * to this method. * * @param <T> the output type * @param paramTypes parameter types for the constructor, can be null * @param args the arguments to pass to the constructor, can be null * @return the transformer * @throws IllegalArgumentException if the paramTypes and args don't match * @see InstantiateTransformer */ public static <T> Transformer<Class<? extends T>, T> instantiateTransformer( final Class<?>[] paramTypes, final Object[] args) { return InstantiateTransformer.instantiateTransformer(paramTypes, args); } /** * Creates a Transformer that uses the passed in Map to transform the input * object (as a simple lookup). * * @param <I> the input type * @param <O> the output type * @param map the map to use to transform the objects * @return the transformer, or {@link ConstantTransformer#nullTransformer()} if the * {@code map} is {@code null} * @see MapTransformer */ public static <I, O> Transformer<I, O> mapTransformer(final Map<? super I, ? extends O> map) { return MapTransformer.mapTransformer(map); } /** * Gets a Transformer that invokes a method on the input object. * The method must have no parameters. If the input object is {@code null}, * {@code null} is returned. * * <p> * For example, <code>TransformerUtils.invokerTransformer("getName");</code> * will call the <code>getName</code> method on the input object to * determine the transformer result. * </p> * * @param <I> the input type * @param <O> the output type * @param methodName the method name to call on the input object, may not be null * @return the transformer * @throws NullPointerException if the methodName is null. * @see InvokerTransformer */ public static <I, O> Transformer<I, O> invokerTransformer(final String methodName) { return InvokerTransformer.invokerTransformer(methodName, null, null); } /** * Gets a Transformer that invokes a method on the input object. * The method parameters are specified. If the input object is {@code null}, * {@code null} is returned. * * @param <I> the input type * @param <O> the output type * @param methodName the name of the method * @param paramTypes the parameter types * @param args the arguments * @return the transformer * @throws NullPointerException if the method name is null * @throws IllegalArgumentException if the paramTypes and args don't match * @see InvokerTransformer */ public static <I, O> Transformer<I, O> invokerTransformer(final String methodName, final Class<?>[] paramTypes, final Object[] args) { return InvokerTransformer.invokerTransformer(methodName, paramTypes, args); } /** * Gets a transformer that returns a <code>java.lang.String</code> * representation of the input object. This is achieved via the * <code>toString</code> method, <code>null</code> returns 'null'. * * @param <T> the input type * @return the transformer * @see StringValueTransformer */ public static <T> Transformer<T, String> stringValueTransformer() { return StringValueTransformer.stringValueTransformer(); } }
⏎ org/apache/commons/collections4/TransformerUtils.java
Or download all of them as a single archive file:
File name: commons-collections4-4.4-sources.jar File size: 715541 bytes Release date: 2019-07-05 Download
⇒ Download and Install commons-collections4-4.2-bin.zip
⇐ What Is commons-collections4-4.4.jar
2020-12-15, 113380👍, 0💬
Popular Posts:
How to download and install JDK (Java Development Kit) 7? If you want to write Java applications, yo...
commons-fileupload-1.3.3 -sources.jaris the source JAR file for Apache Commons FileUpload 1.3., whic...
Apache Log4j SLF4J Binding allows applications coded to the SLF4J API to use Log4j 2 as the implemen...
What Is jaxb-impl-2.1.12.jar? Java Architecture for XML Binding (JAXB) is a Java API that allows Jav...
What Is poi-ooxml-5.2.3.jar? poi-ooxml-5.2.3.jar is one of the JAR files for Apache POI 5.2.3, which...