Add PdxInstanceBuilder class used to create instances of PDX types (PdxInstance).
The Builder allows users to copy an existing PdxInstance to a new PdxInstance or create a PdxInstance from an Object.
This commit is contained in:
John Blum
@@ -0,0 +1,203 @@
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/*
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* Copyright 2020 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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package org.springframework.geode.pdx;
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import java.util.Collections;
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import java.util.List;
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import java.util.Optional;
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import java.util.concurrent.atomic.AtomicReference;
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import org.apache.geode.cache.GemFireCache;
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import org.apache.geode.cache.RegionService;
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import org.apache.geode.pdx.PdxInstance;
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import org.apache.geode.pdx.PdxInstanceFactory;
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import org.springframework.geode.cache.SimpleCacheResolver;
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import org.springframework.util.ObjectUtils;
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/**
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* The {@link PdxInstanceBuilder} class is a <a href="https://en.wikipedia.org/wiki/Builder_pattern">Builder</a>
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* used to construct and initialize a {@link PdxInstance} from different sources.
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*
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* @author John Blum
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* @see org.apache.geode.cache.GemFireCache
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* @see org.apache.geode.cache.RegionService
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* @see org.apache.geode.pdx.PdxInstance
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* @see org.apache.geode.pdx.PdxInstanceFactory
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* @see <a href="https://en.wikipedia.org/wiki/Builder_pattern">Builder Software Design Pattern</a>
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* @since 1.3.0
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*/
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@SuppressWarnings("unused")
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public class PdxInstanceBuilder {
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/**
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* Factory method used to construct a new instance of the {@link PdxInstanceBuilder} class.
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*
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* This factory method tries to resolve the {@link GemFireCache} instance for the caller
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* by using {@link SimpleCacheResolver}.
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*
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* Alternatively, callers may provider their own {@link GemFireCache} instance by calling
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* {@link #create(RegionService)}.
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*
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* @return a new instance of the {@link PdxInstanceBuilder}.
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* @throws IllegalArgumentException if a {@link GemFireCache} instance is not present.
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* @see #create(RegionService)
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*/
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public static PdxInstanceBuilder create() {
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return create(SimpleCacheResolver.getInstance().require());
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}
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/**
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* Factory method use to construct a new instance of the {@link PdxInstanceBuilder} class initialized with
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* the given, required {@link RegionService} used by the Builder to performs its functions.
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*
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* @param regionService {@link RegionService} instance used by the {@link PdxInstanceBuilder} to perform
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* its functions;
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* must not be {@literal null}.
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* @return an new instance of the {@link PdxInstanceBuilder}.
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* @throws IllegalArgumentException if {@link GemFireCache} is {@literal null}.
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* @see org.apache.geode.cache.GemFireCache
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* @see #PdxInstanceBuilder(RegionService)
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*/
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public static PdxInstanceBuilder create(RegionService regionService) {
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return new PdxInstanceBuilder(regionService);
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}
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private static void assertNotNull(Object target, String message, Object... arguments) {
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if (target == null) {
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throw new IllegalArgumentException(String.format(message, arguments));
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}
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}
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private static <T> List<T> nullSafeList(List<T> list) {
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return list != null ? list : Collections.emptyList();
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}
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private final RegionService regionService;
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private PdxInstanceFactory pdxFactory;
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/**
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* Constructs a new instance of {@link PdxInstanceBuilder} initialized with the required {@link RegionService}.
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*
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* @param regionService {@link RegionService} instance used to perform the functions of the PDX Builder.
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* @throws IllegalArgumentException if {@link RegionService} is {@literal null}.
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* @see org.apache.geode.cache.RegionService
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*/
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protected PdxInstanceBuilder(RegionService regionService) {
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assertNotNull(regionService, "RegionService must not be null");
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this.regionService = regionService;
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}
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/**
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* Returns a reference to the configured {@link RegionService} used to perform the operations of this PDX Builder.
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*
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* @return a reference to the configured {@link RegionService}; never {@literal null}.
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*/
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protected RegionService getRegionService() {
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return this.regionService;
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}
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/**
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* Copies the contents of the existing {@link PdxInstance} to a new {@link PdxInstance} built with this Builder.
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*
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* @param pdxInstance {@link PdxInstance} to copy.
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* @return an instance of the {@link PdxInstanceFactory} used to {@link PdxInstanceFactory#create() create}
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* the {@link PdxInstance}.
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* @throws IllegalArgumentException if {@link PdxInstance} is {@literal null}.
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* @see org.apache.geode.pdx.PdxInstance
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* @see org.apache.geode.pdx.PdxInstanceFactory
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*/
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public PdxInstanceFactory copy(PdxInstance pdxInstance) {
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assertNotNull(pdxInstance, "PdxInstance must not be null");
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PdxInstanceFactory factory = getRegionService().createPdxInstanceFactory(pdxInstance.getClassName());
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nullSafeList(pdxInstance.getFieldNames()).forEach(fieldName -> {
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factory.writeObject(fieldName, pdxInstance.getField(fieldName));
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if (pdxInstance.isIdentityField(fieldName)) {
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factory.markIdentityField(fieldName);
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}
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});
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return factory;
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}
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/**
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* Constructs a new {@link PdxInstance} from the given, required source {@link Object}.
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*
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* @param source {@link Object} being serialized to PDX; must not be {@literal null}.
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* @return a {@link Factory} used to create the {@link PdxInstance} from the given,
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* required source {@link Object}, which was serialized to PDX.
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* @throws IllegalArgumentException if {@link Object source} is {@literal null}.
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* @see Factory
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*/
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public Factory from(Object source) {
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assertNotNull(source, "Source object to serialize to PDX must not be null");
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RegionService regionService = getRegionService();
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Optional.of(regionService)
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.filter(GemFireCache.class::isInstance)
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.map(GemFireCache.class::cast)
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.map(GemFireCache::getPdxReadSerialized)
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.filter(Boolean.TRUE::equals)
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.orElseThrow(() -> new IllegalStateException("PDX read-serialized must be set to true"));
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PdxInstanceFactory factory = regionService.createPdxInstanceFactory(source.getClass().getName());
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factory.writeObject("source", source);
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AtomicReference<Object> resolvedSource = new AtomicReference<>(null);
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return () -> Optional.of(factory)
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.map(PdxInstanceFactory::create)
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.map(pdxInstance -> resolvedSource.updateAndGet(it -> pdxInstance.getField("source")))
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.filter(PdxInstance.class::isInstance)
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.map(PdxInstance.class::cast)
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.orElseThrow(() -> {
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String message = String.format("Expected an instance of PDX but was an instance of type [%s];"
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+ " Was PDX read-serialized set to true", ObjectUtils.nullSafeClassName(resolvedSource.get()));
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return new IllegalArgumentException(message);
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});
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}
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@FunctionalInterface
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public interface Factory {
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/**
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* Creates a {@link PdxInstance}.
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*
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* @return the created {@link PdxInstance}.
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* @throws IllegalArgumentException Depending on the implementation, an {@link IllegalArgumentException}
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* may be thrown if the {@link Object created object} is not of type {@link PdxInstance}.
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* @throws ClassCastException Depending on the implementation, a {@link ClassCastException} may be thrown
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* if the {@link Object created object} is not of type {@link PdxInstance}.
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* @see org.apache.geode.pdx.PdxInstance
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*/
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PdxInstance create();
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}
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}
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@@ -0,0 +1,382 @@
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/*
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* Copyright 2020 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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package org.springframework.geode.pdx;
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import static org.assertj.core.api.Assertions.assertThat;
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import static org.mockito.ArgumentMatchers.eq;
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import static org.mockito.Mockito.doReturn;
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import static org.mockito.Mockito.mock;
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import static org.mockito.Mockito.times;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.verifyNoInteractions;
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import static org.mockito.Mockito.verifyNoMoreInteractions;
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import java.util.Arrays;
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import org.junit.Test;
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import org.mockito.InOrder;
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import org.mockito.Mockito;
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import org.apache.geode.cache.GemFireCache;
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import org.apache.geode.cache.RegionService;
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import org.apache.geode.pdx.PdxInstance;
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import org.apache.geode.pdx.PdxInstanceFactory;
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/**
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* Unit Tests for {@link PdxInstanceBuilder}.
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*
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* @author John Blum
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* @see org.junit.Test
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* @see org.mockito.Mockito
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* @see org.apache.geode.cache.GemFireCache
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* @see org.apache.geode.cache.RegionService
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* @see org.apache.geode.pdx.PdxInstance
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* @see org.apache.geode.pdx.PdxInstanceFactory
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* @see org.springframework.geode.pdx.PdxInstanceBuilder
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* @since 1.3.0
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*/
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public class PdxInstanceBuilderUnitTests {
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@Test
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public void constructPdxInstanceBuilderInitializedWithRegionService() {
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RegionService mockRegionService = mock(RegionService.class);
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PdxInstanceBuilder builder = new PdxInstanceBuilder(mockRegionService);
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assertThat(builder).isNotNull();
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assertThat(builder.getRegionService()).isEqualTo(mockRegionService);
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verifyNoInteractions(mockRegionService);
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}
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@Test(expected = IllegalArgumentException.class)
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public void constructPdxInstanceBuilderWithNullRegionService() {
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try {
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new PdxInstanceBuilder(null);
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}
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catch (IllegalArgumentException expected) {
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assertThat(expected).hasMessage("RegionService must not be null");
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assertThat(expected).hasNoCause();
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throw expected;
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}
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}
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@Test
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public void createPdxInstanceBuilderWithRegionService() {
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RegionService mockRegionService = mock(RegionService.class);
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PdxInstanceBuilder builder = PdxInstanceBuilder.create(mockRegionService);
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assertThat(builder).isNotNull();
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assertThat(builder.getRegionService()).isEqualTo(mockRegionService);
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verifyNoMoreInteractions(mockRegionService);
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}
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@Test(expected = IllegalStateException.class)
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public void createPdxInstanceBuilderWithUnresolvableRegionService() {
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try {
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PdxInstanceBuilder.create();
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}
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catch (IllegalStateException expected) {
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assertThat(expected).hasMessage("GemFireCache not found");
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assertThat(expected).hasNoCause();
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throw expected;
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}
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}
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@Test
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public void copyPdxInstance() {
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PdxInstance mockPdxInstance = mock(PdxInstance.class);
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doReturn("example.app.test.model.Type").when(mockPdxInstance).getClassName();
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doReturn("testOne").when(mockPdxInstance).getField(eq("fieldOne"));
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doReturn("testTwo").when(mockPdxInstance).getField(eq("fieldTwo"));
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doReturn(1).when(mockPdxInstance).getField(eq("id"));
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doReturn(Arrays.asList("fieldOne", "id", "fieldTwo")).when(mockPdxInstance).getFieldNames();
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doReturn(true).when(mockPdxInstance).isIdentityField(eq("id"));
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PdxInstanceFactory mockPdxInstanceFactory = mock(PdxInstanceFactory.class);
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RegionService mockRegionService = mock(RegionService.class);
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doReturn(mockPdxInstanceFactory).when(mockRegionService)
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.createPdxInstanceFactory(eq("example.app.test.model.Type"));
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PdxInstanceBuilder builder = PdxInstanceBuilder.create(mockRegionService);
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assertThat(builder).isNotNull();
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assertThat(builder.getRegionService()).isEqualTo(mockRegionService);
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assertThat(builder.copy(mockPdxInstance)).isEqualTo(mockPdxInstanceFactory);
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InOrder inOrder = Mockito.inOrder(mockPdxInstance, mockPdxInstanceFactory, mockRegionService);
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inOrder.verify(mockPdxInstance, times(1)).getClassName();
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inOrder.verify(mockRegionService, times(1))
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.createPdxInstanceFactory(eq("example.app.test.model.Type"));
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inOrder.verify(mockPdxInstance, times(1)).getFieldNames();
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inOrder.verify(mockPdxInstance, times(1)).getField(eq("fieldOne"));
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inOrder.verify(mockPdxInstanceFactory, times(1))
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.writeObject(eq("fieldOne"), eq("testOne"));
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inOrder.verify(mockPdxInstance, times(1)).isIdentityField(eq("fieldOne"));
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inOrder.verify(mockPdxInstance, times(1)).getField(eq("id"));
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inOrder.verify(mockPdxInstanceFactory, times(1))
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.writeObject(eq("id"), eq(1));
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inOrder.verify(mockPdxInstance, times(1)).isIdentityField(eq("id"));
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inOrder.verify(mockPdxInstanceFactory, times(1)).markIdentityField(eq("id"));
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inOrder.verify(mockPdxInstance, times(1)).getField(eq("fieldTwo"));
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inOrder.verify(mockPdxInstanceFactory, times(1))
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.writeObject(eq("fieldTwo"), eq("testTwo"));
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inOrder.verify(mockPdxInstance, times(1)).isIdentityField(eq("fieldTwo"));
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}
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@Test
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public void copyPdxInstanceWhenGetFieldsNamesReturnsNullIsNullSafe() {
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PdxInstance mockPdxInstance = mock(PdxInstance.class);
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PdxInstanceFactory mockPdxInstanceFactory = mock(PdxInstanceFactory.class);
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RegionService mockRegionService = mock(RegionService.class);
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doReturn("example.app.test.model.Type").when(mockPdxInstance).getClassName();
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doReturn(null).when(mockPdxInstance).getFieldNames();
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doReturn(mockPdxInstanceFactory).when(mockRegionService)
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.createPdxInstanceFactory(eq("example.app.test.model.Type"));
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PdxInstanceBuilder builder = PdxInstanceBuilder.create(mockRegionService);
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assertThat(builder).isNotNull();
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assertThat(builder.getRegionService()).isEqualTo(mockRegionService);
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assertThat(builder.copy(mockPdxInstance)).isEqualTo(mockPdxInstanceFactory);
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verify(mockPdxInstance, times(1)).getFieldNames();
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verifyNoInteractions(mockPdxInstanceFactory);
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verify(mockRegionService, times(1))
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.createPdxInstanceFactory(eq("example.app.test.model.Type"));
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}
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@Test(expected = IllegalArgumentException.class)
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public void copyNullPdxInstanceThrowsIllegalArgumentException() {
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RegionService mockRegionService = mock(RegionService.class);
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try {
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PdxInstanceBuilder.create(mockRegionService).copy(null);
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}
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catch (IllegalArgumentException expected) {
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assertThat(expected).hasMessage("PdxInstance must not be null");
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assertThat(expected).hasNoCause();
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throw expected;
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}
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finally {
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verifyNoInteractions(mockRegionService);
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}
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}
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@Test
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public void fromSourceObject() {
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Object source = new Object();
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GemFireCache mockCache = mock(GemFireCache.class);
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PdxInstance mockPdxInstanceHolder = mock(PdxInstance.class);
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PdxInstance mockPdxInstanceSource = mock(PdxInstance.class);
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PdxInstanceFactory mockPdxInstanceFactory = mock(PdxInstanceFactory.class);
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doReturn(true).when(mockCache).getPdxReadSerialized();
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doReturn(mockPdxInstanceFactory).when(mockCache).createPdxInstanceFactory(eq(source.getClass().getName()));
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doReturn(mockPdxInstanceHolder).when(mockPdxInstanceFactory).create();
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doReturn(mockPdxInstanceSource).when(mockPdxInstanceHolder).getField(eq("source"));
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PdxInstanceBuilder builder = PdxInstanceBuilder.create(mockCache);
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assertThat(builder).isNotNull();
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assertThat(builder.getRegionService()).isEqualTo(mockCache);
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PdxInstanceBuilder.Factory factory = builder.from(source);
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assertThat(factory).isNotNull();
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assertThat(factory.create()).isEqualTo(mockPdxInstanceSource);
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verify(mockCache, times(1)).getPdxReadSerialized();
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verify(mockCache, times(1)).createPdxInstanceFactory(eq(source.getClass().getName()));
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verify(mockPdxInstanceFactory, times(1)).writeObject(eq("source"), eq(source));
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verify(mockPdxInstanceFactory, times(1)).create();
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verify(mockPdxInstanceHolder, times(1)).getField(eq("source"));
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verifyNoInteractions(mockPdxInstanceSource);
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}
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@Test(expected = IllegalArgumentException.class)
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public void fromNullSourceObjectThrowsIllegalArgumentException() {
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RegionService mockRegionService = mock(RegionService.class);
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try {
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PdxInstanceBuilder.create(mockRegionService).from(null);
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}
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catch (IllegalArgumentException expected) {
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assertThat(expected).hasMessage("Source object to serialize to PDX must not be null");
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assertThat(expected).hasNoCause();
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throw expected;
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}
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finally {
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verifyNoInteractions(mockRegionService);
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}
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}
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@Test(expected = IllegalStateException.class)
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public void fromNonNullSourceObjectWhenCacheIsNotPresent() {
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RegionService mockRegionService = mock(RegionService.class);
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try {
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PdxInstanceBuilder.create(mockRegionService).from("TEST");
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}
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catch (IllegalStateException expected) {
|
||||
|
||||
assertThat(expected).hasMessage("PDX read-serialized must be set to true");
|
||||
assertThat(expected).hasNoCause();
|
||||
|
||||
throw expected;
|
||||
}
|
||||
finally {
|
||||
verifyNoInteractions(mockRegionService);
|
||||
}
|
||||
}
|
||||
|
||||
@Test(expected = IllegalStateException.class)
|
||||
public void fromNonNullSourceObjectWhenCachePdxReadSerializedIsFalse() {
|
||||
|
||||
GemFireCache mockCache = mock(GemFireCache.class);
|
||||
|
||||
doReturn(false).when(mockCache).getPdxReadSerialized();
|
||||
|
||||
try {
|
||||
PdxInstanceBuilder.create(mockCache).from("TEST");
|
||||
}
|
||||
catch (IllegalStateException expected) {
|
||||
|
||||
assertThat(expected).hasMessage("PDX read-serialized must be set to true");
|
||||
assertThat(expected).hasNoCause();
|
||||
|
||||
throw expected;
|
||||
}
|
||||
finally {
|
||||
verify(mockCache, times(1)).getPdxReadSerialized();
|
||||
}
|
||||
}
|
||||
|
||||
@Test(expected = IllegalArgumentException.class)
|
||||
public void fromNonNullSourceObjectReturningNonPdxInstanceThrowsIllegalArgumentException() {
|
||||
|
||||
Object source = new Object();
|
||||
|
||||
GemFireCache mockCache = mock(GemFireCache.class);
|
||||
|
||||
PdxInstance mockPdxInstanceHolder = mock(PdxInstance.class);
|
||||
|
||||
PdxInstanceFactory mockPdxInstanceFactory = mock(PdxInstanceFactory.class);
|
||||
|
||||
doReturn(true).when(mockCache).getPdxReadSerialized();
|
||||
doReturn(mockPdxInstanceFactory).when(mockCache).createPdxInstanceFactory(eq(source.getClass().getName()));
|
||||
doReturn(mockPdxInstanceHolder).when(mockPdxInstanceFactory).create();
|
||||
doReturn(source).when(mockPdxInstanceHolder).getField(eq("source"));
|
||||
|
||||
PdxInstanceBuilder builder = PdxInstanceBuilder.create(mockCache);
|
||||
|
||||
assertThat(builder).isNotNull();
|
||||
assertThat(builder.getRegionService()).isEqualTo(mockCache);
|
||||
|
||||
PdxInstanceBuilder.Factory factory = builder.from(source);
|
||||
|
||||
assertThat(factory).isNotNull();
|
||||
|
||||
try {
|
||||
factory.create();
|
||||
}
|
||||
catch (IllegalArgumentException expected) {
|
||||
|
||||
assertThat(expected).hasMessage("Expected an instance of PDX but was an instance of type [%s];"
|
||||
+ " Was PDX read-serialized set to true", source.getClass().getName());
|
||||
assertThat(expected).hasNoCause();
|
||||
|
||||
throw expected;
|
||||
}
|
||||
finally {
|
||||
verify(mockCache, times(1)).getPdxReadSerialized();
|
||||
verify(mockCache, times(1)).createPdxInstanceFactory(eq(source.getClass().getName()));
|
||||
verify(mockPdxInstanceFactory, times(1)).writeObject(eq("source"), eq(source));
|
||||
verify(mockPdxInstanceHolder, times(1)).getField(eq("source"));
|
||||
}
|
||||
}
|
||||
|
||||
@Test(expected = IllegalArgumentException.class)
|
||||
public void fromNonNullSourceObjectReturningNullOnPdxInstanceFactoryCreateIsNullSafe() {
|
||||
|
||||
Object source = mock(Object.class);
|
||||
|
||||
GemFireCache mockCache = mock(GemFireCache.class);
|
||||
|
||||
PdxInstanceFactory mockPdxInstanceFactory = mock(PdxInstanceFactory.class);
|
||||
|
||||
doReturn(true).when(mockCache).getPdxReadSerialized();
|
||||
doReturn(mockPdxInstanceFactory).when(mockCache).createPdxInstanceFactory(eq(source.getClass().getName()));
|
||||
doReturn(null).when(mockPdxInstanceFactory).create();
|
||||
|
||||
PdxInstanceBuilder builder = PdxInstanceBuilder.create(mockCache);
|
||||
|
||||
assertThat(builder).isNotNull();
|
||||
assertThat(builder.getRegionService()).isEqualTo(mockCache);
|
||||
|
||||
PdxInstanceBuilder.Factory factory = builder.from(source);
|
||||
|
||||
assertThat(factory).isNotNull();
|
||||
|
||||
try {
|
||||
factory.create();
|
||||
}
|
||||
catch (IllegalArgumentException expected) {
|
||||
|
||||
assertThat(expected).hasMessage("Expected an instance of PDX but was an instance of type [null];"
|
||||
+ " Was PDX read-serialized set to true");
|
||||
assertThat(expected).hasNoCause();
|
||||
|
||||
throw expected;
|
||||
}
|
||||
finally {
|
||||
verify(mockCache, times(1)).getPdxReadSerialized();
|
||||
verify(mockCache, times(1)).createPdxInstanceFactory(eq(source.getClass().getName()));
|
||||
verify(mockPdxInstanceFactory, times(1)).writeObject(eq("source"), eq(source));
|
||||
verifyNoInteractions(source);
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user