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* Add support for JLS records as beans * Avoid `Map.copyOf` as iteration is random
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* | ||
| * Copyright 2001-present Stephen Colebourne | ||
| * | ||
| * Licensed 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.joda.beans.impl; | ||
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|
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| import java.lang.invoke.MethodHandles; | ||
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| import org.joda.beans.ImmutableBean; | ||
| import org.joda.beans.JodaBeanUtils; | ||
| import org.joda.beans.MetaBean; | ||
| import org.joda.beans.TypedMetaBean; | ||
|
|
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| /** | ||
| * A bean that is implemented using the record language feature. | ||
| * <p> | ||
| * Simply add {@code implements RecordBean<MyRecord>} to the record to turn it into a bean. | ||
| * There is no need to add annotations. Derived properties are not supported. | ||
| * <p> | ||
| * For public records, this is the approach to use:. | ||
| * {@snippet lang="java": | ||
| * public static record StringIntPair(String first, int second) implements RecordBean<StrngIntPair> { | ||
| * } | ||
| * } | ||
| * <p> | ||
| * For non-public records, this is the approach to use: | ||
| * {@snippet lang="java": | ||
| * private static record StringLongPair(String first, long second) implements RecordBean<StringLongPair> { | ||
| * static { | ||
| * RecordBean.register(StringLongPair.class, MethodHandles.lookup()); | ||
| * } | ||
| * } | ||
| * } | ||
| * <p> | ||
| * Note that a public record within a module that doesn't export the record will need to adopt the | ||
| * non-public approach. | ||
| * | ||
| * @param <T> the record bean type | ||
| * @since 3.0.0 | ||
| */ | ||
| public interface RecordBean<T extends RecordBean<T>> extends ImmutableBean { | ||
|
|
||
| /** | ||
| * Registers a meta-bean for the specified record. | ||
| * <p> | ||
| * See the class-level Javadoc to understand when this method should be used. | ||
| * <p> | ||
| * Note that this method must only be called once for each class, and never concurrently. | ||
| * If you follow one of the two patterns in the class-level Javadoc everything will be fine. | ||
| * | ||
| * @param <T> the type of the record | ||
| * @param recordClass the record class, not null | ||
| * @param lookup the lookup object, granting permission to non-accessible methods | ||
| * @return the meta-bean | ||
| * @throws RuntimeException if unable to register the record | ||
| */ | ||
| public static <T extends Record & ImmutableBean> MetaBean register(Class<T> recordClass, MethodHandles.Lookup lookup) { | ||
| JodaBeanUtils.notNull(recordClass, "recordClass"); | ||
| JodaBeanUtils.notNull(lookup, "lookup"); | ||
| validateRecordClass(recordClass); | ||
| var metaBean = new RecordMetaBean<>(recordClass, lookup); | ||
| MetaBean.register(metaBean); | ||
| return metaBean; | ||
| } | ||
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| // Class could be erased, thus we double-check it | ||
| private static <T extends Record & ImmutableBean> void validateRecordClass(Class<T> recordClass) { | ||
| if (!recordClass.isRecord()) { | ||
| throw new IllegalArgumentException( | ||
| "RecordBean can only be used with records: " + recordClass.getName()); | ||
| } | ||
| if (!ImmutableBean.class.isAssignableFrom(recordClass)) { | ||
| throw new IllegalArgumentException( | ||
| "RecordBean can only be used with classes that implement ImmutableBean: " + recordClass.getName()); | ||
| } | ||
| } | ||
|
|
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| //------------------------------------------------------------------------- | ||
| @Override | ||
| @SuppressWarnings("unchecked") | ||
| public default TypedMetaBean<T> metaBean() { | ||
| return (TypedMetaBean<T>) MetaBean.of(getClass()); | ||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| /* | ||
| * Copyright 2001-present Stephen Colebourne | ||
| * | ||
| * Licensed 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.joda.beans.impl; | ||
|
|
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| import org.joda.beans.BeanBuilder; | ||
| import org.joda.beans.ImmutableBean; | ||
| import org.joda.beans.MetaProperty; | ||
|
|
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| /** | ||
| * The RecordBean bean builder. | ||
| * | ||
| * @param <T> the record bean type | ||
| */ | ||
| final class RecordBeanBuilder<T extends ImmutableBean> implements BeanBuilder<T> { | ||
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| private final RecordMetaBean<T> metaBean; | ||
| private final Object[] data; | ||
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| RecordBeanBuilder(RecordMetaBean<T> metaBean, Object[] data) { | ||
| this.metaBean = metaBean; | ||
| this.data = data; | ||
| } | ||
|
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| //----------------------------------------------------------------------- | ||
| @Override | ||
| public Object get(String propertyName) { | ||
| return data[metaBean.index(propertyName)]; | ||
| } | ||
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| @Override | ||
| public <P> P get(MetaProperty<P> metaProperty) { | ||
| return metaProperty.propertyType().cast(get(metaProperty.name())); | ||
| } | ||
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| @Override | ||
| public BeanBuilder<T> set(String propertyName, Object value) { | ||
| data[metaBean.index(propertyName)] = value; | ||
| return this; | ||
| } | ||
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| @Override | ||
| public BeanBuilder<T> set(MetaProperty<?> metaProperty, Object value) { | ||
| return set(metaProperty.name(), value); | ||
| } | ||
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| @Override | ||
| public T build() { | ||
| return metaBean.build(data); | ||
| } | ||
|
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| /** | ||
| * Returns a string that summarises the builder. | ||
| * | ||
| * @return a summary string, not null | ||
| */ | ||
| @Override | ||
| public String toString() { | ||
| return "BeanBuilder: " + metaBean.beanType().getSimpleName(); | ||
| } | ||
| } |
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