18154768944

Committed 01 Oct 2025 07:26AM UTC coverage: 81.882% (-0.005%) from 81.887%

Build # 18154768944

Build Type

push

github

Committed by

web-flow

Commit Message

Merge pull request #290 from TAKETODAY/dev/jspecify

jspecify

Coverage Stats

59788 of 78013 branches covered (76.64%)

Branch coverage included in aggregate %.

141239 of 167496 relevant lines covered (84.32%)

3.6 hits per line

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77.14

today-context/src/main/java/infra/format/support/CollectionToDelimitedStringConverter.java

/*
 * Copyright 2017 - 2025 the original author or authors.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see [https://www.gnu.org/licenses/]
 */

package infra.format.support;

import org.jspecify.annotations.Nullable;

import java.util.Collection;
import java.util.Collections;
import java.util.Set;
import java.util.stream.Collectors;

import infra.core.TypeDescriptor;
import infra.core.conversion.ConditionalGenericConverter;
import infra.core.conversion.ConversionService;
import infra.format.annotation.Delimiter;

/**
 * Converts a Collection to a delimited String.
 *
 * @author <a href="https://github.com/TAKETODAY">Harry Yang</a>
 * @author Phillip Webb
 * @since 4.0
 */
final class CollectionToDelimitedStringConverter implements ConditionalGenericConverter {

  private final ConversionService conversionService;

  CollectionToDelimitedStringConverter(ConversionService conversionService) {
    this.conversionService = conversionService;
  }

  @Override
  public Set<ConvertiblePair> getConvertibleTypes() {
    return Collections.singleton(new ConvertiblePair(Collection.class, String.class));
  }

  @Override
  public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType) {
    TypeDescriptor sourceElementType = sourceType.getElementDescriptor();
    if (targetType == null || sourceElementType == null) {
      return true;
    }
    return this.conversionService.canConvert(sourceElementType, targetType)
            || sourceElementType.getType().isAssignableFrom(targetType.getType());
  }

  @Nullable
  @Override
  public Object convert(@Nullable Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
    if (source == null) {
      return null;
    }
    Collection<?> sourceCollection = (Collection<?>) source;
    return convert(sourceCollection, sourceType, targetType);
  }

  private Object convert(Collection<?> source, TypeDescriptor sourceType, TypeDescriptor targetType) {
    if (source.isEmpty()) {
      return "";
    }
    return source.stream().map((element) -> convertElement(element, sourceType, targetType))
            .collect(Collectors.joining(getDelimiter(sourceType)));
  }

  private CharSequence getDelimiter(TypeDescriptor sourceType) {
    Delimiter annotation = sourceType.getAnnotation(Delimiter.class);
    return (annotation != null) ? annotation.value() : ",";
  }

  private String convertElement(Object element, TypeDescriptor sourceType, TypeDescriptor targetType) {
    return String.valueOf(
            this.conversionService.convert(element, sourceType.elementDescriptor(element), targetType));
  }

}

1	/*
2	* Copyright 2017 - 2025 the original author or authors.
3	*
4	* This program is free software: you can redistribute it and/or modify
5	* it under the terms of the GNU General Public License as published by
6	* the Free Software Foundation, either version 3 of the License, or
7	* (at your option) any later version.
8	*
9	* This program is distributed in the hope that it will be useful,
10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12	* GNU General Public License for more details.
13	*
14	* You should have received a copy of the GNU General Public License
15	* along with this program. If not, see [https://www.gnu.org/licenses/]
16	*/
17
18	package infra.format.support;
19
20	import org.jspecify.annotations.Nullable;
21
22	import java.util.Collection;
23	import java.util.Collections;
24	import java.util.Set;
25	import java.util.stream.Collectors;
26
27	import infra.core.TypeDescriptor;
28	import infra.core.conversion.ConditionalGenericConverter;
29	import infra.core.conversion.ConversionService;
30	import infra.format.annotation.Delimiter;
31
32	/**
33	* Converts a Collection to a delimited String.
34	*
35	* @author <a href="https://github.com/TAKETODAY">Harry Yang</a>
36	* @author Phillip Webb
37	* @since 4.0
38	*/
39	final class CollectionToDelimitedStringConverter implements ConditionalGenericConverter {
40
41	private final ConversionService conversionService;
42
43	CollectionToDelimitedStringConverter(ConversionService conversionService) {	2✔
44	this.conversionService = conversionService;	3✔
45	}	1✔
46
47	@Override
48	public Set<ConvertiblePair> getConvertibleTypes() {
49	return Collections.singleton(new ConvertiblePair(Collection.class, String.class));	7✔
50	}
51
52	@Override
53	public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType) {
54	TypeDescriptor sourceElementType = sourceType.getElementDescriptor();	3✔
55	if (targetType == null \|\| sourceElementType == null) {	4!
56	return true;	2✔
57	}
58	return this.conversionService.canConvert(sourceElementType, targetType)	7!
59	\|\| sourceElementType.getType().isAssignableFrom(targetType.getType());	2!
60	}
61
62	@Nullable
63	@Override
64	public Object convert(@Nullable Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
65	if (source == null) {	2!
66	return null;	×
67	}
68	Collection<?> sourceCollection = (Collection<?>) source;	3✔
69	return convert(sourceCollection, sourceType, targetType);	6✔
70	}
71
72	private Object convert(Collection<?> source, TypeDescriptor sourceType, TypeDescriptor targetType) {
73	if (source.isEmpty()) {	3!
74	return "";	×
75	}
76	return source.stream().map((element) -> convertElement(element, sourceType, targetType))	16✔
77	.collect(Collectors.joining(getDelimiter(sourceType)));	3✔
78	}
79
80	private CharSequence getDelimiter(TypeDescriptor sourceType) {
81	Delimiter annotation = sourceType.getAnnotation(Delimiter.class);	5✔
82	return (annotation != null) ? annotation.value() : ",";	7✔
83	}
84
85	private String convertElement(Object element, TypeDescriptor sourceType, TypeDescriptor targetType) {
86	return String.valueOf(	7✔
87	this.conversionService.convert(element, sourceType.elementDescriptor(element), targetType));	3✔
88	}
89
90	}

TAKETODAY / today-infrastructure / 18154768944

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