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Backport "Polish @Imports search code"

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Issue: SPR-9925
Backport-Commit: 4cdf46f83c
Conflicts:
	spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassParser.java
This commit is contained in:
Phillip Webb
2012-10-31 09:30:17 -07:00
committed by Chris Beams
parent 1f52f09089
commit a9290d80c4
1 changed files with 10 additions and 18 deletions
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28
org.springframework.context/src/main/java/org/springframework/context/annotation/ConfigurationClassParser.java
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@@ -16,6 +16,8 @@
package org.springframework.context.annotation;
import static org.springframework.context.annotation.MetadataUtils.attributesFor;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
@@ -24,7 +26,6 @@ import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.Map;
import java.util.Set;
import java.util.Stack;
@@ -51,8 +52,6 @@ import org.springframework.core.type.classreading.MetadataReaderFactory;
import org.springframework.core.type.filter.AssignableTypeFilter;
import org.springframework.util.StringUtils;
import static org.springframework.context.annotation.MetadataUtils.*;
/**
* Parses a {@link Configuration} class definition, populating a collection of
* {@link ConfigurationClass} objects (parsing a single Configuration class may result in
@@ -73,8 +72,6 @@ import static org.springframework.context.annotation.MetadataUtils.*;
*/
class ConfigurationClassParser {
private static final String[] EMPTY_IMPORTS = {};
private final MetadataReaderFactory metadataReaderFactory;
private final ProblemReporter problemReporter;
@@ -223,7 +220,10 @@ class ConfigurationClassParser {
}
// process any @Import annotations
processImport(configClass, getImports(metadata.getClassName()), true);
Set<String> imports = getImports(metadata.getClassName(), null, new HashSet<String>());
if (imports != null && !imports.isEmpty()) {
processImport(configClass, imports.toArray(new String[imports.size()]), true);
}
// process any @ImportResource annotations
if (metadata.isAnnotated(ImportResource.class.getName())) {
@@ -285,31 +285,23 @@ class ConfigurationClassParser {
* @return a set of all {@link Import#value() import values} or {@code null}
* @throws IOException if there is any problem reading metadata from the named class
*/
private String[] getImports(String className) throws IOException {
LinkedList<String> imports = new LinkedList<String>();
collectImports(className, imports, new HashSet<String>());
if(imports == null || imports.isEmpty()) {
return EMPTY_IMPORTS;
}
LinkedHashSet<String> uniqueImports = new LinkedHashSet<String>(imports);
return uniqueImports.toArray(new String[uniqueImports.size()]);
}
private void collectImports(String className, LinkedList<String> imports,
private Set<String> getImports(String className, Set<String> imports,
Set<String> visited) throws IOException {
if (visited.add(className)) {
AnnotationMetadata metadata = metadataReaderFactory.getMetadataReader(className).getAnnotationMetadata();
for (String annotationType : metadata.getAnnotationTypes()) {
collectImports(annotationType, imports, visited);
imports = getImports(annotationType, imports, visited);
}
Map<String, Object> attributes = metadata.getAnnotationAttributes(Import.class.getName(), true);
if (attributes != null) {
String[] value = (String[]) attributes.get("value");
if (value != null && value.length > 0) {
imports = (imports == null ? new LinkedHashSet<String>() : imports);
imports.addAll(Arrays.asList(value));
}
}
}
return imports;
}
private void processImport(ConfigurationClass configClass, String[] classesToImport, boolean checkForCircularImports) throws IOException {