}

        private void writeExtraInfo(Map<NamespaceId, String> extraInfo) throws IOException {
            writeCount(extraInfo.size());
            for (Map.Entry<NamespaceId, String> entry : extraInfo.entrySet()) {
                NamespaceId namespaceId = entry.getKey();
                writeString(namespaceId.getNamespace());
                writeString(namespaceId.getName());
                writeString(entry.getValue());

    }

    @SuppressWarnings("deprecation")
    public Map<NamespaceId, String> extractExtraAttributes(ModuleDescriptor ivyDescriptor) {
        Map<String, String> extraInfo = ivyDescriptor.getExtraInfo();
        return extraInfo.entrySet().stream().collect(
            Collectors.toMap(e -> NamespaceId.decode(e.getKey()), Map.Entry::getValue));
    }

public class DefaultIvyModuleDescriptor implements IvyModuleDescriptor {
    private final String branch;
    private final String ivyStatus;
    private final IvyExtraInfo extraInfo;

    public DefaultIvyModuleDescriptor(Map<NamespaceId, String> extraInfo, @Nullable String branch, String ivyStatus) {
        this.extraInfo = new DefaultIvyExtraInfo(extraInfo);
        this.branch = branch;
        this.ivyStatus = ivyStatus;
    }

    @Override

 */
package org.gradle.internal.component.external.model.ivy;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import org.gradle.api.internal.artifacts.ivyservice.NamespaceId;
import org.gradle.internal.component.external.descriptor.Artifact;
import org.gradle.internal.component.external.descriptor.Configuration;
import org.gradle.internal.component.external.model.ModuleComponentResolveMetadata;

import com.google.common.collect.ImmutableSet;
import org.gradle.api.artifacts.component.ModuleComponentIdentifier;
import org.gradle.api.artifacts.component.ModuleComponentSelector;
import org.gradle.api.internal.artifacts.ivyservice.NamespaceId;
import org.gradle.internal.component.external.descriptor.Artifact;
import org.gradle.internal.component.external.descriptor.Configuration;

import org.gradle.api.artifacts.component.ModuleComponentIdentifier;
import org.gradle.api.internal.artifacts.DefaultModuleIdentifier;
import org.gradle.api.internal.artifacts.ivyservice.NamespaceId;
import org.gradle.api.internal.artifacts.repositories.metadata.IvyMutableModuleMetadataFactory;
import org.gradle.internal.component.external.descriptor.Artifact;

import javax.xml.namespace.QName
import spock.lang.Specification

class DefaultIvyModuleDescriptorTest extends Specification {
    def "getExtraInfo returns immutable map"() {
        setup:
        def map = [(new NamespaceId('http://my.extra.info', 'some')): 'value']
        def ivyModuleDescriptor = new DefaultIvyModuleDescriptor(map, null, null)

        when:

import org.gradle.api.InvalidUserDataException;
import org.gradle.api.artifacts.component.ModuleComponentIdentifier;
import org.gradle.api.artifacts.component.ModuleComponentSelector;
import org.gradle.api.internal.artifacts.ivyservice.NamespaceId;
import org.gradle.api.internal.attributes.ImmutableAttributes;
import org.gradle.internal.Cast;
import org.gradle.internal.component.external.descriptor.Artifact;

import org.gradle.api.attributes.Attribute
import org.gradle.api.internal.artifacts.ComponentMetadataProcessor
import org.gradle.api.internal.artifacts.ComponentMetadataProcessorFactory
import org.gradle.api.internal.artifacts.ivyservice.NamespaceId
import org.gradle.api.internal.artifacts.ivyservice.resolutionstrategy.DefaultCachePolicy
import org.gradle.cache.internal.DefaultInMemoryCacheDecoratorFactory
import org.gradle.cache.scopes.GlobalScopedCacheBuilderFactory

        then:
        metadata.id == componentId("myorg", "mymodule", "myrev")
        metadata.extraAttributes.size() == 2
        metadata.extraAttributes[new NamespaceId("namespace-b", "a")] == "info 1"
        metadata.extraAttributes[new NamespaceId("namespace-c", "a")] == "info 2"
    }

    def 'parses old gradle module metadata marker'() {
        when:
        def file = temporaryFolder.file("ivy.xml") << """