Most source code targets the daemon and the remaining code either targets a single runtime, for example the Gradle client, or is shared across multiple runtimes.

## Composition by architecture modules

Each [architecture module and platform](platforms.md) can contribute code to any of the runtimes.
Not every module contributes to every runtime.

The core-runtime module defines each runtime:

 * under the License.
 */
package org.apache.maven.model.building;

import org.apache.maven.model.Model;
import org.apache.maven.model.composition.DefaultDependencyManagementImporter;
import org.apache.maven.model.composition.DependencyManagementImporter;
import org.apache.maven.model.inheritance.DefaultInheritanceAssembler;
import org.apache.maven.model.inheritance.InheritanceAssembler;

              <!--              <exclude>org.apache.maven.model.composition.DependencyManagementImporter#importManagement(org.apache.maven.model.Model,java.util.List,org.apache.maven.model.building.ModelBuildingRequest,org.apache.maven.model.building.ModelProblemCollector):METHOD_REMOVED</exclude>-->

    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  /**
   * Returns the composition of two functions. For {@code f: A->B} and {@code g: B->C}, composition
   * is defined as the function h such that {@code h(a) == g(f(a))} for each {@code a}.
   *
   * <p><b>JRE users and Android users who opt in to library desugaring:</b> use {@code

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.model.composition;

import javax.inject.Named;
import javax.inject.Singleton;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.plugin;

import org.apache.maven.model.Plugin;
import org.codehaus.plexus.component.composition.CycleDetectedInComponentGraphException;

/**
 * Exception occurring trying to resolve a plugin.
 *
 */
public class CycleDetectedInPluginGraphException extends Exception {
    private final Plugin plugin;

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.model.composition;

import java.util.List;

import org.apache.maven.model.DependencyManagement;
import org.apache.maven.model.Model;
import org.apache.maven.model.building.ModelBuildingRequest;

import com.google.errorprone.annotations.Immutable;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import org.jspecify.annotations.Nullable;

/**
 * An abstract composition of multiple hash functions. {@linkplain #newHasher()} delegates to the
 * {@code Hasher} objects of the delegate hash functions, and in the end, they are used by

The project state is managed by the `ProjectState` class.
It is created for each project in the build definition, once per build execution and is discarded at the end of the execution.

## Composition by architecture modules

Each [architecture module and platform](platforms.md) can contribute code to any of the elements.
Not every module contributes to every element.

import org.apache.maven.project.artifact.DefaultMetadataSource;
import org.apache.maven.repository.legacy.LegacyRepositorySystem;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.composition.CycleDetectedInComponentGraphException;
import org.codehaus.plexus.testing.PlexusTest;
import org.eclipse.aether.DefaultRepositorySystemSession;
import org.eclipse.aether.internal.impl.DefaultChecksumPolicyProvider;