/*
    * SPDX-FileCopyrightText: none
    * SPDX-License-Identifier: CC0-1.0
    */
   
   package dev.metaschema.core.mdm.impl;
   
   import java.util.Collection;
   import java.util.List;
  
  import dev.metaschema.core.mdm.IDMFieldNodeItem;
  import dev.metaschema.core.metapath.item.atomic.IAnyAtomicItem;
  import dev.metaschema.core.metapath.item.node.IModelNodeItem;
  import dev.metaschema.core.model.IFieldDefinition;
  import dev.metaschema.core.model.IFieldInstance;
  import dev.metaschema.core.qname.IEnhancedQName;
  import dev.metaschema.core.util.CollectionUtil;
  import edu.umd.cs.findbugs.annotations.NonNull;
  
  /**
   * This abstract Metapath field node item implementation supports creating a
   * Metaschema module-based data model.
   */
  public abstract class AbstractDMFieldNodeItem
      extends AbstractDMModelNodeItem<IFieldDefinition, IFieldInstance>
      implements IDMFieldNodeItem {
    @NonNull
    private IAnyAtomicItem value;
  
    /**
     * Construct a new node item.
     *
     * @param value
     *          the initial field value
     */
    protected AbstractDMFieldNodeItem(@NonNull IAnyAtomicItem value) {
      // only allow extending classes to create instances
      this.value = value;
    }
  
    @Override
    public IAnyAtomicItem toAtomicItem() {
      return value;
    }
  
    /**
     * Change the field's value to the provided value.
     *
     * @param value
     *          the new field value
     */
    public void setValue(@NonNull IAnyAtomicItem value) {
      this.value = getValueItemType().cast(value);
    }
  
    /**
     * Change the field's value to the provided value.
     * <p>
     * This method expects the provided value to align with the object type
     * supported by the underlying atomic type.
     *
     * @param value
     *          the new field value
     */
    public void setValue(@NonNull Object value) {
      this.value = getValueItemType().newItem(value);
    }
  
    @Override
    public String stringValue() {
      return toAtomicItem().asString();
    }
  
    @Override
    protected String getValueSignature() {
      return toAtomicItem().toSignature();
    }
  
    @Override
    public Collection<? extends List<? extends IModelNodeItem<?, ?>>> getModelItems() {
      // no model items
      return CollectionUtil.emptyList();
    }
  
    @Override
    public List<? extends IModelNodeItem<?, ?>> getModelItemsByName(IEnhancedQName name) {
      // no model items
      return CollectionUtil.emptyList();
    }
  
  }