dev 契约锁

P15GEN2\59518

2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa

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package foundation.data.entity;
 
import foundation.data.meta.field.FieldsRuntime;
import foundation.json.IJSONWriter;
 
public class EntityNode extends Entity {
 
    protected EntityNode parent;
    protected EntitySet children;
    protected int level;
    
    
    public EntityNode(FieldsRuntime entityMeta) {
        super(entityMeta);
        children = new EntitySet(entityMeta);
        level = 0;
    }
    
    public EntityNode getParent() {
        return parent;
    }
    
    public EntitySet getChildren() {
        return children;
    }
    
    public int getLevel() {
        return level;
    }
 
    public void changeParent(EntityNode newParent) throws Exception {
        //1.
        parent.deleteChild(this);
        newParent.addChild(newParent);
        
        //2.
        String parentid = newParent.getString("id");
        set("parent_id", parentid);
    }
    
    private void deleteChild(EntityNode child) {
//        String id = child.getString("id");
        //TODO
    }
 
    public void addChild(EntityNode child) {
        child.level = level + 1;
        child.parent = this;
        children.append(child);
    }
 
    public void deleteChildren() {
        children.clear();
    }
    
    public EntityNode getRoot() {
        EntityNode current = this;
        EntityNode parent = current.parent;
        
        while (parent != null) {
               current = parent;
               parent = current.parent;
        }
        
        return current;
    }
 
    public void setSelected() {
        this.selectState = SelectState.CurrentAndChildren;
        
        if (parent != null) {
            parent.setSelected(SelectState.Current); 
        }
    }
 
    private void setSelected(SelectState state) {
        this.selectState = state;
        
        if (parent != null) {
            parent.setSelected(state); 
        }
    }
 
    public void writeJSON(IJSONWriter writer, SelectState selectState) {
        writer.beginObject();
        
        //1. node 
        super.writeJSONBody(writer);
        writer.write("level", level);
        
        //2. children
        if (children.isEmpty()) {
            writer.writeNull("children");
            writer.endObject();
            return;
        }
        
        writer.beginArray("children");
        for (Entity entity: children) {
            EntityNode child = (EntityNode)entity;
            
            if (SelectState.Current == selectState && (child.selectState == SelectState.Unselect)) {
                continue;
            }
 
            child.writeJSON(writer, child.selectState);
 
        }
        writer.endArray();
        
        writer.endObject();
    }
 
    @Override
    public void writeJSONBody(IJSONWriter writer) {
        super.writeJSONBody(writer);
        
        //1. node 
        writer.write("level", level);
        
        //2. children
        if (!children.isEmpty()) {
            writer.beginArray("children");
            children.writeJSONBody(writer);
            writer.endArray();
        }
    }
}