dev 契约锁

P15GEN2\59518

2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa

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package foundation.persist;
 
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
 
import foundation.data.meta.field.Field;
import foundation.data.meta.field.FieldsRuntime;
import foundation.util.Util;
 
 
public class SQLBuilder {
 
    public static String getCreateTableSQL(FieldsRuntime tableMeta, String table, Collection<Field> fields) {
        Set<Field> allFields = new HashSet<Field>();
        
        allFields.addAll(tableMeta.getFields());
        
        allFields.addAll(fields);
        
        return getCreateTableSQL(allFields, table);
    }
    
    public static String getCreateTableSQL(FieldsRuntime tableMeta, String table) {
        Set<Field> fields = new HashSet<Field>();
        
        fields.addAll(tableMeta.getFields());
 
        return getCreateTableSQL(fields, table);
    }
    
    private static String getCreateTableSQL(Collection<Field> fields, String table) {
        if (table == null) {
            return null;
        }
        
        StringBuilder result = new StringBuilder();
        result.append("CREATE TABLE ").append(table.toUpperCase()).append("(");
        boolean empty = true;
        
        for (Field field: fields) {
            if (!empty) {
                result.append(", ");
            }
            
            String name = field.getName();
            result.append(Util.doubleQuotedStr(name.toUpperCase())).append(" ");
            result.append(field.getTypeSQLSegment());
            
            empty = false;
        }
        
        result.append(")");
        
        return result.toString();        
    }
 
    public static String getModifyTableSQL(List<Field> fieldList, String table) {
        StringBuilder result = new StringBuilder();
        result.append("ALTER TABLE ").append(table.toUpperCase()).append(" ADD (");
        boolean empty = true;
        
        for (Field field: fieldList) {
            if (!empty) {
                result.append(", ");
            }
            
            result.append(field.getName().toUpperCase()).append(" ");
            result.append(field.getTypeSQLSegment()).append(field.getNullableSQLSegment());
            
            empty = false;
        }
        
        result.append(")");
        
        return result.toString();
    }
 
    public static String getCreateIndexSQL(String table, String[] keyFields) {
        if (table == null) {
            return null;
        }
        
        StringBuilder result = new StringBuilder();
        result.append("CREATE UNIQUE INDEX ").append("IDX_").append(table.toUpperCase());
        result.append(" ON ").append(table).append(" (");
        
        boolean empty = true;
        
        for (String field: keyFields) {
            if (!empty) {
                result.append(", ");
            }
            
            result.append(field);
            empty = false;
        }
        
        result.append(")");
        
        return result.toString();
    }
}