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package oracle.toplink.essentials.tools.schemaframework;

import java.io.*;
import java.util.*;
import oracle.toplink.essentials.exceptions.*;
import oracle.toplink.essentials.internal.sessions.AbstractSession;

/**
 * 

* Purpose: Define a unique key constraint for a table. */ public class UniqueKeyConstraint implements Serializable { protected String name; protected Vector sourceFields; // field names public UniqueKeyConstraint() { this.name = ""; this.sourceFields = new Vector(); } public UniqueKeyConstraint(String name, String sourceField) { this(); this.name = name; sourceFields.addElement(sourceField); } public UniqueKeyConstraint(String name, String[] sourceFields) { this(); this.name = name; for(String sourceField : sourceFields) { this.sourceFields.addElement(sourceField); } } /** * PUBLIC: */ public void addSourceField(String sourceField) { getSourceFields().addElement(sourceField); } /** * INTERNAL: * Append the database field definition string to the table creation statement. */ public void appendDBString(Writer writer, AbstractSession session) { try { writer.write("UNIQUE ("); for (Enumeration sourceEnum = getSourceFields().elements(); sourceEnum.hasMoreElements();) { writer.write((String)sourceEnum.nextElement()); if (sourceEnum.hasMoreElements()) { writer.write(", "); } } writer.write(")"); } catch (IOException ioException) { throw ValidationException.fileError(ioException); } } /** * PUBLIC: */ public String getName() { return name; } /** * PUBLIC: */ public Vector getSourceFields() { return sourceFields; } /** * PUBLIC: */ public void setName(String name) { this.name = name; } /** * PUBLIC: */ public void setSourceFields(Vector sourceFields) { this.sourceFields = sourceFields; } }





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