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DataNucleus Core provides the primary components of a heterogenous Java persistence solution. It supports persistence API's being layered on top of the core functionality. Also includes the JDO API.

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/**********************************************************************
Copyright (c) 2004 Andy Jefferson and others. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. 


Contributors:
    ...
**********************************************************************/
package org.datanucleus.metadata;

/**
 * MetaData representing a unique constraint.
 */
public class UniqueMetaData extends ConstraintMetaData
{
    private static final long serialVersionUID = -707369332288973459L;
    /** Whether the unique is initially deferred. */
    boolean deferred = false;

    public UniqueMetaData()
    {
    }

    /**
     * Copy constructor.
     * @param umd The metadata to copy
     */
    public UniqueMetaData(UniqueMetaData umd)
    {
        super(umd);
        this.deferred = umd.deferred;
    }

    public final boolean isDeferred()
    {
        return deferred;
    }

    public UniqueMetaData setDeferred(boolean deferred)
    {
        this.deferred = deferred;
        return this;
    }

    // -------------------------------- Utilities ------------------------------

    /**
     * Returns a string representation of the object.
     * This can be used as part of a facility to output a MetaData file. 
     * @param prefix prefix string
     * @param indent indent string
     * @return a string representation of the object.
     */
    public String toString(String prefix,String indent)
    {
        StringBuilder sb = new StringBuilder();
        sb.append(prefix).append("\n") : ">\n");

        if (memberNames != null)
        {
            for (String memberName : memberNames)
            {
                sb.append(prefix).append(indent).append("");
            }
        }
        if (columnNames != null)
        {
            for (String columnName : columnNames)
            {
                sb.append(prefix).append(indent).append("");
            }
        }

        // Add extensions
        sb.append(super.toString(prefix + indent,indent));

        sb.append(prefix).append("\n");
        return sb.toString();
    }
}