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Neo4j kernel is a lightweight, embedded Java database designed to store data structured as graphs rather than tables. For more information, see http://neo4j.org.

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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.neo4j.kernel.api.exceptions.schema;

import org.neo4j.common.TokenNameLookup;
import org.neo4j.exceptions.KernelException;
import org.neo4j.internal.kernel.api.exceptions.schema.SchemaKernelException;
import org.neo4j.internal.schema.SchemaDescriptor;
import org.neo4j.internal.schema.SchemaDescriptorSupplier;
import org.neo4j.kernel.api.exceptions.Status;

public class DropConstraintFailureException extends SchemaKernelException
{
    private final SchemaDescriptorSupplier constraint;
    private final String nameOrSchema;

    public DropConstraintFailureException( SchemaDescriptorSupplier constraint, Throwable cause )
    {
        super( Status.Schema.ConstraintDropFailed, cause, "Unable to drop constraint: " + cause.getMessage() );
        this.constraint = constraint;
        this.nameOrSchema = null;
    }

    public DropConstraintFailureException( SchemaDescriptor constraint, Throwable cause )
    {
        this( () -> constraint, cause );
    }

    public DropConstraintFailureException( String nameOrSchema, Throwable cause )
    {
        // nameOrSchema is just 'name' or 'on schema'
        super( Status.Schema.ConstraintDropFailed, cause, "Unable to drop constraint `" + nameOrSchema + "`: " + cause.getMessage() );
        this.nameOrSchema = nameOrSchema;
        this.constraint = null;
    }

    @Override
    public String getUserMessage( TokenNameLookup tokenNameLookup )
    {
        String message;
        if ( constraint != null )
        {
            message = "Unable to drop constraint on " + constraint.userDescription( tokenNameLookup ) + ": ";

        }
        else if ( nameOrSchema != null )
        {
            message = "Unable to drop constraint `" + nameOrSchema + "`: ";
        }
        else
        {
            return getMessage();
        }

        Throwable cause = getCause();
        if ( cause instanceof KernelException )
        {
            KernelException exception = (KernelException) cause;
            message += exception.getUserMessage( tokenNameLookup );
        }
        else
        {
            message += cause.getMessage();
        }

        return message;
    }
}