ORA-00972: identifier is too long - Best strategy to avoid it in Grails

Question

I am getting "ORA-00972: identifier is too long" error while saving a domain class object.

Caused by: org.hibernate.exception.SQLGrammarException: could not initialize a collection: [com.intelligrape.model.Address.studentsForPermanentAddressId#79366215]

What could be the possible solutions to solve this problem except reducing the length of studentsForPermanentAddressId field. The reason being, this is a legacy database table which I can not alter.

EDIT: Added the domain class description as asked by Rob Hruska

package com.intelligrape.model

class Address {

    String address1
    String address2
    String boxNumber
    String city
    Long stateLid
    String province
    String zipCode
    Long countryLid
    Double latitude
    Double longitude
    Long radius

    static hasMany = [studentsForPermanentAddressId: Student, studentsForLocalAddressId: Student]

static constraints = {
        address1 nullable: true
        address2 nullable: true
        boxNumber nullable: true, size: 1..25
        city nullable: true, size: 1..30
        stateLid nullable: true
        province nullable: true, size: 1..64
        zipCode nullable: true, size: 1..15
        countryLid nullable: true
        latitude nullable: true
        longitude nullable: true
        radius nullable: true
            studentsForPermanentAddressId nullable: true
            studentsForLocalAddressId nullable: true
    }
}

Answer 1

Add a mapping block and the existing column mappings:

    package com.intelligrape.model

class Address {

    String address1
    String address2
    String boxNumber
    String city
    Long stateLid
    String province
    String zipCode
    Long countryLid
    Double latitude
    Double longitude
    Long radius

    static hasMany = [studentsForPermanentAddressId: Student, studentsForLocalAddressId: Student]
    static mappings = {
         studentsForPermanentAddressId(column: 'stud_perm_addr_id')
    }
    static constraints = {
        address1 nullable: true
        address2 nullable: true
        boxNumber nullable: true, size: 1..25
        city nullable: true, size: 1..30
        stateLid nullable: true
        province nullable: true, size: 1..64
        zipCode nullable: true, size: 1..15
        countryLid nullable: true
        latitude nullable: true
        longitude nullable: true
        radius nullable: true
            studentsForPermanentAddressId nullable: true
            studentsForLocalAddressId nullable: true
    }
}

As an aside, if this weren't a legacy database you could use this project: http://code.google.com/p/hibernate-naming-strategy-for-oracle/

To generate correct mappings from the start.