[TAPESTRY-410] IdentityValidator

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.0
• Fix Version/s: 4.1.2
• Component/s: Framework
• Assignee: Andreas Andreou
• Reporter: Ron Piterman
• Created: 17/Jul/05 17:37
• Updated: 17/Mar/07 19:40
• Resolved: 17/Mar/07 19:40

Description

The following class compares the validated field against another field. It works in two modes:
match=<fieldname> and differ=<fieldname>

Cheers,
Ron

package org.apache.tapestry.form.valid;

import org.apache.tapestry.form.IFormComponent;
import org.apache.tapestry.form.TextField;
import org.apache.tapestry.form.ValidationMessages;
import org.apache.tapestry.form.validator.BaseValidator;

public class IdentityValidator extends BaseValidator {
private String _fieldName;
private int _matchType;
private String _identityMessage;

private static final int DIFFER = 0;
private static final int MATCH = 1;

public IdentityValidator()

{ super(); }

public IdentityValidator(String initializer)

{ super(initializer); }

public String toString(IFormComponent field, Object value)

{ if (value == null) return null; return value.toString(); }

public void validate(IFormComponent field, ValidationMessages messages, Object object)
throws ValidatorException

{ TextField referent = (TextField)field.getContainer().getComponent(_fieldName); //TODO: if component is null treat _fieldName as an ognl expression boolean notEq = notEqual ( referent.getValue() , object ); if ( _matchType == MATCH ? notEq : !notEq ) throw new ValidatorException(buildIdentityMessage(messages, field, referent), ValidationConstraint.CONSISTENCY); }

public String getMatch()

{ return _fieldName; }

public void setMatch(String field)

{ _fieldName = field; _matchType = MATCH; }

public String getDiffer()

{ return _fieldName; }

public void setDiffer(String field)

{ _fieldName = field; _matchType = DIFFER; }

/** @since 3.0 */
public String getIdentityMessage()

{ return _identityMessage; }

/**

• Overrides the <code>field-too-short</code> bundle key. Parameter {0}

  is the minimum length.

• Parameter {1}

  is the display name of the field.

• @since 3.0
  */

public void setMinimumLengthMessage(String string)

{ _identityMessage = string; }

/** @since 3.0 */

protected String buildIdentityMessage(ValidationMessages messages, IFormComponent field, IFormComponent referent)
{
Object[] parameters = new Object[]

{ field.getDisplayName(), _matchType, referent.getDisplayName() }

;
return messages.formatValidationMessage(_identityMessage,
"invalid-field-equality", parameters);

}

private boolean notEqual(Object o1, Object o2)

{ if (o1 == null && o2 == null) return false; if (o1 == null || o2 == null) return true; return !o1.equals(o2); }

}

==============================

hivemind:

<contribution configuration-id="tapestry.form.validator.Validators">
<validator name="match" configurable="true"
class="org.apache.tapestry.form.valid.IdentityValidator"/>
</contribution>

<contribution configuration-id="tapestry.form.validator.Validators">
<validator name="differ" configurable="true"
class="org.apache.tapestry.form.valid.IdentityValidator"/>
</contribution>

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