001 package org.apache.commons.contract.constraints; 002 003 import org.apache.commons.contract.Context; 004 import org.apache.commons.i18n.bundles.ErrorBundle; 005 import org.apache.commons.i18n.bundles.TextBundle; 006 007 public class BooleanConstraints implements Constraints { 008 public final static String TRUE = Boolean.toString(true); 009 public final static String FALSE = Boolean.toString(false); 010 011 public Object cast(Object value, Context context) throws CastException { 012 if ( value instanceof Boolean) { 013 return value; 014 } 015 try { 016 return Boolean.valueOf(StringConstraints.UNCONSTRAINED.cast(value, null).toString()); 017 } catch ( CastException exception ) { 018 throw new CastException(new ErrorBundle("uncastableBooleanValue", new Object[] { value })); 019 } 020 } 021 022 public void validate(Object value, Context context) throws ValidationException { 023 } 024 025 public TextBundle verboseConstraints() { 026 return new TextBundle("unconstrainedBoolean"); 027 } 028 }