File	Doc	Category	Size	Date	Package
MapConstraint.java	API Doc	Example	4124	Sun Dec 14 22:47:38 GMT 2003	oreilly.hcj.datamodeling.constraints

MapConstraint

• java.lang.Object
  • ObjectConstraint

Fields Summary
private Class	keyType Holds value of property keyType.
private Class	valueType Holds value of property valueClass.
private boolean	valueNullable Holds value of property valueNullable.

Constructors Summary

public MapConstraint(String name, boolean optional, Class dataType, Class keyType, Class valueType, boolean valueNullable) Creates a new instance of MapConstraint. param name Contains the name of the constraint. param optional Indicates if the property is optional. param dataType The data type of the object being constrained. param keyType Type to use for keys; null if it doesnt matter. param valueType Type to use for values; null if it doesnt matter. param valueNullable True if a value can be null for a key, otherwise false. throws IllegalArgumentException If dataType isn't a subclass of Map. see mirror.datamodel.constraints.Constraint super(name, optional, dataType); if (!Map.class.isAssignableFrom(dataType)) { throw new IllegalArgumentException("The dataType must be a Map"); //$NON-NLS-1$ } this.keyType = keyType; this.valueType = valueType; this.valueNullable = valueNullable;

Methods Summary
public java.lang.Class	getKeyType() Getter for property keyType. return Value of property keyType. return this.keyType;
public java.lang.Class	getValueType() Getter for property valueClass. return Value of property valueClass. return this.valueType;
public boolean	isValueNullable() Getter for property valueNullable. return Value of property valueNullable. return this.valueNullable;
public void	validate(java.lang.Object obj) Validate the given object against the constraint. param obj The object to validate. throws ConstraintException If the constraint is violated. if (obj == null) { throw new ConstraintException(ConstraintExceptionType.NULL_NOT_ALLOWED); } if (!getDataType() .isAssignableFrom(obj.getClass())) { throw new ConstraintException(ConstraintExceptionType.INVALID_DATA_TYPE); } Map tgtMap = (Map)obj; if (tgtMap.isEmpty()) { if (!isOptional()) { throw new ConstraintException(ConstraintExceptionType.MAP_CANNOT_BE_EMPTY); } } Set keys = tgtMap.keySet(); Iterator iter = keys.iterator(); Object value = null; Object key = null; while (iter.hasNext()) { key = iter.next(); if (keyType != null) { if (!(key.getClass().equals(keyType))) { throw new ConstraintException(ConstraintExceptionType.INVALID_COLLECTION_MEMBER); } } value = tgtMap.get(key); if (valueType != null) { if (value == null) { if (!valueNullable) { throw new ConstraintException(ConstraintExceptionType.MAP_CANNOT_HAVE_NULL_VALUE); } } else { if (!(value.getClass().equals(valueType))) { throw new ConstraintException(ConstraintExceptionType.MAP_CONTAINS_INVALID_VALUE); } } } }