📄 genericvaluelistdynaclass.java
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Iterator gvlI = genericValueList.iterator();
while (gvlI.hasNext() && (limit < 0 || cnt++ < limit) ) {
GenericValue gv = (GenericValue) gvlI.next();
DynaBean bean = createDynaBean();
for (int i = 0; i < properties.length; i++) {
String name = properties[i].getName();
bean.set(name, gv.get(name));
}
rows.add(bean);
}
}
/**
* <p>Create and return a new {@link DynaBean} instance to be used for
* representing a row in the underlying result set.</p>
*/
protected DynaBean createDynaBean() {
return (new BasicDynaBean(this));
}
// ----------------------------------------------------- Instance Variables
/**
* <p>Flag defining whether column names should be lower cased when
* converted to property names.</p>
*/
protected boolean lowerCase = true;
/**
* <p>The set of dynamic properties that are part of this
* {@link DynaClass}.</p>
*/
protected DynaProperty properties[] = null;
/**
* <p>The set of dynamic properties that are part of this
* {@link DynaClass}, keyed by the property name. Individual descriptor
* instances will be the same instances as those in the
* <code>properties</code> list.</p>
*/
protected Map propertiesMap = new HashMap();
// ------------------------------------------------------ DynaClass Methods
/**
* <p>Return the name of this DynaClass (analogous to the
* <code>getName()</code> method of <code>java.lang.Class</code), which
* allows the same <code>DynaClass</code> implementation class to support
* different dynamic classes, with different sets of properties.</p>
*/
public String getName() {
return (this.getClass().getName());
}
/**
* <p>Return a property descriptor for the specified property, if it
* exists; otherwise, return <code>null</code>.</p>
*
* @param name Name of the dynamic property for which a descriptor
* is requested
*
* @exception IllegalArgumentException if no property name is specified
*/
public DynaProperty getDynaProperty(String name) {
if (name == null) {
throw new IllegalArgumentException("No property name specified");
}
return ((DynaProperty) propertiesMap.get(name));
}
/**
* <p>Return an array of <code>ProperyDescriptors</code> for the properties
* currently defined in this DynaClass. If no properties are defined, a
* zero-length array will be returned.</p>
*/
public DynaProperty[] getDynaProperties() {
return (properties);
}
/**
* <p>Instantiate and return a new DynaBean instance, associated
* with this DynaClass. <strong>NOTE</strong> - This operation is not
* supported, and throws an exception.</p>
*
* @exception IllegalAccessException if the Class or the appropriate
* constructor is not accessible
* @exception InstantiationException if this Class represents an abstract
* class, an array class, a primitive type, or void; or if instantiation
* fails for some other reason
*/
public DynaBean newInstance()
throws IllegalAccessException, InstantiationException {
throw new UnsupportedOperationException("newInstance() not supported");
}
/**
* <p>Loads and returns the <code>Class</code> of the given name.
* By default, a load from the thread context class loader is attempted.
* If there is no such class loader, the class loader used to load this
* class will be utilized.</p>
*
* @exception GenericEntityException if an exception was thrown trying to load
* the specified class
*/
protected Class loadClass(String className) throws GenericEntityException {
try {
ClassLoader cl = Thread.currentThread().getContextClassLoader();
if (cl == null) {
cl = this.getClass().getClassLoader();
}
return (cl.loadClass(className));
} catch (Exception e) {
throw new GenericEntityException(
"Cannot load column class '" + className + "': " + e);
}
}
/**
* <p>Factory method to create a new DynaProperty for the given index
* into the result set metadata.</p>
*
* @param metadata is the result set metadata
* @param i is the column index in the metadata
* @return the newly created DynaProperty instance
*/
protected DynaProperty createDynaProperty(
GenericDelegator delegator,
ModelEntity modelEntity,
String fieldName)
throws GenericEntityException {
String name = null;
ModelField modelField = modelEntity.getField(fieldName);
ModelFieldType type = null;
try {
ModelEntity mainModelEntity = modelEntity;
if ( modelEntity.getEntityName().equals("DynamicViewEntity"))
mainModelEntity = ((ModelViewEntity) modelEntity).getMemberModelEntity(((ModelViewEntity) modelEntity).getAlias(0).getEntityAlias());
type = delegator.getEntityFieldType(mainModelEntity, modelField.getType());
} catch (GenericEntityException e) {
Debug.logWarning(e, module);
}
if (type == null) throw new IllegalArgumentException("Type " + modelField.getType() + " not found");
String fieldType = type.getJavaType();
//modelField.get
if (lowerCase) {
name = modelField.getName().toLowerCase();
} else {
name = modelField.getName();
}
String className = null;
className = (String) fieldTypeMap.get(new Integer(SqlJdbcUtil.getType(fieldType)));
// Default to Object type if no class name could be retrieved
// from the metadata
Class clazz = Object.class;
if (className != null) {
clazz = loadClass(className);
}
return new DynaProperty(name, clazz);
}
/**
* <p>Introspect the metadata associated with our result set, and populate
* the <code>properties</code> and <code>propertiesMap</code> instance
* variables.</p>
*
* @param resultSet The <code>resultSet</code> whose metadata is to
* be introspected
*
* @exception GenericEntityException if an error is encountered processing the
* result set metadata
*/
protected void introspect(List genericValueList) throws GenericEntityException {
// Accumulate an ordered list of DynaProperties
ArrayList list = new ArrayList();
GenericValue genericValue = (GenericValue) genericValueList.get(0);
ModelEntity modelEntity = genericValue.getModelEntity();
List fieldNames = fieldsToSelect;
if ( fieldNames == null )
fieldNames = modelEntity.getAllFieldNames();
int n = fieldNames.size();
for (int i = 0; i < n; i++) {
DynaProperty dynaProperty = createDynaProperty(genericValue.getDelegator(), modelEntity, (String) fieldNames.get(i));
if (dynaProperty != null) {
list.add(dynaProperty);
}
}
// Convert this list into the internal data structures we need
properties =
(DynaProperty[]) list.toArray(new DynaProperty[list.size()]);
for (int i = 0; i < properties.length; i++) {
propertiesMap.put(properties[i].getName(), properties[i]);
}
}
protected static Map fieldTypeMap = new HashMap();
static {
fieldTypeMap.put(new Integer(1), "java.lang.String" );
fieldTypeMap.put(new Integer(2), "java.sql.Timestamp");
fieldTypeMap.put(new Integer(3), "java.sql.Time");
fieldTypeMap.put(new Integer(4), "java.sql.Date");
fieldTypeMap.put(new Integer(5), "java.lang.Integer");
fieldTypeMap.put(new Integer(6), "java.lang.Long");
fieldTypeMap.put(new Integer(7), "java.lang.Float");
fieldTypeMap.put(new Integer(8), "java.lang.Double");
fieldTypeMap.put(new Integer(9), "java.lang.Boolean");
fieldTypeMap.put(new Integer(10), "java.lang.Object");
}
}
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