/*
* Copyright 2001-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.axis.encoding.ser;
import org.apache.axis.AxisFault;
import org.apache.axis.Constants;
import org.apache.axis.description.FieldDesc;
import org.apache.axis.description.TypeDesc;
import org.apache.axis.encoding.SerializationContext;
import org.apache.axis.encoding.SimpleType;
import org.apache.axis.encoding.SimpleValueSerializer;
import org.apache.axis.utils.BeanPropertyDescriptor;
import org.apache.axis.utils.BeanUtils;
import org.apache.axis.utils.Messages;
import org.apache.axis.wsdl.fromJava.Types;
import org.w3c.dom.Element;
import org.xml.sax.Attributes;
import org.xml.sax.helpers.AttributesImpl;
import javax.xml.namespace.QName;
import java.io.IOException;
/**
* Serializer for primitives and anything simple whose value is obtained with toString()
*
* @author Rich Scheuerle <dims@yahoo.com>
*/
public class SimpleSerializer implements SimpleValueSerializer {
public QName xmlType;
public Class javaType;
private BeanPropertyDescriptor[] propertyDescriptor = null;
private TypeDesc typeDesc = null;
public SimpleSerializer(Class javaType, QName xmlType) {
this.xmlType = xmlType;
this.javaType = javaType;
init();
}
public SimpleSerializer(Class javaType, QName xmlType, TypeDesc typeDesc) {
this.xmlType = xmlType;
this.javaType = javaType;
this.typeDesc = typeDesc;
init();
}
/**
* Initialize the typeDesc and propertyDescriptor array.
*/
private void init() {
// The typeDesc and propertyDescriptor array are only necessary
// if this class extends SimpleType.
if (SimpleType.class.isAssignableFrom(javaType)) {
// Set the typeDesc if not already set
if (typeDesc == null) {
typeDesc = TypeDesc.getTypeDescForClass(javaType);
}
// Get the cached propertyDescriptor from the type or
// generate a fresh one.
if (typeDesc != null) {
propertyDescriptor = typeDesc.getPropertyDescriptors();
} else {
propertyDescriptor = BeanUtils.getPd(javaType, null);
}
}
}
/**
* Serialize a primitive or simple value.
* If the object to serialize is a primitive, the Object value below
* is the associated java.lang class.
* To determine if the original value is a java.lang class or a primitive, consult
* the javaType class.
*/
public void serialize(QName name, Attributes attributes,
Object value, SerializationContext context)
throws IOException
{
if (value != null && value.getClass() == java.lang.Object.class) {
throw new IOException(Messages.getMessage("cantSerialize02"));
}
// get any attributes
if (value instanceof SimpleType)
attributes = getObjectAttributes(value, attributes, context);
context.startElement(name, attributes);
if (value != null) {
context.writeSafeString(getValueAsString(value, context));
}
context.endElement();
}
public String getValueAsString(Object value, SerializationContext context) {
// We could have separate serializers/deserializers to take
// care of Float/Double cases, but it makes more sence to
// put them here with the rest of the java lang primitives.
if (value instanceof Float ||
value instanceof Double) {
double data = 0.0;
if (value instanceof Float) {
data = ((Float) value).doubleValue();
} else {
data = ((Double) value).doubleValue();
}
if (Double.isNaN(data)) {
return "NaN";
} else if (data == Double.POSITIVE_INFINITY) {
return "INF";
} else if (data == Double.NEGATIVE_INFINITY) {
return "-INF";
}
}
return value.toString();
}
private Attributes getObjectAttributes(Object value,
Attributes attributes,
SerializationContext context) {
if (typeDesc == null || !typeDesc.hasAttributes())
return attributes;
AttributesImpl attrs;
if (attributes == null) {
attrs = new AttributesImpl();
} else if (attributes instanceof AttributesImpl) {
attrs = (AttributesImpl)attributes;
} else {
attrs = new AttributesImpl(attributes);
}
try {
// Find each property that is an attribute
// and add it to our attribute list
for (int i=0; i<propertyDescriptor.length; i++) {
String propName = propertyDescriptor[i].getName();
if (propName.equals("class"))
continue;
FieldDesc field = typeDesc.getFieldByName(propName);
// skip it if its not an attribute
if (field == null || field.isElement())
continue;
QName qname = field.getXmlName();
if (qname == null) {
qname = new QName("", propName);
}
if (propertyDescriptor[i].isReadable() &&
!propertyDescriptor[i].isIndexed()) {
// add to our attributes
Object propValue = propertyDescriptor[i].get(value);
// If the property value does not exist, don't serialize
// the attribute. In the future, the decision to serializer
// the attribute may be more sophisticated. For example, don't
// serialize if the attribute matches the default value.
if (propValue != null) {
String propString = getValueAsString(propValue, context);
String namespace = qname.getNamespaceURI();
String localName = qname.getLocalPart();
attrs.addAttribute(namespace,
localName,
context.qName2String(qname),
"CDATA",
propString);
}
}
}
} catch (Exception e) {
// no attributes
return attrs;
}
return attrs;
}
public String getMechanismType() { return Constants.AXIS_SAX; }
/**
* Return XML schema for the specified type, suitable for insertion into
* the <types> element of a WSDL document, or underneath an
* <element> or <attribute> declaration.
*
* @param javaType the Java Class we're writing out schema for
* @param types the Java2WSDL Types object which holds the context
* for the WSDL being generated.
* @return a type element containing a schema simpleType/complexType
* @see org.apache.axis.wsdl.fromJava.Types
*/
public Element writeSchema(Class javaType, Types types) throws Exception {
// Let the caller generate WSDL if this is not a SimpleType
if (!SimpleType.class.isAssignableFrom(javaType))
return null;
// ComplexType representation of SimpleType bean class
Element complexType = types.createElement("complexType");
types.writeSchemaTypeDecl(xmlType, complexType);
complexType.setAttribute("name", xmlType.getLocalPart());
// Produce simpleContent extending base type.
Element simpleContent = types.createElement("simpleContent");
complexType.appendChild(simpleContent);
Element extension = types.createElement("extension");
simpleContent.appendChild(extension);
// Get the base type from the "value" element of the bean
String base = "string";
for (int i=0; i<propertyDescriptor.length; i++) {
String propName = propertyDescriptor[i].getName();
if (!propName.equals("value")) {
if (typeDesc != null) {
FieldDesc field = typeDesc.getFieldByName(propName);
if (field != null) {
if (field.isElement()) {
// throw?
}
QName qname = field.getXmlName();
if (qname == null) {
// Use the default...
qname = new QName("", propName);
}
// write attribute element
Class fieldType = propertyDescriptor[i].getType();
// Attribute must be a simple type, enum or SimpleType
if (!types.isAcceptableAsAttribute(fieldType)) {
throw new AxisFault(Messages.getMessage("AttrNotSimpleType00",
propName,
fieldType.getName()));
}
// write attribute element
// TODO the attribute name needs to be preserved from the XML
Element elem = types.createAttributeElement(propName,
fieldType,
field.getXmlType(),
false,
extension.getOwnerDocument());
extension.appendChild(elem);
}
}
continue;
}
BeanPropertyDescriptor bpd = propertyDescriptor[i];
Class type = bpd.getType();
// Attribute must extend a simple type, enum or SimpleType
if (!types.isAcceptableAsAttribute(type)) {
throw new AxisFault(Messages.getMessage("AttrNotSimpleType01",
type.getName()));
}
base = types.writeType(type);
extension.setAttribute("base", base);
}
// done
return complexType;
}
}