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Force.com Web Service Connector
/*
* Copyright (c) 2013, salesforce.com, inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided
* that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list of conditions and the
* following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or other materials provided with the distribution.
*
* Neither the name of salesforce.com, inc. nor the names of its contributors may be used to endorse or
* promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.sforce.ws.bind;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import javax.xml.namespace.QName;
import com.sforce.ws.ConnectionException;
import com.sforce.ws.parser.XmlInputStream;
import com.sforce.ws.parser.XmlOutputStream;
import com.sforce.ws.wsdl.Constants;
/**
* This is a generic XML element -- same a DOM element. In the common case this
* class must be able to hold child elements. We do not have a usecase for it yet.
* So child elements are not implemented.
*
* @author http://cheenath.com
* @version 1.0
* @since 1.0 Dec 12, 2005
*/
public class XmlObject implements XMLizable {
private QName name;
private QName xmlType;
private Object value;
private String defaultNamespace;
private ArrayList children = new ArrayList();
public XmlObject() {
this(null, null);
}
public XmlObject(QName name) {
this(name, null);
}
public XmlObject(QName name, Object value) {
this.name = name;
this.value = value;
}
public QName getName() {
return name;
}
public void setName(QName name) {
this.name = name;
}
public void setDefaultNamespace(String namespace) {
this.defaultNamespace = namespace;
}
public QName getXmlType() {
return xmlType;
}
public Object getValue() {
return value;
}
public void setValue(Object value) {
this.value = value;
}
public boolean hasChildren() {
return children.size() != 0;
}
public XmlObject addField(String name, Object value) {
return addOrSetField(name, value, false);
}
public XmlObject setField(String name, Object value) {
return addOrSetField(name, value, true);
}
/**
* Because we create complex types as subclasses of XMLizable instead of
* XmlObject (and we don't want to change interfaces), this method will
* return this as the complex type subclass of XMLizable, if this represents
* a complex type. If it does not, it will simply return this.
* @return
*/
public XMLizable asTyped() {
return this;
}
/**
* evaluate the given xpath like expression.
* eg xpath: "OpportunityContactRoles/records/Contact/LastName" this will list
* all LastName
*
* @param xpath
* @return
*/
public Iterator evaluate(String xpath) {
if (xpath == null) throw new NullPointerException("xpath can not be null");
ArrayList parents = new ArrayList();
ArrayList nodes = new ArrayList();
parents.add(this);
String[] paths = xpath.split("/");
for (String path : paths) {
nodes = new ArrayList();
for (XmlObject parent : parents) {
Iterator it = parent.getChildren(path);
while (it.hasNext()) nodes.add(it.next());
}
if (nodes.size() == 0) {
break;
} else {
parents = nodes;
}
}
return nodes.iterator();
}
private XmlObject addOrSetField(String n, Object value, boolean set) {
XmlObject child = null;
if (value instanceof XmlObject) {
child = (XmlObject) value;
child.name = getQNameFor(n);
children.add(child);
} else {
if (set) {
child = findField(n);
}
if (child == null) {
child = new XmlObject(getQNameFor(n), value);
children.add(child);
} else {
child.setValue(value);
}
}
return child;
}
private QName getQNameFor(String n) {
String namespace = defaultNamespace == null ? Constants.PARTNER_SOBJECT_NS : defaultNamespace;
return name == null ? new QName(namespace, n) : new QName(name.getNamespaceURI(), n);
}
public boolean removeField(String name) {
XmlObject item = findField(name);
return item != null && children.remove(item);
}
public Object getField(String name) {
//TODO: optimize
XmlObject item = findField(name);
Object result = null;
if (item != null) {
if (item.hasChildren()) {
result = item;
} else {
result = item.getValue();
}
}
return result;
}
public XmlObject getChild(String name) {
return findField(name);
}
private XmlObject findField(String name) {
XmlObject item = null;
for (XmlObject child : children) {
if (child.getName().getLocalPart().equals(name)) {
item = child;
break;
}
}
return item;
}
public Iterator getChildren() {
return children.iterator();
}
public Iterator getChildren(String name) {
ArrayList result = new ArrayList();
for (XmlObject child : children) {
if (child.getName().getLocalPart().equals(name)) {
result.add(child);
}
}
return result.iterator();
}
/**
* Similar to {@link #asTyped()}, this will return this object's children
* as the proper complex type subclass of XMLizable, if they are complex
* types. If a child is not a complex type, it will be returned as-is,
* as an XmlObject.
* @return
*/
public Iterator getTypedChildren() {
ArrayList result = new ArrayList(children.size());
for (XmlObject child : children) {
result.add(child.asTyped());
}
return result.iterator();
}
@Override
public String toString() {
return "XmlObject{" +
"name=" + name +
", value=" + value +
", children=" + children +
'}';
}
@Override
public void write(QName element, XmlOutputStream out, TypeMapper typeMapper) throws IOException {
typeMapper.writeFieldXsiType(true);
if (hasChildren()) {
out.writeStartTag(element.getNamespaceURI(), element.getLocalPart());
for (XmlObject child : children) {
child.write(child.getName(), out, typeMapper);
}
out.writeEndTag(element.getNamespaceURI(), element.getLocalPart());
} else {
if (value != null) {
TypeInfo info = null;
if (value instanceof XmlTypeInfoProvider) {
info = ((XmlTypeInfoProvider)value).getTypeInfo(name.getNamespaceURI(), name.getLocalPart(), typeMapper);
}
if (info == null) {
QName xmlType = typeMapper.getXmlType(value.getClass().getName());
if( xmlType == null && value.getClass().isArray()) {
xmlType = typeMapper.getXmlType( value.getClass().getComponentType().getName() );
}
for (Class classForType = value.getClass(); classForType != Object.class && xmlType == null;
classForType = classForType.getSuperclass()) {
xmlType = typeMapper.getXmlType(classForType.getName());
}
if (xmlType == null) {
//todo: throw right exception
throw new IOException("Unable to find xml type for :" + value.getClass().getName());
}
int max = value.getClass().isArray() ? -1 : 1;
if ( value.getClass().equals( byte[].class )) {
//special case for arrays we wish to treat as a single value
max = 1;
}
info = new TypeInfo(name.getNamespaceURI(), name.getLocalPart(),
xmlType.getNamespaceURI(), xmlType.getLocalPart(), 0, max, true);
}
typeMapper.writeObject(out, info, value, true);
}
}
typeMapper.writeFieldXsiType(false);
}
@Override
public void load(XmlInputStream in, TypeMapper typeMapper) throws IOException, ConnectionException {
loadStartTag(in, typeMapper);
loadAfterStartTag(in, typeMapper);
}
protected void loadStartTag(XmlInputStream in, TypeMapper typeMapper) {
in.consumePeeked();
name = new QName(in.getNamespace(), in.getName());
xmlType = typeMapper.getXsiType(in);
}
protected void loadAfterStartTag(XmlInputStream in, TypeMapper typeMapper) throws IOException, ConnectionException {
StringBuilder text = new StringBuilder();
boolean textFound = false;
while (true) {
int type = in.peek();
if (type == XmlInputStream.START_TAG) {
XmlObject child = extractChildElement(in, typeMapper);
child.load(in, typeMapper);
children.add(child);
} else if (type == XmlInputStream.TEXT) {
in.consumePeeked();
text.append(in.getText());
textFound = true;
} else if (type == XmlInputStream.END_TAG) {
in.consumePeeked();
String ns = in.getNamespace();
String n = in.getName();
if (name.getNamespaceURI().equals(ns) && name.getLocalPart().equals(n)) {
break;
}
} else {
throw new ConnectionException("unknown tag:" + type + " at " + in);
}
}
if (textFound) value = typeMapper.deserialize(text.toString(), xmlType);
}
private XmlObject extractChildElement(XmlInputStream in, TypeMapper typeMapper) throws ConnectionException {
XmlObject child;
QName xsiType = typeMapper.getXsiType(in);
if (xsiType == null) {
child = new XmlObject();
} else if (xsiType.getLocalPart().equals("QueryResult") && !in.getName().equals("QueryResult")) {
// In older API versions, some objects had their xsitype erroneously set to "QueryResult"
// even when they were not QueryResult objects. Since we have no information about their type
// we will default back to XmlObject.
child = new XmlObject();
} else {
Class childClass = typeMapper.getJavaType(xsiType);
if (childClass == null || !XMLizable.class.isAssignableFrom(childClass)) {
child = new XmlObject();
}
else {
XMLizable xmlizable;
try {
xmlizable = (XMLizable)childClass.newInstance();
if (xmlizable instanceof XmlObject) {
child = (XmlObject) xmlizable;
} else {
child = new XmlObjectWrapper(xmlizable);
}
} catch (InstantiationException e) {
throw new ConnectionException("Failed to create object", e);
} catch (IllegalAccessException e) {
throw new ConnectionException("Failed to create object", e);
}
}
}
return child;
}
protected void cloneFrom(XmlObject source) {
this.name = source.name;
this.xmlType = source.xmlType;
this.value = source.value;
this.defaultNamespace = source.defaultNamespace;
this.children = source.children;
}
}