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/*
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
*
* 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.switchyard.config.model;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.xml.namespace.QName;
import javax.xml.transform.Source;
import javax.xml.validation.Validator;
import org.switchyard.common.xml.XMLHelper;
import org.switchyard.config.Configuration;
import org.switchyard.config.ConfigurationPuller;
import org.switchyard.config.OutputKey;
/**
* An abstract representation of a Model, containing many helper methods, as well as default implementations for some of the defined methods..
*
* @author David Ward <[email protected]> (C) 2011 Red Hat Inc.
*/
public abstract class BaseModel implements Model {
private final Configuration _config;
private final Descriptor _desc;
private Model _parent;
protected BaseModel(String namespace, String name) {
this(XMLHelper.createQName(namespace, name));
}
protected BaseModel(QName qname) {
this(new ConfigurationPuller().pull(qname));
}
protected BaseModel(Configuration config) {
this(config, null);
}
protected BaseModel(Configuration config, Descriptor desc) {
_config = config;
_desc = desc != null ? desc : new Descriptor();
}
/**
* {@inheritDoc}
*/
@Override
public final Configuration getModelConfiguration() {
return _config;
}
/**
* {@inheritDoc}
*/
@Override
public final Descriptor getModelDescriptor() {
return _desc;
}
/**
* Gets the wrapped configuration namespace uri.
* @return Namespace uri of this model instance.
*/
protected final String getNamespaceURI() {
return getModelConfiguration().getQName().getNamespaceURI();
}
/**
* Gets the wrapped config's value.
* @return the value
*/
protected final String getModelValue() {
return getModelConfiguration().getValue();
}
/**
* Sets the wrapped config's value.
* @param value the value
* @return this model (useful for chaining)
*/
protected final Model setModelValue(String value) {
getModelConfiguration().setValue(value);
return this;
}
/**
* Gets the wrapped config's value for an attribute with a specified name.
* @param name the attribute name
* @return the attribute value
*/
protected final String getModelAttribute(String name) {
return getModelConfiguration().getAttribute(name);
}
/**
* Gets the wrapped config's value for an attribute with a specified qualified name.
* @param qname the attribute qualified name
* @return the attribute value
*/
protected final String getModelAttribute(QName qname) {
return getModelConfiguration().getAttribute(qname);
}
/**
* Gets the wrapped config's value for an attribute with a specified name, as a qualified name.
* @param name the attribute name
* @return the attribute value, as a qualified name
*/
protected final QName getModelAttributeAsQName(String name) {
return getModelConfiguration().getAttributeAsQName(name);
}
/**
* Gets the wrapped config's value for an attribute with a specified qualified name, as a qualified name.
* @param qname the attribute qualified name
* @return the attribute value, as a qualified name
*/
protected final QName getModelAttributeAsQName(QName qname) {
return getModelConfiguration().getAttributeAsQName(qname);
}
/**
* Sets the wrapped config's value for an attribute with a specified name.
* @param name the attribute name
* @param value the attribute value (null means "remove the attribute")
* @return this model (useful for chaining)
*/
protected final Model setModelAttribute(String name, String value) {
getModelConfiguration().setAttribute(name, value);
return this;
}
/**
* Sets the wrapped config's value for an attribute with a specified qualified name.
* @param qname the attribute qualified name
* @param value the attribute value (null means "remove the attribute")
* @return this model (useful for chaining)
*/
protected final Model setModelAttribute(QName qname, String value) {
getModelConfiguration().setAttribute(qname, value);
return this;
}
/**
* Sets the wrapped config's value for an attribute with a specified name, as a qualified name.
* @param name the attribute name
* @param value the attribute value, as a qualified name (null means "remove the attribute")
* @return this model (useful for chaining)
*/
protected final Model setModelAttributeAsQName(String name, QName value) {
getModelConfiguration().setAttributeAsQName(name, value);
return this;
}
/**
* Sets the wrapped config's value for an attribute with a specified qualified name, as a qualified name.
* @param qname the attribute qualified name
* @param value the attribute value, as a qualified name (null means "remove the attribute")
* @return this model (useful for chaining)
*/
protected final Model setModelAttributeAsQName(QName qname, QName value) {
getModelConfiguration().setAttributeAsQName(qname, value);
return this;
}
/**
* Whether or not this model has a parent model.
* @return true if a parent model exists
*/
protected final boolean hasParentModel() {
return getModelParent() != null;
}
/**
* {@inheritDoc}
*/
@Override
public final Model getModelParent() {
if (_parent == null) {
Configuration parent_config = _config.getParent();
if (parent_config != null) {
_parent = readModel(parent_config);
}
}
return _parent;
}
/**
* {@inheritDoc}
*/
@Override
public final Model getModelRoot() {
Model root = this;
while (root.getModelParent() != null) {
root = root.getModelParent();
}
return root;
}
/**
* {@inheritDoc}
*/
@Override
public String getModelRootNamespace() {
//return getModelRoot().getModelConfiguration().getQName().getNamespaceURI();
// the line below is faster than the line above, as it won't invoke readModel
return _config.getRootNamespace();
}
/**
* {@inheritDoc}
*/
@Override
public final List getModelChildren() {
List child_models = new ArrayList();
List child_configs =_config.getChildren();
if (child_configs != null) {
for (Configuration child_config : child_configs) {
if (child_config != null) {
Model child_model = readModel(child_config);
if (child_model != null) {
child_models.add(child_model);
}
}
}
}
return child_models;
}
/**
* {@inheritDoc}
*/
@Override
public Validation validateModel() {
Validator validator = _desc.getValidator(_config);
if (validator != null) {
Source source = _config.getSource();
try {
validator.validate(source);
} catch (Throwable t) {
return new Validation(getClass(), t);
}
} else {
return new Validation(getClass(), false, "validator == null");
}
return new Validation(getClass(), true);
}
/**
* {@inheritDoc}
*/
@Override
public Model assertModelValid() {
validateModel().assertValid();
return this;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isModelValid() {
return validateModel().isValid();
}
/**
* Gets the first child model with the specified name.
* @param name name of the child model
* @return the first child model with the specified name
*/
protected final Model getFirstChildModel(String name) {
Configuration child_config = _config.getFirstChild(name);
if (child_config != null) {
return readModel(child_config);
}
return null;
}
/**
* Gets the first child model with a specified name that starts with the specified prefix.
* @param name the prefix to match against
* @return the first child model with the specified prefix
*/
protected final Model getFirstChildModelStartsWith(String name) {
Configuration child_config = _config.getFirstChildStartsWith(name);
if (child_config != null) {
return readModel(child_config);
}
return null;
}
/**
* Reads (constructs) a Model based on the specified Configuration.
* @param config the Configuration
* @return the new Model
*/
protected final synchronized Model readModel(Configuration config) {
if (config != null) {
Marshaller marsh = _desc.getMarshaller(config);
if (marsh != null) {
return marsh.read(config);
}
}
return null;
}
/**
* Adds a child model to this model.
* @param child the child to add
* @return this model (useful for chaining)
*/
protected final Model addChildModel(Model child) {
if (child != null) {
_config.addChild(child.getModelConfiguration());
}
return this;
}
/**
* First removes all child models with a wrapped Configuration which has a matching qualified name, then adds the single, specified child model.
* @param child the child model to add
* @return this model (useful for chaining)
*/
protected final Model setChildModel(Model child) {
if (child != null) {
Configuration child_config = child.getModelConfiguration();
_config.removeChildren(child_config.getQName());
_config.addChild(child_config);
}
return this;
}
/**
* Gets the names of the children (based on their wrapped Configurations) used to order them by.
* @return the child model's names (based on their wrapped Configurations) used for ordering
*/
protected final String[] getModelChildrenOrder() {
return _config.getChildrenOrder();
}
/**
* Sets the names of the children (based on their wrapped Configurations) used to order them by.
* @param childrenOrder the child model names (based on their wrapped Configurations) used for ordering
* @return this model (useful for chaining)
*/
protected Model setModelChildrenOrder(String... childrenOrder) {
String[] existingOrder = getModelChildrenOrder();
if (existingOrder != null && existingOrder.length > 0) {
List orderList = new ArrayList();
orderList.addAll(Arrays.asList(existingOrder));
orderList.addAll(Arrays.asList(childrenOrder));
_config.setChildrenOrder(orderList.toArray(new String[orderList.size()]));
} else {
_config.setChildrenOrder(childrenOrder);
}
return this;
}
/**
* {@inheritDoc}
*/
@Override
public Model orderModelChildren() {
primeModelChildren();
getModelConfiguration().orderChildren();
return this;
}
/**
* Recursively iterates over the children, which will force instantiation of a Model for every child Configuration.
* @return this model (useful for chaining)
*/
protected final Model primeModelChildren() {
primeModelChildren(this);
return this;
}
private final void primeModelChildren(Model model) {
for (Model child : model.getModelChildren()) {
primeModelChildren(child);
}
}
/**
* {@inheritDoc}
*/
@Override
public void write(OutputStream out, OutputKey... keys) throws IOException {
getModelConfiguration().write(out, keys);
}
/**
* {@inheritDoc}
*/
@Override
public void write(Writer writer, OutputKey... keys) throws IOException {
getModelConfiguration().write(writer, keys);
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return _config.toString();
}
/**
* {@inheritDoc}
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((_config == null) ? 0 : _config.hashCode());
result = prime * result + ((_desc == null) ? 0 : _desc.hashCode());
return result;
}
/**
* {@inheritDoc}
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
BaseModel other = (BaseModel)obj;
if (_config == null) {
if (other._config != null) {
return false;
}
} else if (!_config.equals(other._config)) {
return false;
}
if (_desc == null) {
if (other._desc != null) {
return false;
}
} else if (!_desc.equals(other._desc)) {
return false;
}
return true;
}
}
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