<?xml version="1.0" encoding="UTF-8"?>
<!--
 - 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.
 -->
<schema xmlns="http://www.w3.org/2001/XMLSchema"
        targetNamespace="urn:switchyard-config:switchyard:1.0"
        xmlns:swyd="urn:switchyard-config:switchyard:1.0"
        xmlns:sca="http://docs.oasis-open.org/ns/opencsa/sca/200912"
        elementFormDefault="qualified">

    <import namespace="http://docs.oasis-open.org/ns/opencsa/sca/200912"/>

    <element name="switchyard" type="swyd:SwitchYardType"/>
    <complexType name="SwitchYardType">
        <sequence>
           <element ref="sca:composite" minOccurs="0" maxOccurs="1"/>
           <element ref="swyd:transforms" minOccurs="0" maxOccurs="1"/>
           <element ref="swyd:validates" minOccurs="0" maxOccurs="1"/>
           <element ref="swyd:domain" minOccurs="0" maxOccurs="1"/>
           <element ref="swyd:artifacts" minOccurs="0" maxOccurs="1"/>
        </sequence>
        <attribute name="name" type="string" use="optional"/>
        <attribute name="targetNamespace" type="string" use="optional"/>
    </complexType>

    <element name="binding.switchyard" type="swyd:SwitchYardBindingType" substitutionGroup="sca:binding" abstract="true"/>
    <complexType name="SwitchYardBindingType" abstract="true">
        <complexContent>
            <extension base="sca:Binding"/>
        </complexContent>
    </complexType>

    <complexType name="ContextMapperType">
        <attribute name="class" type="string" use="optional"/>
        <attribute name="includes" type="string" use="optional"/>
        <attribute name="excludes" type="string" use="optional"/>
        <attribute name="includeNamespaces" type="string" use="optional"/>
        <attribute name="excludeNamespaces" type="string" use="optional"/>
    </complexType>

    <complexType name="MessageComposerType">
        <attribute name="class" type="string" use="optional"/>
    </complexType>

    <element name="operationSelector.switchyard" type="swyd:SwitchYardOperationSelectorType" substitutionGroup="sca:operationSelector" abstract="true"/>
    <complexType name="SwitchYardOperationSelectorType" abstract="true">
        <complexContent>
            <extension base="sca:OperationSelectorType"/>
        </complexContent>
    </complexType>
    
    <element name="operationSelector" type="swyd:StaticOperationSelectorType" substitutionGroup="swyd:operationSelector.switchyard"/>
    <complexType name="StaticOperationSelectorType">
        <annotation>
            <documentation xml:lang="en">
                Static Operation Selector Configuration.
            </documentation>
        </annotation>
        <complexContent>
            <extension base="swyd:SwitchYardOperationSelectorType">
                <attribute name="operationName" type="string" use="required">
                    <annotation>
                        <documentation xml:lang="en">
                            Operation name.
                        </documentation>
                    </annotation>
                </attribute>
            </extension>
        </complexContent>
    </complexType>

    <element name="operationSelector.xpath" type="swyd:XPathOperationSelectorType" substitutionGroup="swyd:operationSelector.switchyard"/>
    <complexType name="XPathOperationSelectorType">
        <annotation>
            <documentation xml:lang="en">
                XPath Operation Selector Configuration.
            </documentation>
        </annotation>
        <complexContent>
            <extension base="swyd:SwitchYardOperationSelectorType">
                <attribute name="expression" type="string" use="required">
                    <annotation>
                        <documentation xml:lang="en">
                            XPath expression.
                        </documentation>
                    </annotation>
                </attribute>
            </extension>
        </complexContent>
    </complexType>

    <element name="operationSelector.regex" type="swyd:RegexOperationSelectorType" substitutionGroup="swyd:operationSelector.switchyard"/>
    <complexType name="RegexOperationSelectorType">
        <annotation>
            <documentation xml:lang="en">
                XPath Operation Selector Configuration.
            </documentation>
        </annotation>
        <complexContent>
            <extension base="swyd:SwitchYardOperationSelectorType">
                <attribute name="expression" type="string" use="required">
                    <annotation>
                        <documentation xml:lang="en">
                            Regex expression.
                        </documentation>
                    </annotation>
                </attribute>
            </extension>
        </complexContent>
    </complexType>

    <element name="operationSelector.java" type="swyd:JavaOperationSelectorType" substitutionGroup="swyd:operationSelector.switchyard"/>
    <complexType name="JavaOperationSelectorType">
        <annotation>
            <documentation xml:lang="en">
                Java Operation Selector Configuration.
            </documentation>
        </annotation>
        <complexContent>
            <extension base="swyd:SwitchYardOperationSelectorType">
                <attribute name="class" type="string" use="required">
                    <annotation>
                        <documentation xml:lang="en">
                            operation selector implementation class name.
                        </documentation>
                    </annotation>
                </attribute>
            </extension>
        </complexContent>
    </complexType>

    <element name="transforms" type="swyd:TransformsType"/>
    <complexType name="TransformsType">
        <sequence>
            <element ref="swyd:transform" minOccurs="0" maxOccurs="unbounded"/>
        </sequence>
    </complexType>

    <element name="transform" type="swyd:TransformType" abstract="true"/>
    <complexType name="TransformType" abstract="true">
        <attribute name="from" type="string" use="required"/>
        <attribute name="to" type="string" use="required"/>
    </complexType>

    <element name="validates" type="swyd:ValidatesType"/>
    <complexType name="ValidatesType">
        <sequence>
            <element ref="swyd:validate" minOccurs="0" maxOccurs="unbounded"/>
        </sequence>
    </complexType>

    <element name="validate" type="swyd:ValidateType" abstract="true"/>
    <complexType name="ValidateType" abstract="true">
        <attribute name="name" type="string" use="required"/>
    </complexType>

    <element name="domain" type="swyd:DomainType"/>
    <complexType name="DomainType">
        <sequence>
            <element ref="swyd:transforms" minOccurs="0" maxOccurs="1"/>
            <element ref="swyd:validates" minOccurs="0" maxOccurs="1"/>
            <element ref="swyd:properties" minOccurs="0" maxOccurs="1"/>
            <element ref="swyd:securities" minOccurs="0" maxOccurs="1"/>
        </sequence>
        <attribute name="name" type="string" use="optional"/>
    </complexType>

    <element name="properties" type="swyd:PropertiesType"/>
    <complexType name="PropertiesType">
        <sequence>
            <element ref="swyd:property" minOccurs="0" maxOccurs="unbounded"/>
        </sequence>
    </complexType>

    <element name="property" type="swyd:PropertyType"/>
    <complexType name="PropertyType">
        <attribute name="name" type="string" use="required"/>
        <attribute name="value" type="string" use="required"/>
    </complexType>

    <element name="resource" type="swyd:ResourceType"/>
    <complexType name="ResourceType">
        <attribute name="location" type="string" use="required"/>
        <attribute name="type" type="NCName" use="required"/>
    </complexType>

    <element name="artifacts" type="swyd:ArtifactsType"/>
    <complexType name="ArtifactsType">
        <sequence>
            <element ref="swyd:artifact" minOccurs="0" maxOccurs="unbounded"/>
        </sequence>
    </complexType>

    <element name="artifact" type="swyd:ArtifactType"/>
    <complexType name="ArtifactType">
        <attribute name="name" type="string" use="required"/>
        <attribute name="url" type="string" use="required"/>
    </complexType>

    <element name="securities" type="swyd:SecuritiesType"/>
    <complexType name="SecuritiesType">
        <sequence>
            <element ref="swyd:security" minOccurs="0" maxOccurs="unbounded"/>
        </sequence>
    </complexType>

    <element name="security" type="swyd:SecurityType"/>
    <complexType name="SecurityType">
        <sequence>
            <element ref="swyd:properties" minOccurs="0" maxOccurs="1"/>
        </sequence>
        <attribute name="callbackHandler" type="string" use="optional"/>
        <attribute name="name" type="string" use="optional"/>
        <attribute name="rolesAllowed" type="string" use="optional"/>
        <attribute name="runAs" type="string" use="optional"/>
        <attribute name="securityDomain" type="string" use="optional"/>
    </complexType>

    <element name="interface.esb" type="swyd:EsbInterface" substitutionGroup="sca:interface"/>
    <complexType name="EsbInterface">
        <complexContent>
            <extension base="sca:Interface">
                <attribute name="inputType" type="string" use="optional"/>
                <attribute name="outputType" type="string" use="optional"/>
                <attribute name="faultType" type="string" use="optional"/>
            </extension>
        </complexContent>
    </complexType>
    
    <element name="throttling" type="swyd:ThrottlingType"/>
    <complexType name="ThrottlingType">
        <annotation>
            <documentation xml:lang="en">
                SCA extension for configuring throttling details.
            </documentation>
        </annotation>
        <attribute name="timePeriod" type="swyd:propLong" use="optional" default="1000">
          <annotation>
              <documentation xml:lang="en">
                  The time period in milliseconds over which requests are counted.  Defaults to 1000 (1 second).
              </documentation>
          </annotation>
        </attribute>
        <attribute name="maxRequests" type="swyd:propInteger" use="required">
          <annotation>
              <documentation xml:lang="en">
                  The maximum number of requests which can be processed during the specified timePeriod.
              </documentation>
          </annotation>
        </attribute>
    </complexType>
    
    <!-- binding.sca extensions -->
    <attribute name="target" type="string"/>
    <attribute name="targetNamespace" type="string"/>
    <attribute name="clustered" type="boolean"/>
    <attribute name="loadBalance" type="string"/>
    
    <!-- service and reference extensions -->
    <attribute name="security" type="string"/>
    
    <!-- Support for using ${property} values in non-string content -->
    <simpleType name="propInteger">
        <union memberTypes="integer swyd:propertyValue"/>
    </simpleType>
    
    <simpleType name="propLong">
        <union memberTypes="long swyd:propertyValue"/>
    </simpleType>
    
    <simpleType name="propBoolean">
        <union memberTypes="boolean swyd:propertyValue"/>
    </simpleType>
    
    <simpleType name="propertyValue">
        <restriction base="string">
            <pattern value="\$\{([a-zA-Z0-9])*(:([a-zA-Z0-9])*)?\}"/>
        </restriction>
    </simpleType>
   
</schema>
