/*
 *   Copyright 2003-2004 The Apache Software Foundation.
// (c) Copyright IBM Corp. 2004, 2005 All Rights Reserved
 *
 *   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.
 */

/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
/* NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE   */
/* ----------------------------------------------------------------   */
/* CHANGES TO hpp HEADER FILE MAY NEED TO BE PROPAGATED TO THE        */
/* C-EQUIVALENT HEADER FILE IN SUPPORT OF THE C-BINDING INTERFACES.   */
/* ----------------------------------------------------------------   */
/* NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE   */
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */


#if !defined(_IHEADERBLOCK_H____OF_AXIS_INCLUDED_)
#define _IHEADERBLOCK_H____OF_AXIS_INCLUDED_

#include <axis/BasicNode.hpp>
#include <axis/SoapEnvVersions.hpp>
#include <axis/IAttribute.hpp>
#include <axis/INamespace.hpp>

/**
 * @file IHeaderBlock.hpp
 */

AXIS_CPP_NAMESPACE_START

/**
 * @enum HEADER_BLOCK_STD_ATTR_TYPE
 * Enumeration of standard header block attributes.
 */
typedef enum 
{   
    /**
     * (SOAP 1.2 only) The role attribute set as next.
     * The value will be set as "http://www.w3.org/2003/05/soap-envelope/role/next"
     */
    ROLE_NEXT=1,
    
    /**
     * (SOAP 1.2 only) The role attribute set as none.
     * The value will be set as "http://www.w3.org/2003/05/soap-envelope/role/none"
     */
    ROLE_NONE=2,
    
    /**
     * (SOAP 1.2 only) The role attribute set as ultimateReceiver
     * The value will be set as "http://www.w3.org/2003/05/soap-envelope/role/ultimateReceiver"
     */
    ROLE_ULTIMATE_RECEIVER=3,
    
    /**
     * (SOAP 1.1 only) The actor attribute
     */
    ACTOR=4,

    /**
     * The mustUnderstand attribute set as true.
     * For SOAP 1.1 - the value will be set as "1".
     * For SOAP 1.2 - the value will be set as "true".
     */
    MUST_UNDERSTAND_TRUE= 5,
    /**
     * The mustUnderstand attribute set as false.
     * For SOAP 1.1 - the value will be set as "0".
     * For SOAP 1.2 - the value will be set as "false".
     */
    MUST_UNDERSTAND_FALSE=6
} HEADER_BLOCK_STD_ATTR_TYPE;


/**
 *  @class IHeaderBlock
 *  @brief interface for the IHeaderBlock class.
 */


class IHeaderBlock
{
public:

    /** 
    * Creates a Attribute and adds it to this Header Block as a namespace. 
    * 
    * @param prefix The prefix of the attribute. 
    * @param uri The namespace uri of the attribute. 
    * 
    * @return A pointer to the created Attribute will be returned. 
    */ 
    virtual INamespace* createNamespaceDecl(const AxisChar *prefix, 
                                            const AxisChar *uri)=0; 

    /**
     * Retyrbs the first child element of this Header Block.
     * 
     * @return A pointer to the first child element of this Header Block.
     */
    virtual BasicNode* getFirstChild()=0;
    /**
     * Returns the number of child elements of this HeaderBlock.
     *
     * @return The number of child elements of this HeaderBlock.
     */
    virtual int getNoOfChildren()=0;

    /**
      * Creates a child node depending on the given node type. i.e:
      * if node type == CHARACTER_NODE then it creates a Character Element.
      * if node type == ELEMENT_NODE then it creates a Complex Element.
      * This method doesn't add the created child to this Header Block. If the
      * user needs to add this created child then he has to use the
      * addChild(BasicNode *pBasicNode) method after creating the child.
      * If the node to be created is a CHARACTER_NODE then only the parameter
      * pachValue will be usefull and for others you can provide NULL.
      * If the node to be created is a ELEMENT_NODE then the parameters 
      * pachLocalName, pachPrefix, pachUri will be needed to provide and you
      * can provide NULL for the pachValue.
      *
      * @param eNODE_TYPE The node type to be created, i.e CHARACTER_NODE or
      * ELEMENT_NODE.
      * @param pachLocalName The local name of the child node. A CHARACTER_NODE
      * will ignore this.
      * @param pachPrefix The prefix of the child node. A CHARACTER_NODE
      * will ignore this.
      * @param pachUri The namespace uri of the child node. A CHARACTER_NODE
      * will ignore this.
      * @param pachValue The value of the child node. A ELEMENT_NODE
      * will ignore this.
      * 
      * @return The child node created will be returned if the creation is
      * successfull. If the creation is unsccessfull it will return NULL.
      */
    virtual BasicNode* createChild(NODE_TYPE eNODE_TYPE,  
                                   AxisChar *pachLocalName, 
                                   AxisChar *pachPrefix, 
                                   AxisChar *pachUri,
                                   AxisChar* pachValue) = 0;

    /**
     * Creates a child node depending on the given type. If the type is 
     *  CHARACTER_NODE a CharacterElement is created. If the type is 
     *  ELEMENT_NODE a ComplexElement is created. After creating the child it
     *  will be added as a immediate child to the header block.
     *  It is important to note that if the type is CHARACTER_NODE only the
     *  NODE_TYPE and value (pachValue) parameters will be usefull.If the type
     *  is ELEMENT_NODE the parameters NODE_TYPE, pachLocalName, pachPrefix, 
     *  pachUri will be usefull.
     *
     * @param eNODE_TYPE The type of the child to be created, it should be either 
     *  CHARACTER_NODE for CharacterElements or ELEMENT_NODE for 
     *  ComplexElements.
     * @param pachLocalName The local name of the complex element to be created.
     * @param pachPrefix The prefix of the complex element to be created.
     * @param pachUri The namespace uri of the complex element to be created.
     * @param pachValue The value of the character element to be created.
     *
     * @return The child node created will be returned if the creation is
     *  successfull. If the creation is unsccessfull it will return NULL.
     */    
    virtual BasicNode* createImmediateChild(NODE_TYPE eNODE_TYPE, 
                                            AxisChar *pachLocalName, 
                                            AxisChar *pachPrefix, 
                                            AxisChar *pachUri, 
                                            AxisChar* pachValue) = 0;

    /**
     * A user can use this method to create a standard HeaderBlock attribute. 
     * The types of HEADER_BLOCK_STD_ATTR_TYPE are:
     * ROLE_NEXT : To create the role attribute to point to next.
     * ROLE_NONE : To create the role attribute to point to none.
     * ROLE_ULTIMATE_RECEIVER : To create the role attribute to point to 
     * ultimate receiver.
     * ACTOR : To create the actor attribute to point to next.
     * MUST_UNDERSTAND_TRUE : To create the mustUnderstand attribute to 
     * point to true.
     * MUST_UNDERSTAND_FALSE : To create the mustUnderstand attribute to 
     * point to false.
     * To use ROLE_NEXT, 
     * ROLE_NONE, ROLE_ULTIMATE_RECEIVER, MUST_UNDERSTAND_TRUE,
     * MUST_UNDERSTAND_FALSE the user has to pass SOAP_VER_1_2 as the 
     * SOAP_VERSION.
     * To use ACTOR, MUST_UNDERSTAND_TRUE, MUST_UNDERSTAND_FALSE the user has 
     * to pass SOAP_VER_1_1 as the SOAP_VERSION.
     * NOTE: No checking is done to see if the attributs being created on the header are correct for SOAP.
     * e.g. if two MUST_UNDERSTAND_TRUE headers are created then the SOAP message is invalid but it will still
     * get sent across to the server. In such instances we expect most servers to respond with a server fault.
     *
     * @param eStdAttrType The standard attribute to be created.
     * The current values that can be passes are: ROLE_NEXT, ROLE_NONE, 
     * ROLE_ULTIMATE_RECEIVER, ACTOR, MUST_UNDERSTAND_TRUE,
     * MUST_UNDERSTAND_FALSE.
     * @param eSOAP_VERSION The related soap version. 
     * The vallues which could be
     * passes are SOAP_VER_1_1 and SOAP_VER_1_2.
     *
     * @return A pointer to the created standard Attribute will be returned.
     */
    virtual IAttribute* createStdAttribute(HEADER_BLOCK_STD_ATTR_TYPE eStdAttrType, 
                                           SOAP_VERSION eSOAP_VERSION) =0;

    /**
      * Creates a Attribute and adds it to this Header Block. 
      * NOTE: No checking is done to see if this attribute creation applies to the xsd rules. 
      * We expect that the server side will fail.
      * e.g. If creating more than one attribute with the same name the outcome is undefined
      * 
      * @param localname The local name of the attribute. (mandatory)
      * @param prefix The prefix of the attribute. (optional)
      * @param uri The namespace uri of the attribute. (optional)
      * @param value The value of the attribute. (optional)
      *
      * @return A pointer to the created Attribute will be returned.
      */
    virtual IAttribute* createAttribute(const AxisChar* localname, 
                                        const AxisChar* prefix, 
                                        const AxisChar* uri, 
                                        const AxisChar* value) = 0;

    /**
      * Creates a Attribute and adds it to this Header Block.
      * NOTE: No checking is done to see if this attribute creation applies to the xsd rules. 
      * We expect that the server side will fail.
      * e.g. If creating more than one attribute with the same name the outcome is undefined
      *
      * @param localname The local name of the attribute. (mandatory)
      * @param prefix The prefix of the attribute. (optional)
      * @param value The value of the attribute. (optional)
      *
      * @return A pointer to the created Attribute will be returned.
      */
    virtual IAttribute* createAttribute(const AxisChar *localname, 
                                        const AxisChar *prefix, 
                                        const AxisChar *value) = 0;
     /**
      * Gets an Attribute from the HeaderBlock.
      *
      * @param localname The local name of the attribute.
      * @param prefix The prefix of the attribute.
      *
      * @return the value of the attribute is returned.
      */
     virtual const AxisChar* getAttributeValue(const AxisChar* localname,
                                               const AxisChar* prefix) = 0;

    /**
     * Gets and Attribute URI from the Header Block.
     * 
     * @param localname The local name of the attribute.
     * @param prefix The prefix of the attribute.
     * 
     * @return the uri of the attribute is returned.
     */ 
     virtual const AxisChar* getAttributeUri( const AxisChar * localname,
                                              const AxisChar* prefix) = 0;

    /**
     * Creates a child node depending on the given type. If the type is 
     * CHARACTER_NODE a CharacterElement is created. If the type is 
     * ELEMENT_NODE a ComplexElement is created. After creating the child it
     * will be added as a immediate child to the header block.
     *
     * @param eNODE_TYPE The type of the child to be created, it should be either 
     * CHARACTER_NODE for CharacterElements or ELEMENT_NODE for 
     * ComplexElements.
     * @return The child node created will be returned if the creation is
     * successfull. If the creation is unsccessfull it will return NULL.
     */
    virtual BasicNode* createImmediateChild(NODE_TYPE eNODE_TYPE) = 0;

    /**
     * Creates a child node depending on the given type. If the type is 
     * CHARACTER_NODE a CharacterElement is created. If the type is 
     * ELEMENT_NODE a ComplexElement is created. After creating the child it
     * will not be added as a child to the header block. The user has to add
     * the created child to the appropriate locaion as his wish.
     *
     * @param eNODE_TYPE The type of the child to be created, 
     * it should be either 
     * CHARACTER_NODE for CharacterElements or ELEMENT_NODE for 
     * ComplexElements.
     * @return The child node created will be returned if the creation is
     * successfull. If the creation is unsccessfull it will return NULL.
     */
    virtual BasicNode* createChild(NODE_TYPE eNODE_TYPE)=0;

    /**
     * Returns the last child element. The user has to check whether the
     * method return NULL before proceding.
     *
     * @return The last child element is returned if it exists. 
     * If the child element doesn't exsist this method returns NULL.
     */
    virtual BasicNode* getLastChild() = 0;

    /**
     * Returns the child element at the given postion. 
     * The user has to check whether the method return NULL before proceding.
     *
     * @param iChildPosition The positon of the required child element.
     * @return The required child element is returned if it exists. 
     * If the child element doesn't exsist this method returns NULL.
     */
    virtual BasicNode* getChild(int iChildPosition) = 0;

    /**
      * Adds a child node to the Header Block.
      *
      * @param pBasicNode The child node pointer which is to be added
      * NOTE: This cannot be a pointer to a child that has already been added> If you want to add the same data twice then create a new basic node.
      * @return AXIS_SUCCESS to indicate successfull operation.AXIS_FAIL otherwise
      */
    virtual int addChild(BasicNode* pBasicNode)=0;

    /**
      * Sets the local name of this Header Block.
      *
      * @param localname The localname to set in.
      * @return AXIS_SUCCESS if successful AXIS_FAIL otherwise
      */
    virtual int setLocalName(const AxisChar* localname)=0;
    
    /**
      * Gets the local name of this Header Block.
      *
      */
    virtual const AxisChar * getLocalName()=0;

    /**
      * Sets the namespace uri of this Header Block.
      *
      * @param uri The namespace uri to set in. IF NULL is passed in then URI is set to ""
      * @return AXIS_SUCCESS if successful AXIS_FAIL otherwise
      * 
      */
    virtual int setURI(const AxisChar* uri)=0;

    /**
      * Sets the prefix of this Header Block.
      *
      * @param prefix The prefix to set in.IF NULL is passed in the prefix is set to ""
      * @return AXIS_SUCCESS if successful AXIS_FAIL otherwise
      */
    virtual int setPrefix(const AxisChar* prefix)=0;

#ifdef UNIT_TESTING_ON
    /**
      * Initialized the Header Block for testing.
      */
    virtual int initializeForTesting() = 0;
#endif
    
    /**
     * Default constructor
     */
    IHeaderBlock(){/*empty body as there are no member variable*/};

    /**
     * Copy constructor
     * 
     * @param rCopy IHeaderBlock to be copied.
     */
    IHeaderBlock(const IHeaderBlock& rCopy){/*empty body as there are no member variable*/};

    /**
      * Creates and returns a clone of this Header Block.
      *
      * @return A clone of this Header Block.
      */
    virtual IHeaderBlock* clone() = 0;

    /**
      * The Destructor.
      */
    virtual ~IHeaderBlock() {};
};

AXIS_CPP_NAMESPACE_END

#endif