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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
#ifndef AXIOM_XPATH_INTERNALS_ENGINE_H
#define AXIOM_XPATH_INTERNALS_ENGINE_H
#include "xpath_internals.h"
#ifdef __cplusplus
extern "C"
{
#endif
/**
* @defgroup axiom_xpath_engine engine
* @ingroup axiom_xpath
* @{
*/
/* Macros */
/** Set node->value to _value */
#define AXIOM_XPATH_CAST_SET_VALUE(_type, _value) { \
_type * _var; \
if(node->value \
&& node->type != AXIOM_XPATH_TYPE_NODE \
&& node->type != AXIOM_XPATH_TYPE_ATTRIBUTE \
&& node->type != AXIOM_XPATH_TYPE_NAMESPACE) \
{ AXIS2_FREE(context->env->allocator, node->value); } \
_var = AXIS2_MALLOC(context->env->allocator, sizeof(_type)); \
*_var = _value; \
node->value = (void *) _var; \
}
/* Functions */
/**
* Evaluate an XPath context, which containes a parsed expression
*
* @param context XPath context
* @return Result set
*/
axiom_xpath_result_t* axiom_xpath_run(axiom_xpath_context_t *context);
/**
* Finds the operator function for a given operation
*
* @param op Operation
* @return Pointer to the function which process the given operation
*/
axiom_xpath_operator_t axiom_xpath_get_operator(axiom_xpath_operation_t * op);
/**
* Get the iterotor for give axis
*
* @param axis XPath axis
* @return Pointer to the function which iterater through the given axis
*/
axiom_xpath_iterator_t axiom_xpath_get_iterator(axiom_xpath_axis_t axis);
/* Operators */
/**
* Select the start node depending on whether it is an absolute or relative location path
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack
*/
int axiom_xpath_start_node_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Add the context node or attribute to the results stack
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack
*/
int axiom_xpath_collect_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Process union operator
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack
*/
int axiom_xpath_union_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Perform or operation
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack; which is one
*/
int axiom_xpath_orexpr_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Perform and operation
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack; which is one
*/
int axiom_xpath_andexpr_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Perform equality test operation
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack; which is one
*/
int axiom_xpath_equalexpr_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Evaluate function call operation
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack; which is one
*/
int axiom_xpath_function_call_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Evaluate argument operation
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack; which is one
*/
int axiom_xpath_argument_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Process a path expression
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack
*/
int axiom_xpath_path_expression_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Process a number; push the value to the stack
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack; which is one
*/
int axiom_xpath_number_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Process a literal; push the string to the stack
*
* @param context XPath context
* @param op XPath operation
* @return Number of nodes added to the stack; which is one
*/
int axiom_xpath_literal_operator(axiom_xpath_context_t *context, axiom_xpath_operation_t * op);
/**
* Converts an XPath result to a boolean result
*
* @param node Result
* @param context XPath context
*/
void axiom_xpath_cast_boolean(axiom_xpath_result_node_t *node, axiom_xpath_context_t *context);
/**
* Converts an XPath result to a number
*
* @param node Result
* @param context XPath context
*/
void axiom_xpath_cast_number(axiom_xpath_result_node_t *node, axiom_xpath_context_t *context);
/**
* Converts an XPath result to a string
*
* @param node Result
* @param context XPath context
*/
void axiom_xpath_cast_string(axiom_xpath_result_node_t *node, axiom_xpath_context_t *context);
/* Convert a node set to boolean */
/**
* Convert a XPath node set to boolean
*
* @param node_set Node set
* @return AXIS2_TRUE if true; AXIS2_FALSE otherwise
*/
axis2_bool_t axiom_xpath_convert_to_boolean(axutil_array_list_t *node_set, axiom_xpath_context_t *context);
/**
* Test if two result nodes are equal
*
* @param node1 First node
* @param node2 Second node
* @param context XPath context
* @return AXIS2_TRUE if equal; AXIS2_FALSE otherwise
*/
axis2_bool_t axiom_xpath_compare_equal(axiom_xpath_result_node_t *node1, axiom_xpath_result_node_t *node2, axiom_xpath_context_t *context);
/**
* Test if the axiom node matches node test
*
* @param context XPath context
* @param node_test Node test
* @return AXIS2_TRUE if matches; AXIS2_FALSE otherwise
*/
axis2_bool_t axiom_xpath_node_test_match(axiom_xpath_context_t *context, axiom_xpath_node_test_t *node_test);
/**
* Evaluate if the predicate is true
*
* @param context XPath context
* @param n_nodes Number of results after evaluating the expression in the predicate
* @return AXIS2_TRUE if matches; AXIS2_FALSE otherwise
*/
axis2_bool_t axiom_xpath_evaluate_predicate_condition(axiom_xpath_context_t *context, int n_nodes);
/**
* Evaluate if the predicate(s) is true using axiom_xpath_evaluate_predicate_condition and executes the operation op_next
*
* @param context XPath context
* @param op_next The operation to be executed if all predicates are true
* @param op_predicate Reference to predicate
* @return Number of nodes added to the stack
*/
int axiom_xpath_evaluate_predicate(axiom_xpath_context_t *context, int op_next, int op_predicate);
/**
* Evaluate operation pointed by op
*
* @param context XPath context
* @param op The index of the operation in the operations list
* @return Number of nodes added to the stack
*/
int axiom_xpath_evaluate_operation(axiom_xpath_context_t *context, int op);
/** @} */
#ifdef __cplusplus
}
#endif
#endif
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