| /* |
| * 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. |
| */ |
| |
| #include <axiom_navigator.h> |
| |
| static void |
| axiom_navigator_update_next_node(axiom_navigator_t *om_navigator, |
| const axutil_env_t *env); |
| |
| struct axiom_navigator |
| { |
| axiom_node_t *node; |
| |
| axis2_bool_t visited; |
| |
| axiom_node_t *next; |
| |
| axiom_node_t *root; |
| |
| axis2_bool_t backtracked; |
| |
| axis2_bool_t end; |
| |
| axis2_bool_t start; |
| |
| }; |
| |
| AXIS2_EXTERN axiom_navigator_t *AXIS2_CALL |
| axiom_navigator_create(const axutil_env_t *env, |
| axiom_node_t *om_node) |
| { |
| axiom_navigator_t *om_navigator = NULL; |
| AXIS2_ENV_CHECK(env, NULL); |
| AXIS2_PARAM_CHECK(env->error, om_node, NULL); |
| |
| om_navigator = |
| (axiom_navigator_t *)AXIS2_MALLOC(env->allocator, sizeof(axiom_navigator_t)); |
| if (!om_navigator) |
| { |
| AXIS2_ERROR_SET(env->error, AXIS2_ERROR_NO_MEMORY, AXIS2_FAILURE); |
| return NULL; |
| } |
| |
| om_navigator->node = NULL; |
| om_navigator->visited = AXIS2_FALSE; |
| om_navigator->next = NULL; |
| om_navigator->root = NULL; |
| om_navigator->end = AXIS2_FALSE; |
| om_navigator->start = AXIS2_TRUE; |
| om_navigator->backtracked = AXIS2_FALSE; |
| |
| om_navigator->next = om_node; |
| om_navigator->root = om_node; |
| |
| return om_navigator; |
| } |
| |
| |
| AXIS2_EXTERN void AXIS2_CALL |
| axiom_navigator_free(axiom_navigator_t *om_navigator, |
| const axutil_env_t *env) |
| { |
| AXIS2_ENV_CHECK(env , AXIS2_FAILURE); |
| AXIS2_FREE(env->allocator, om_navigator); |
| return; |
| } |
| |
| AXIS2_EXTERN axis2_bool_t AXIS2_CALL |
| axiom_navigator_is_navigable(axiom_navigator_t *om_navigator, |
| const axutil_env_t *env) |
| { |
| if (AXIS2_TRUE == om_navigator->end) |
| { |
| return AXIS2_FALSE; |
| } |
| else |
| { |
| if (om_navigator->next) |
| { |
| return AXIS2_TRUE; |
| } |
| } |
| return AXIS2_FALSE; |
| } |
| |
| AXIS2_EXTERN axis2_bool_t AXIS2_CALL |
| axiom_navigator_is_completed(axiom_navigator_t *om_navigator, |
| const axutil_env_t *env) |
| { |
| return om_navigator->end; |
| } |
| |
| |
| AXIS2_EXTERN axis2_bool_t AXIS2_CALL |
| axiom_navigator_visited(axiom_navigator_t *om_navigator, |
| const axutil_env_t *env) |
| { |
| return om_navigator->visited; |
| } |
| |
| AXIS2_EXTERN axiom_node_t *AXIS2_CALL |
| axiom_navigator_next(axiom_navigator_t *om_navigator, |
| const axutil_env_t *env) |
| { |
| AXIS2_ENV_CHECK(env, NULL); |
| |
| if (! om_navigator->next) |
| { |
| return NULL; |
| } |
| |
| om_navigator->node = om_navigator->next; |
| om_navigator->visited = om_navigator->backtracked; |
| om_navigator->backtracked = AXIS2_FALSE; |
| |
| axiom_navigator_update_next_node(om_navigator, env); |
| |
| /** set the starting and ending flags */ |
| if (om_navigator->root == om_navigator->next) |
| { |
| if (!(om_navigator->start)) |
| { |
| om_navigator->end = AXIS2_TRUE; |
| } |
| else |
| { |
| om_navigator->start = AXIS2_FALSE; |
| } |
| } |
| return om_navigator->node; |
| } |
| |
| /** this method encapsulate searching logic */ |
| static void |
| axiom_navigator_update_next_node(axiom_navigator_t *om_navigator, |
| const axutil_env_t *env) |
| { |
| if (!om_navigator) |
| { |
| return; |
| } |
| |
| if (!om_navigator->next) |
| { |
| return; |
| } |
| |
| if ((AXIOM_ELEMENT == axiom_node_get_node_type(om_navigator->next, env)) && |
| !(om_navigator->visited)) |
| { |
| if (axiom_node_get_first_child(om_navigator->next, env)) |
| { |
| om_navigator->next = axiom_node_get_first_child(om_navigator->next, env); |
| } |
| else if (AXIS2_TRUE == axiom_node_is_complete(om_navigator->next, env)) |
| { |
| om_navigator->backtracked = AXIS2_TRUE; |
| } |
| else |
| { |
| om_navigator->next = NULL; |
| } |
| } |
| else |
| { |
| axiom_node_t *parent = NULL; |
| axiom_node_t *next_sibling = NULL; |
| |
| next_sibling = axiom_node_get_next_sibling(om_navigator->next, env); |
| |
| parent = axiom_node_get_parent(om_navigator->next, env); |
| |
| if (next_sibling) |
| { |
| om_navigator->next = next_sibling; |
| } |
| else if ((parent) && axiom_node_is_complete(parent, env)) |
| { |
| om_navigator->next = parent; |
| om_navigator->backtracked = AXIS2_TRUE; |
| } |
| else |
| { |
| om_navigator->next = NULL; |
| } |
| } |
| } |
| |