| /* |
| * 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_xpath.h> |
| #include "xpath_streaming.h" |
| #include "xpath_internals.h" |
| #include "xpath_internals_engine.h" |
| |
| axiom_xpath_streaming_t |
| axiom_xpath_streaming_check_operation( |
| const axutil_env_t *env, |
| axiom_xpath_expression_t* expr, |
| int op_p) |
| { |
| axiom_xpath_operation_t *op; |
| |
| if(op_p == AXIOM_XPATH_PARSE_END) |
| { |
| return AXIOM_XPATH_STREAMING_CONSTANT; |
| } |
| |
| op = AXIOM_XPATH_OPR_EXPR_GET(op_p); |
| |
| switch(op->opr) |
| { |
| case AXIOM_XPATH_OPERATION_CONTEXT_NODE: |
| case AXIOM_XPATH_OPERATION_ROOT_NODE: |
| return axiom_xpath_streaming_combine_dependent(AXIOM_XPATH_CHECK(op->op1), |
| AXIOM_XPATH_STREAMING_CONSTANT); |
| |
| case AXIOM_XPATH_OPERATION_STEP: |
| return axiom_xpath_streaming_combine_dependent(AXIOM_XPATH_CHECK(op->op1), |
| AXIOM_XPATH_CHECK(op->op2)); |
| |
| case AXIOM_XPATH_OPERATION_RESULT: |
| return AXIOM_XPATH_STREAMING_CONSTANT; |
| |
| case AXIOM_XPATH_OPERATION_UNION: |
| return axiom_xpath_streaming_combine_independent(AXIOM_XPATH_CHECK(op->op1), |
| AXIOM_XPATH_CHECK(op->op2)); |
| |
| case AXIOM_XPATH_OPERATION_EQUAL_EXPR: |
| return axiom_xpath_streaming_combine_independent(AXIOM_XPATH_CHECK(op->op1), |
| AXIOM_XPATH_CHECK(op->op2)); |
| |
| case AXIOM_XPATH_OPERATION_LITERAL: |
| return AXIOM_XPATH_STREAMING_CONSTANT; |
| |
| case AXIOM_XPATH_OPERATION_NUMBER: |
| return AXIOM_XPATH_STREAMING_CONSTANT; |
| |
| case AXIOM_XPATH_OPERATION_PATH_EXPRESSION: |
| return axiom_xpath_streaming_combine_dependent(AXIOM_XPATH_CHECK(op->op1), |
| AXIOM_XPATH_CHECK(op->op2)); |
| |
| case AXIOM_XPATH_OPERATION_NODE_TEST: |
| return axiom_xpath_streaming_check_node_test(env, expr, op); |
| |
| case AXIOM_XPATH_OPERATION_PREDICATE: |
| return axiom_xpath_streaming_check_predicate(env, expr, op_p); |
| |
| default: |
| AXIS2_LOG_ERROR(env->log, AXIS2_LOG_SI, "Unidentified operation."); |
| |
| return AXIOM_XPATH_STREAMING_NOT_SUPPORTED; |
| } |
| } |
| |
| axiom_xpath_streaming_t |
| axiom_xpath_streaming_check_predicate( |
| const axutil_env_t *env, |
| axiom_xpath_expression_t* expr, |
| int op_p) |
| { |
| axiom_xpath_operation_t *op; |
| |
| if(op_p == AXIOM_XPATH_PARSE_END) |
| { |
| return AXIOM_XPATH_STREAMING_CONSTANT; |
| } |
| |
| op = AXIOM_XPATH_OPR_EXPR_GET(op_p); |
| |
| return axiom_xpath_streaming_combine_dependent(AXIOM_XPATH_CHECK(op->op1), AXIOM_XPATH_CHECK( |
| op->op2)); |
| } |
| |
| axiom_xpath_streaming_t |
| axiom_xpath_streaming_check_node_test( |
| const axutil_env_t *env, |
| axiom_xpath_expression_t* expr, |
| axiom_xpath_operation_t *op) |
| { |
| axiom_xpath_axis_t axis = AXIOM_XPATH_AXIS_NONE; |
| axiom_xpath_streaming_t r; |
| |
| if(!op->par2) |
| { |
| AXIS2_LOG_ERROR(env->log, AXIS2_LOG_SI, "axis is NULL in the step operator"); |
| return AXIOM_XPATH_STREAMING_NOT_SUPPORTED; |
| } |
| |
| axis = *((axiom_xpath_axis_t *)op->par2); |
| |
| switch(axis) |
| { |
| case AXIOM_XPATH_AXIS_ATTRIBUTE: |
| case AXIOM_XPATH_AXIS_CHILD: |
| break; |
| |
| default: |
| return AXIOM_XPATH_STREAMING_NOT_SUPPORTED; |
| } |
| |
| r = axiom_xpath_streaming_check_predicate(env, expr, op->op1); |
| |
| if(r != AXIOM_XPATH_STREAMING_ATTRIBUTE && r != AXIOM_XPATH_STREAMING_CONSTANT) |
| { |
| return AXIOM_XPATH_STREAMING_NOT_SUPPORTED; |
| } |
| |
| if(axis == AXIOM_XPATH_AXIS_ATTRIBUTE) |
| { |
| return AXIOM_XPATH_STREAMING_ATTRIBUTE; |
| } |
| else |
| { |
| return AXIOM_XPATH_STREAMING_SUPPORTED; |
| } |
| } |
| |
| axiom_xpath_streaming_t |
| axiom_xpath_streaming_combine_dependent( |
| axiom_xpath_streaming_t r1, |
| axiom_xpath_streaming_t r2) |
| { |
| if(r1 == AXIOM_XPATH_STREAMING_NOT_SUPPORTED || r2 == AXIOM_XPATH_STREAMING_NOT_SUPPORTED) |
| { |
| return AXIOM_XPATH_STREAMING_NOT_SUPPORTED; |
| } |
| else if(r1 == AXIOM_XPATH_STREAMING_SUPPORTED || r2 == AXIOM_XPATH_STREAMING_SUPPORTED) |
| { |
| return AXIOM_XPATH_STREAMING_SUPPORTED; |
| } |
| else if(r1 == AXIOM_XPATH_STREAMING_ATTRIBUTE || r2 == AXIOM_XPATH_STREAMING_ATTRIBUTE) |
| { |
| return AXIOM_XPATH_STREAMING_ATTRIBUTE; |
| } |
| else |
| { |
| return AXIOM_XPATH_STREAMING_CONSTANT; |
| } |
| } |
| |
| axiom_xpath_streaming_t |
| axiom_xpath_streaming_combine_independent( |
| axiom_xpath_streaming_t r1, |
| axiom_xpath_streaming_t r2) |
| { |
| if(r1 == AXIOM_XPATH_STREAMING_NOT_SUPPORTED || r2 == AXIOM_XPATH_STREAMING_NOT_SUPPORTED) |
| { |
| return AXIOM_XPATH_STREAMING_NOT_SUPPORTED; |
| } |
| else if(r1 == AXIOM_XPATH_STREAMING_CONSTANT || r2 == AXIOM_XPATH_STREAMING_CONSTANT) |
| { |
| if(r1 == AXIOM_XPATH_STREAMING_SUPPORTED || r2 == AXIOM_XPATH_STREAMING_SUPPORTED) |
| { |
| return AXIOM_XPATH_STREAMING_SUPPORTED; |
| } |
| else if(r1 == AXIOM_XPATH_STREAMING_ATTRIBUTE || r2 == AXIOM_XPATH_STREAMING_ATTRIBUTE) |
| { |
| return AXIOM_XPATH_STREAMING_ATTRIBUTE; |
| } |
| else |
| { |
| return AXIOM_XPATH_STREAMING_CONSTANT; |
| } |
| } |
| else if(r1 == AXIOM_XPATH_STREAMING_ATTRIBUTE || r2 == AXIOM_XPATH_STREAMING_ATTRIBUTE) |
| { |
| if(r1 == AXIOM_XPATH_STREAMING_SUPPORTED || r2 == AXIOM_XPATH_STREAMING_SUPPORTED) |
| { |
| return AXIOM_XPATH_STREAMING_SUPPORTED; |
| } |
| else |
| { |
| return AXIOM_XPATH_STREAMING_ATTRIBUTE; |
| } |
| } |
| else |
| { |
| return AXIOM_XPATH_STREAMING_NOT_SUPPORTED; |
| } |
| } |
| |