diff options
author | 2021-05-20 16:44:21 +0100 | |
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committer | 2021-06-01 10:12:55 +0100 | |
commit | c37678a3eb62685d32a1581729e2a4e26002bffc (patch) | |
tree | 1901f7e3517ae339f99905f7ffc0021553874842 /cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java | |
parent | 9de3b68373dd8554e64f34bb3093403521f8759f (diff) |
Introducing Antlr4 for cpsPath parsing
-created new module for cpPathParser
-added antlr rule for cpsPathWithSingleLeafCondition
-added antlr rule for cpsPathWithDescendant (and with leaf conditions)
-added antlr rule for ancestor axis
-added unit test (copied from existing CpsPathQuerySpec)
-udpated cps-ri to use new cpPathQuery from parser module
-'imported' lexer rules from publix xPath grammar
-Re-used existing CpsPathException but conversion happens in cps-ri to prevent additional dependency in cps-path-parser module
Issue-ID: CPS-376
Change-Id: I2c5df98969402cbf69f6573c52705879450ce606
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Diffstat (limited to 'cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java')
-rw-r--r-- | cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java new file mode 100644 index 000000000..83e076d53 --- /dev/null +++ b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java @@ -0,0 +1,107 @@ +package org.onap.cps.cpspath.parser; +/* + * ============LICENSE_START======================================================= + * Copyright (C) 2021 Nordix Foundation + * ================================================================================ + * 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. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + +import java.util.HashMap; +import java.util.Map; +import org.onap.cps.cpspath.parser.antlr4.CpsPathBaseListener; +import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.AncestorAxisContext; +import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.CpsPathWithDescendantAndLeafConditionsContext; +import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.CpsPathWithDescendantContext; +import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.CpsPathWithSingleLeafConditionContext; +import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.LeafConditionContext; +import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.MultipleValueConditionsContext; +import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.PrefixContext; +import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.SingleValueConditionContext; + +public class CpsPathBuilder extends CpsPathBaseListener { + + final CpsPathQuery cpsPathQuery = new CpsPathQuery(); + + final Map<String, Object> leavesData = new HashMap<>(); + + @Override + public void exitPrefix(final PrefixContext ctx) { + cpsPathQuery.setXpathPrefix(ctx.getText()); + } + + @Override + public void exitLeafCondition(final LeafConditionContext ctx) { + Object comparisonValue = null; + if (ctx.IntegerLiteral() != null) { + comparisonValue = Integer.valueOf(ctx.IntegerLiteral().getText()); + } + if (ctx.StringLiteral() != null) { + comparisonValue = stripFirstAndLastCharacter(ctx.StringLiteral().getText()); + } else if (comparisonValue == null) { + throw new IllegalStateException("Unsupported comparison value encountered in expression" + ctx.getText()); + } + leavesData.put(ctx.leafName().getText(), comparisonValue); + } + + @Override + public void enterSingleValueCondition(final SingleValueConditionContext ctx) { + leavesData.clear(); + } + + @Override + public void enterMultipleValueConditions(final MultipleValueConditionsContext ctx) { + leavesData.clear(); + } + + @Override + public void exitSingleValueCondition(final SingleValueConditionContext ctx) { + final String leafName = ctx.leafCondition().leafName().getText(); + cpsPathQuery.setLeafName(leafName); + cpsPathQuery.setLeafValue(leavesData.get(leafName)); + } + + @Override + public void exitCpsPathWithSingleLeafCondition(final CpsPathWithSingleLeafConditionContext ctx) { + cpsPathQuery.setCpsPathQueryType(CpsPathQueryType.XPATH_LEAF_VALUE); + } + + @Override + public void exitCpsPathWithDescendant(final CpsPathWithDescendantContext ctx) { + cpsPathQuery.setCpsPathQueryType(CpsPathQueryType.XPATH_HAS_DESCENDANT_ANYWHERE); + cpsPathQuery.setDescendantName(cpsPathQuery.getXpathPrefix().substring(1)); + } + + @Override + public void exitCpsPathWithDescendantAndLeafConditions( + final CpsPathWithDescendantAndLeafConditionsContext ctx) { + cpsPathQuery.setCpsPathQueryType(CpsPathQueryType.XPATH_HAS_DESCENDANT_WITH_LEAF_VALUES); + cpsPathQuery.setDescendantName(cpsPathQuery.getXpathPrefix().substring(1)); + cpsPathQuery.setLeavesData(leavesData); + } + + @Override + public void exitAncestorAxis(final AncestorAxisContext ctx) { + cpsPathQuery.setAncestorSchemaNodeIdentifier(ctx.ancestorPath().getText()); + } + + CpsPathQuery build() { + return cpsPathQuery; + } + + private static String stripFirstAndLastCharacter(final String wrappedString) { + return wrappedString.substring(1, wrappedString.length() - 1); + } + +} |