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/*
* ============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=========================================================
*/
package org.onap.cps.cpspath.parser;
import static org.onap.cps.cpspath.parser.CpsPathPrefixType.DESCENDANT;
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.DescendantContext;
import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.IncorrectPrefixContext;
import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.LeafConditionContext;
import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.MultipleLeafConditionsContext;
import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.PrefixContext;
import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.TextFunctionConditionContext;
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 exitIncorrectPrefix(final IncorrectPrefixContext ctx) {
throw new IllegalStateException("CPS path can only start with one or two slashes (/)");
}
@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 exitDescendant(final DescendantContext ctx) {
cpsPathQuery.setCpsPathPrefixType(DESCENDANT);
cpsPathQuery.setDescendantName(ctx.getText().substring(2));
}
@Override
public void enterMultipleLeafConditions(final MultipleLeafConditionsContext ctx) {
leavesData.clear();
}
@Override
public void exitMultipleLeafConditions(final MultipleLeafConditionsContext ctx) {
cpsPathQuery.setLeavesData(leavesData);
}
@Override
public void exitAncestorAxis(final AncestorAxisContext ctx) {
cpsPathQuery.setAncestorSchemaNodeIdentifier(ctx.ancestorPath().getText());
}
@Override
public void exitTextFunctionCondition(final TextFunctionConditionContext ctx) {
cpsPathQuery.setTextFunctionConditionLeafName(ctx.leafName().getText());
cpsPathQuery.setTextFunctionConditionValue(stripFirstAndLastCharacter(ctx.StringLiteral().getText()));
}
CpsPathQuery build() {
return cpsPathQuery;
}
private static String stripFirstAndLastCharacter(final String wrappedString) {
return wrappedString.substring(1, wrappedString.length() - 1);
}
}
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