diff options
Diffstat (limited to 'sli/common/src/main/java/org/onap/ccsdk/sli/core/sli/SvcLogicBinaryExpression.java')
-rw-r--r-- | sli/common/src/main/java/org/onap/ccsdk/sli/core/sli/SvcLogicBinaryExpression.java | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/sli/common/src/main/java/org/onap/ccsdk/sli/core/sli/SvcLogicBinaryExpression.java b/sli/common/src/main/java/org/onap/ccsdk/sli/core/sli/SvcLogicBinaryExpression.java new file mode 100644 index 000000000..a990dd950 --- /dev/null +++ b/sli/common/src/main/java/org/onap/ccsdk/sli/core/sli/SvcLogicBinaryExpression.java @@ -0,0 +1,151 @@ +/*- + * ============LICENSE_START======================================================= + * ONAP : CCSDK + * ================================================================================ + * Copyright (C) 2017 AT&T Intellectual Property. All rights + * reserved. + * ================================================================================ + * Modifications Copyright (C) 2018 IBM. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.ccsdk.sli.core.sli; + +import java.util.LinkedList; +import java.util.List; + +public class SvcLogicBinaryExpression extends SvcLogicExpression { + + + public enum OperatorType { + addOp("+"), + subOp("-"), + multOp("*"), + divOp("/"), + equalOp("=="), + ltOp("<"), + leOp("<="), + gtOp(">"), + geOp(">="), + neOp("!="), + andOp("and"), + orOp("or"); + + private String text; + + private OperatorType(String text) + { + this.text = text; + } + + public String getText() + { + return(text); + } + + public static OperatorType fromString(String text) + { + if (text != null) + { + for (OperatorType t : OperatorType.values()) + { + if (text.equalsIgnoreCase(t.getText())) { + + return(t); + } + } + } + return(null); + } + + public String toString() + { + return(text); + } + } + private List<OperatorType> operators; + + public List<OperatorType> getOperators() { + return operators; + } + + public SvcLogicBinaryExpression() + { + operators = new LinkedList<>(); + } + + public void addOperator(String operator) + { + operators.add(OperatorType.fromString(operator)); + } + + + public String toString() + { + + List<SvcLogicExpression>operands = getOperands(); + StringBuffer sbuff = new StringBuffer(); + + sbuff.append(operands.get(0).toString()); + for (int i = 0 ; i < operators.size(); i++) + { + sbuff.append(" "); + sbuff.append(operators.get(i)); + sbuff.append(" "); + if (i + 1 < operands.size()) { + sbuff.append(operands.get(i + 1).toString()); + } else { + // expression incomplete; operand not bound yet + sbuff.append("?"); + } + } + + return(sbuff.toString()); + + } + + public String asParsedExpr() { + + List<SvcLogicExpression> operands = getOperands(); + + if (operators.isEmpty()) { + return operands.get(0).asParsedExpr(); + } else { + StringBuffer sbuff = new StringBuffer(); + // operators in reverse order for left associativity + for (int i = operators.size() - 1; i >= 0; --i) { + sbuff.append("("); + sbuff.append(operators.get(i).getText()); + sbuff.append(" "); + } + for (int i = 0; i < operators.size() + 1; ++i) { + if (i < operands.size()) { + sbuff.append(operands.get(i).asParsedExpr()); + } else { + // expression incomplete; operand not bound yet + sbuff.append("?"); + } + if (i != 0) { + sbuff.append(")"); + } + if (i < operators.size()) { + sbuff.append(" "); + } + } + return sbuff.toString(); + } + } + +} |