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/*
 * 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.
 */
package com.hazelcast.org.apache.calcite.linq4j.tree;

import com.hazelcast.org.checkerframework.checker.nullness.qual.Nullable;

import java.lang.reflect.Type;
import java.util.List;
import java.util.Objects;

/**
 * Represents an expression that has a conditional operator.
 *
 * 

With an odd number of expressions * {c0, e0, c1, e1, ..., cn-1, en-1, en} * represents "if (c0) e0 else if (c1) e1 ... else en"; * with an even number of expressions * {c0, e0, c1, e1, ..., cn-1, en-1} * represents * "if (c0) e0 else if (c1) e1 ... else if (cn-1) en-1". *

*/ public class ConditionalExpression extends AbstractNode { final List expressionList; public ConditionalExpression(List expressionList, Type type) { super(ExpressionType.Conditional, type); assert expressionList != null : "expressionList should not be null"; this.expressionList = expressionList; } @Override public R accept(Visitor visitor) { return visitor.visit(this); } @Override void accept(ExpressionWriter writer, int lprec, int rprec) { for (int i = 0; i < expressionList.size(); i += 2) { writer.append(i > 0 ? " else if (" : "if (") .append(expressionList.get(i)) .append(") ") .append(Blocks.toBlock(expressionList.get(i + 1))); } if (expressionList.size() % 2 == 1) { writer.append(" else ") .append( Blocks.toBlock(expressionList.get(expressionList.size() - 1))); } } @Override public boolean equals(@Nullable Object o) { if (this == o) { return true; } if (o == null || getClass() != o.getClass()) { return false; } if (!super.equals(o)) { return false; } ConditionalExpression that = (ConditionalExpression) o; if (!expressionList.equals(that.expressionList)) { return false; } return true; } @Override public int hashCode() { return Objects.hash(nodeType, type, expressionList); } }




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