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DataFusionConstant.java
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97 lines (71 loc) · 2.32 KB
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package sqlancer.datafusion.ast;
public class DataFusionConstant implements DataFusionExpression {
private DataFusionConstant() {
}
public static DataFusionExpression createIntConstant(long val) {
return new DataFusionIntConstant(val);
}
public static DataFusionExpression createNullConstant() {
return new DataFusionNullConstant();
}
public static class DataFusionNullConstant extends DataFusionConstant {
@Override
public String toString() {
return "NULL";
}
}
public static class DataFusionIntConstant extends DataFusionConstant {
private final long value;
public DataFusionIntConstant(long value) {
this.value = value;
}
@Override
public String toString() {
return String.valueOf(value);
}
public long getValue() {
return value;
}
}
public static class DataFusionDoubleConstant extends DataFusionConstant {
private final String valueStr;
public DataFusionDoubleConstant(double value) {
if (value == Double.POSITIVE_INFINITY) {
valueStr = "'+Inf'::Double";
} else if (value == Double.NEGATIVE_INFINITY) {
valueStr = "'-Inf'::Double";
} else if (Double.isNaN(value)) {
valueStr = "'NaN'::Double";
} else if (Double.compare(value, -0.0) == 0) {
valueStr = "-0.0";
} else {
valueStr = String.valueOf(value);
}
}
// Make it more convenient to construct special value like -0, NaN, etc.
public DataFusionDoubleConstant(String valueStr) {
this.valueStr = valueStr;
}
@Override
public String toString() {
return valueStr;
}
}
public static class DataFusionBooleanConstant extends DataFusionConstant {
private final boolean value;
public DataFusionBooleanConstant(boolean value) {
this.value = value;
}
public boolean getValue() {
return value;
}
@Override
public String toString() {
if (value) {
return "true";
} else {
return "false";
}
}
}
}