/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* This program is free software: you can redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License along with this program.
* If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.tools.expression.internal.function.comparison;
import java.util.Date;
import java.util.concurrent.Callable;
import com.rapidminer.tools.Ontology;
import com.rapidminer.tools.expression.DoubleCallable;
import com.rapidminer.tools.expression.ExpressionEvaluator;
import com.rapidminer.tools.expression.ExpressionParsingException;
import com.rapidminer.tools.expression.ExpressionType;
import com.rapidminer.tools.expression.FunctionDescription;
import com.rapidminer.tools.expression.FunctionInputException;
import com.rapidminer.tools.expression.internal.SimpleExpressionEvaluator;
import com.rapidminer.tools.expression.internal.function.AbstractFunction;
/**
* Abstract class for a equality check function that has two arbitrary inputs
*
* @author Sabrina Kirstein
*/
public abstract class AbstractEqualityFunctionWith2Inputs extends AbstractFunction {
/**
* Constructs an equality check Function with 2 parameters with {@link FunctionDescription}
*/
public AbstractEqualityFunctionWith2Inputs(String i18nKey) {
super(i18nKey, 2, Ontology.BINOMINAL);
}
@Override
public ExpressionEvaluator compute(ExpressionEvaluator... inputEvaluators) {
if (inputEvaluators.length != 2) {
throw new FunctionInputException("expression_parser.function_wrong_input", getFunctionName(), 2,
inputEvaluators.length);
}
ExpressionType type = getResultType(inputEvaluators);
ExpressionEvaluator left = inputEvaluators[0];
ExpressionEvaluator right = inputEvaluators[1];
return new SimpleExpressionEvaluator(makeBooleanCallable(left, right), isResultConstant(inputEvaluators), type);
}
/**
* Builds a boolean callable from two {@link ExpressionEvaluator}s, where constant child results
* are evaluated.
*
* @param left
* {@link ExpressionEvaluator}
* @param right
* {@link ExpressionEvaluator}
* @return the resulting boolean callable
*/
protected Callable<Boolean> makeBooleanCallable(ExpressionEvaluator left, ExpressionEvaluator right) {
ExpressionType leftType = left.getType();
ExpressionType rightType = right.getType();
// Any type checked against any type is allowed
try {
switch (leftType) {
case INTEGER:
case DOUBLE:
final DoubleCallable funcLeftDouble = left.getDoubleFunction();
final double valueLeftDouble = left.isConstant() ? funcLeftDouble.call() : Double.NaN;
switch (rightType) {
case INTEGER:
case DOUBLE:
final DoubleCallable funcRightDouble = right.getDoubleFunction();
final double valueRightDouble = right.isConstant() ? funcRightDouble.call() : Double.NaN;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftDouble, valueRightDouble);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftDouble, funcRightDouble.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDouble.call(), valueRightDouble);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDouble.call(), funcRightDouble.call());
}
};
}
case STRING:
final Callable<String> funcRightString = right.getStringFunction();
final String valueRightString = right.isConstant() ? funcRightString.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftDouble, valueRightString);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftDouble, funcRightString.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDouble.call(), valueRightString);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDouble.call(), funcRightString.call());
}
};
}
case DATE:
final Callable<Date> funcRightDate = right.getDateFunction();
final Date valueRightDate = right.isConstant() ? funcRightDate.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftDouble, valueRightDate);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftDouble, funcRightDate.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDouble.call(), valueRightDate);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDouble.call(), funcRightDate.call());
}
};
}
case BOOLEAN:
final Callable<Boolean> funcRightBoolean = right.getBooleanFunction();
final Boolean valueRightBoolean = right.isConstant() ? funcRightBoolean.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftDouble, valueRightBoolean);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftDouble, funcRightBoolean.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDouble.call(), valueRightBoolean);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDouble.call(), funcRightBoolean.call());
}
};
}
default:
return null;
}
case STRING:
final Callable<String> funcLeftString = left.getStringFunction();
final String valueLeftString = left.isConstant() ? funcLeftString.call() : null;
switch (rightType) {
case INTEGER:
case DOUBLE:
final DoubleCallable funcRightDouble = right.getDoubleFunction();
final double valueRightDouble = right.isConstant() ? funcRightDouble.call() : Double.NaN;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftString, valueRightDouble);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftString, funcRightDouble.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftString.call(), valueRightDouble);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftString.call(), funcRightDouble.call());
}
};
}
case STRING:
final Callable<String> funcRightString = right.getStringFunction();
final String valueRightString = right.isConstant() ? funcRightString.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftString, valueRightString);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftString, funcRightString.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftString.call(), valueRightString);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftString.call(), funcRightString.call());
}
};
}
case DATE:
final Callable<Date> funcRightDate = right.getDateFunction();
final Date valueRightDate = right.isConstant() ? funcRightDate.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftString, valueRightDate);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftString, funcRightDate.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftString.call(), valueRightDate);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftString.call(), funcRightDate.call());
}
};
}
case BOOLEAN:
final Callable<Boolean> funcRightBoolean = right.getBooleanFunction();
final Boolean valueRightBoolean = right.isConstant() ? funcRightBoolean.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftString, valueRightBoolean);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftString, funcRightBoolean.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftString.call(), valueRightBoolean);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftString.call(), funcRightBoolean.call());
}
};
}
default:
return null;
}
case DATE:
final Callable<Date> funcLeftDate = left.getDateFunction();
final Date valueLeftDate = left.isConstant() ? funcLeftDate.call() : null;
switch (rightType) {
case INTEGER:
case DOUBLE:
final DoubleCallable funcRightDouble = right.getDoubleFunction();
final double valueRightDouble = right.isConstant() ? funcRightDouble.call() : Double.NaN;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftDate, valueRightDouble);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftDate, funcRightDouble.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDate.call(), valueRightDouble);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDate.call(), funcRightDouble.call());
}
};
}
case STRING:
final Callable<String> funcRightString = right.getStringFunction();
final String valueRightString = right.isConstant() ? funcRightString.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftDate, valueRightString);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftDate, funcRightString.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDate.call(), valueRightString);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDate.call(), funcRightString.call());
}
};
}
case DATE:
final Callable<Date> funcRightDate = right.getDateFunction();
final Date valueRightDate = right.isConstant() ? funcRightDate.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftDate, valueRightDate);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftDate, funcRightDate.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDate.call(), valueRightDate);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDate.call(), funcRightDate.call());
}
};
}
case BOOLEAN:
final Callable<Boolean> funcRightBoolean = right.getBooleanFunction();
final Boolean valueRightBoolean = right.isConstant() ? funcRightBoolean.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftDate, valueRightBoolean);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftDate, funcRightBoolean.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDate.call(), valueRightBoolean);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftDate.call(), funcRightBoolean.call());
}
};
}
default:
return null;
}
case BOOLEAN:
final Callable<Boolean> funcLeftBoolean = left.getBooleanFunction();
final Boolean valueLeftBoolean = left.isConstant() ? funcLeftBoolean.call() : null;
switch (rightType) {
case INTEGER:
case DOUBLE:
final DoubleCallable funcRightDouble = right.getDoubleFunction();
final double valueRightDouble = right.isConstant() ? funcRightDouble.call() : Double.NaN;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftBoolean, valueRightDouble);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftBoolean, funcRightDouble.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftBoolean.call(), valueRightDouble);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftBoolean.call(), funcRightDouble.call());
}
};
}
case STRING:
final Callable<String> funcRightString = right.getStringFunction();
final String valueRightString = right.isConstant() ? funcRightString.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftBoolean, valueRightString);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftBoolean, funcRightString.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftBoolean.call(), valueRightString);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftBoolean.call(), funcRightString.call());
}
};
}
case DATE:
final Callable<Date> funcRightDate = right.getDateFunction();
final Date valueRightDate = right.isConstant() ? funcRightDate.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftBoolean, valueRightDate);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftBoolean, funcRightDate.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftBoolean.call(), valueRightDate);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftBoolean.call(), funcRightDate.call());
}
};
}
case BOOLEAN:
final Callable<Boolean> funcRightBoolean = right.getBooleanFunction();
final Boolean valueRightBoolean = right.isConstant() ? funcRightBoolean.call() : null;
if (left.isConstant() && right.isConstant()) {
final Boolean result = compute(valueLeftBoolean, valueRightBoolean);
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return result;
}
};
} else if (left.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(valueLeftBoolean, funcRightBoolean.call());
}
};
} else if (right.isConstant()) {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftBoolean.call(), valueRightBoolean);
}
};
} else {
return new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return compute(funcLeftBoolean.call(), funcRightBoolean.call());
}
};
}
default:
return null;
}
default:
return null;
}
} catch (ExpressionParsingException e) {
throw e;
} catch (Exception e) {
throw new ExpressionParsingException(e);
}
}
/**
* Computes the result for two double values.
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected abstract Boolean compute(double left, double right);
/**
* Computes the result for a double and a boolean value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected abstract Boolean compute(double left, Boolean right);
/**
* Computes the result for a boolean and a double value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected Boolean compute(Boolean left, double right) {
return compute(right, left);
}
/**
* Computes the result for a double and a String value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected abstract Boolean compute(double left, String right);
/**
* Computes the result for a String and a double value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected Boolean compute(String left, double right) {
return compute(right, left);
}
/**
* Computes the result for a double value and a date
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected abstract Boolean compute(double left, Date right);
/**
* Computes the result for a date value and a double value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected Boolean compute(Date left, double right) {
return compute(right, left);
}
/**
* Computes the result for two boolean values.
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected abstract Boolean compute(Boolean left, Boolean right);
/**
* Computes the result for a boolean and a String value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected abstract Boolean compute(Boolean left, String right);
/**
* Computes the result for a String value and a boolean value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected Boolean compute(String left, Boolean right) {
return compute(right, left);
}
/**
* Computes the result for a boolean value and a String value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected abstract Boolean compute(Boolean left, Date right);
/**
* Computes the result for a date value and a boolean value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected Boolean compute(Date left, Boolean right) {
return compute(right, left);
}
/**
* Computes the result for two String values.
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected abstract Boolean compute(String left, String right);
/**
* Computes the result for a String value and a Date value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected abstract Boolean compute(String left, Date right);
/**
* Computes the result for a Date value and a String value
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected Boolean compute(Date left, String right) {
return compute(right, left);
}
/**
* Computes the result for two Date values.
*
* @param left
* value
* @param right
* value
* @return the result of the computation.
*/
protected abstract Boolean compute(Date left, Date right);
@Override
protected ExpressionType computeType(ExpressionType... inputTypes) {
if (inputTypes.length != 2) {
throw new FunctionInputException("expression_parser.function_wrong_input", getFunctionName(), "2",
inputTypes.length);
}
// result is always boolean
return ExpressionType.BOOLEAN;
}
}