/*
* Copyright (c) 2013, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
*
* 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.google.dart.engine.internal.object;
import com.google.dart.engine.error.CompileTimeErrorCode;
import com.google.dart.engine.utilities.general.ObjectUtilities;
import java.math.BigInteger;
/**
* Instances of the class {@code IntState} represent the state of an object representing an int.
*/
public class IntState extends NumState {
/**
* The value of this instance.
*/
private BigInteger value;
/**
* A state that can be used to represent an int whose value is not known.
*/
public static final IntState UNKNOWN_VALUE = new IntState(null);
/**
* Initialize a newly created state to represent an int with the given value.
*
* @param value the value of this instance
*/
public IntState(BigInteger value) {
this.value = value;
}
@Override
public NumState add(InstanceState rightOperand) throws EvaluationException {
assertNumOrNull(rightOperand);
if (value == null) {
if (rightOperand instanceof DoubleState) {
return DoubleState.UNKNOWN_VALUE;
}
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
}
return new IntState(value.add(rightValue));
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return DoubleState.UNKNOWN_VALUE;
}
return new DoubleState(value.doubleValue() + rightValue.doubleValue());
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public IntState bitAnd(InstanceState rightOperand) throws EvaluationException {
assertIntOrNull(rightOperand);
if (value == null) {
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
}
return new IntState(value.and(rightValue));
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public IntState bitNot() throws EvaluationException {
if (value == null) {
return UNKNOWN_VALUE;
}
return new IntState(value.not());
}
@Override
public IntState bitOr(InstanceState rightOperand) throws EvaluationException {
assertIntOrNull(rightOperand);
if (value == null) {
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
}
return new IntState(value.or(rightValue));
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public IntState bitXor(InstanceState rightOperand) throws EvaluationException {
assertIntOrNull(rightOperand);
if (value == null) {
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
}
return new IntState(value.xor(rightValue));
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public StringState convertToString() {
if (value == null) {
return StringState.UNKNOWN_VALUE;
}
return new StringState(value.toString());
}
@Override
public NumState divide(InstanceState rightOperand) throws EvaluationException {
assertNumOrNull(rightOperand);
if (value == null) {
if (rightOperand instanceof DoubleState) {
return DoubleState.UNKNOWN_VALUE;
}
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
} else if (rightValue.equals(BigInteger.ZERO)) {
return new DoubleState(value.doubleValue() / rightValue.doubleValue());
}
return new IntState(value.divide(rightValue));
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return DoubleState.UNKNOWN_VALUE;
}
return new DoubleState(value.doubleValue() / rightValue.doubleValue());
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public BoolState equalEqual(InstanceState rightOperand) throws EvaluationException {
assertBoolNumStringOrNull(rightOperand);
if (value == null) {
return BoolState.UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.from(value.equals(rightValue));
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.from(rightValue.equals(value.doubleValue()));
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.FALSE_STATE;
}
@Override
public boolean equals(Object object) {
return object instanceof IntState && ObjectUtilities.equals(value, ((IntState) object).value);
}
@Override
public String getTypeName() {
return "int"; //$NON-NLS-0$
}
@Override
public BigInteger getValue() {
return value;
}
@Override
public BoolState greaterThan(InstanceState rightOperand) throws EvaluationException {
assertNumOrNull(rightOperand);
if (value == null) {
return BoolState.UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.from(value.compareTo(rightValue) > 0);
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.from(value.doubleValue() > rightValue.doubleValue());
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return BoolState.UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public BoolState greaterThanOrEqual(InstanceState rightOperand) throws EvaluationException {
assertNumOrNull(rightOperand);
if (value == null) {
return BoolState.UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.from(value.compareTo(rightValue) >= 0);
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.from(value.doubleValue() >= rightValue.doubleValue());
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return BoolState.UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public boolean hasExactValue() {
return true;
}
@Override
public int hashCode() {
return value == null ? 0 : value.hashCode();
}
@Override
public IntState integerDivide(InstanceState rightOperand) throws EvaluationException {
assertNumOrNull(rightOperand);
if (value == null) {
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
} else if (rightValue.equals(BigInteger.ZERO)) {
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_IDBZE);
}
return new IntState(value.divide(rightValue));
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
}
double result = value.doubleValue() / rightValue.doubleValue();
return new IntState(BigInteger.valueOf((long) result));
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public boolean isBoolNumStringOrNull() {
return true;
}
@Override
public boolean isUnknown() {
return value == null;
}
@Override
public BoolState lessThan(InstanceState rightOperand) throws EvaluationException {
assertNumOrNull(rightOperand);
if (value == null) {
return BoolState.UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.from(value.compareTo(rightValue) < 0);
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.from(value.doubleValue() < rightValue.doubleValue());
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return BoolState.UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public BoolState lessThanOrEqual(InstanceState rightOperand) throws EvaluationException {
assertNumOrNull(rightOperand);
if (value == null) {
return BoolState.UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.from(value.compareTo(rightValue) <= 0);
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return BoolState.UNKNOWN_VALUE;
}
return BoolState.from(value.doubleValue() <= rightValue.doubleValue());
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return BoolState.UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public NumState minus(InstanceState rightOperand) throws EvaluationException {
assertNumOrNull(rightOperand);
if (value == null) {
if (rightOperand instanceof DoubleState) {
return DoubleState.UNKNOWN_VALUE;
}
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
}
return new IntState(value.subtract(rightValue));
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return DoubleState.UNKNOWN_VALUE;
}
return new DoubleState(value.doubleValue() - rightValue.doubleValue());
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public NumState negated() throws EvaluationException {
if (value == null) {
return UNKNOWN_VALUE;
}
return new IntState(value.negate());
}
@Override
public NumState remainder(InstanceState rightOperand) throws EvaluationException {
assertNumOrNull(rightOperand);
if (value == null) {
if (rightOperand instanceof DoubleState) {
return DoubleState.UNKNOWN_VALUE;
}
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
} else if (rightValue.equals(BigInteger.ZERO)) {
return new DoubleState(value.doubleValue() % rightValue.doubleValue());
}
return new IntState(value.remainder(rightValue));
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return DoubleState.UNKNOWN_VALUE;
}
return new DoubleState(value.doubleValue() % rightValue.doubleValue());
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public IntState shiftLeft(InstanceState rightOperand) throws EvaluationException {
assertIntOrNull(rightOperand);
if (value == null) {
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
} else if (rightValue.bitLength() > 31) {
return UNKNOWN_VALUE;
}
return new IntState(value.shiftLeft(rightValue.intValue()));
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public IntState shiftRight(InstanceState rightOperand) throws EvaluationException {
assertIntOrNull(rightOperand);
if (value == null) {
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
} else if (rightValue.bitLength() > 31) {
return UNKNOWN_VALUE;
}
return new IntState(value.shiftRight(rightValue.intValue()));
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public NumState times(InstanceState rightOperand) throws EvaluationException {
assertNumOrNull(rightOperand);
if (value == null) {
if (rightOperand instanceof DoubleState) {
return DoubleState.UNKNOWN_VALUE;
}
return UNKNOWN_VALUE;
}
if (rightOperand instanceof IntState) {
BigInteger rightValue = ((IntState) rightOperand).getValue();
if (rightValue == null) {
return UNKNOWN_VALUE;
}
return new IntState(value.multiply(rightValue));
} else if (rightOperand instanceof DoubleState) {
Double rightValue = ((DoubleState) rightOperand).getValue();
if (rightValue == null) {
return DoubleState.UNKNOWN_VALUE;
}
return new DoubleState(value.doubleValue() * rightValue.doubleValue());
} else if (rightOperand instanceof DynamicState || rightOperand instanceof NumState) {
return UNKNOWN_VALUE;
}
throw new EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
}
@Override
public String toString() {
return value == null ? "-unknown-" : value.toString();
}
}