/*
* Copyright 2014 Google Inc. All Rights Reserved.
*
* 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.
*/
package com.google.errorprone.bugpatterns.testdata;
import com.google.errorprone.annotations.NoAllocation;
import java.util.Arrays;
/**
* @author agoode@google.com (Adam Goode)
*/
public class NoAllocationCheckerNegativeCases {
// Calling safe methods is fine.
@NoAllocation
public boolean comparison(int n) {
return n > 1;
}
@NoAllocation
public void callNoAllocationMethod() {
comparison(5);
}
@NoAllocation
@SuppressWarnings({"foo, bar"})
public void annotatedWithArray() {}
@NoAllocation
public boolean arrayComparison(int[] a) {
return a.length > 0 && a[0] > 1;
}
// Non string operations are fine.
@NoAllocation
public int sumInts(int a, int b) {
return a + b;
}
@NoAllocation
public int addOne(int a) {
a += 1;
return a;
}
// Foreach is allowed on arrays.
@NoAllocation
public int forEachArray(int[] a) {
int last = -1;
for (int i : a) {
last = i;
}
return last;
}
// Varargs is ok if no autoboxing occurs.
@NoAllocation
public int varArgsMethod2(int a, int... b) {
return a + b[0];
}
@NoAllocation
public void callVarArgsNoAllocation(int[] b) {
varArgsMethod2(1, b);
}
@NoAllocation
public Object varArgsMethodObject2(Object a, Object... b) {
return b[0];
}
@NoAllocation
public void callVarArgsObject2(Object a, Object[] b) {
varArgsMethodObject2(a, b);
}
// Unboxing is fine.
@NoAllocation
public void unboxByCalling(Integer i) {
comparison(i);
}
@NoAllocation
public int binaryUnbox(Integer a, int b) {
return a + b;
}
// We can call a non-annotated method if we suppress warnings.
@NoAllocation
@SuppressWarnings("NoAllocation")
public void trustMe() {
String s = new String();
}
@NoAllocation
public void trusting() {
trustMe();
}
// Allocations are allowed in a throw statement.
@NoAllocation
public void throwNew() {
throw new RuntimeException();
}
@NoAllocation
public void throwNewArray() {
throw new RuntimeException(Arrays.toString(new int[10]));
}
@NoAllocation
public void throwMethod() {
throw new RuntimeException(Integer.toString(5));
}
@NoAllocation
public void throwStringConcatenation() {
throw new RuntimeException("a" + 5);
}
@NoAllocation
public void throwStringConcatenation2() {
throw new RuntimeException("a" + Integer.toString(5));
}
@NoAllocation
public void throwStringConcatenation3() {
throw new RuntimeException("a" + getInt());
}
@NoAllocation
public String throwStringConvCompoundAssign(int i) {
String s = "";
throw new RuntimeException(s += i);
}
class IntegerException extends RuntimeException {
public IntegerException(Integer i) {
super(i.toString());
}
}
@NoAllocation
public String throwBoxingCompoundAssign(Integer in, int i) {
throw new IntegerException(in += i);
}
@NoAllocation
public String throwBoxingAssign(Integer in, int i) {
throw new IntegerException(in = i);
}
@NoAllocation
public String throwBoxingInitialization(final int i) {
throw new RuntimeException() {
Integer in = i;
};
}
@NoAllocation
public String throwBoxingCast(int i) {
throw new IntegerException((Integer) i);
}
@NoAllocation
public String throwBoxingInvocation(int i) {
throw new IntegerException(i);
}
class VarArgsException extends RuntimeException {
public VarArgsException(int... ints) {
super(Arrays.toString(ints));
}
}
@NoAllocation
public String throwBoxingVarArgs(int i) {
throw new VarArgsException(i, i, i, 4);
}
@NoAllocation
public String throwBoxingUnary(Integer i) {
throw new IntegerException(i++);
}
// All of the positive cases with @NoAllocation removed are below.
public int[] newArray(int size) {
return new int[size];
}
public int[] arrayInitializer(int a, int b) {
int[] array = {a, b};
return array;
}
public int[] returnArrayInitializer(int a, int b) {
return new int[]{a, b};
}
public String newString(String s) {
return new String(s);
}
public String allocateString() {
return new String();
}
public String getString() {
return allocateString();
}
public int getInt() {
return 1;
}
public String stringConvReturn(int i) {
return "" + i;
}
public String stringConvAssign(int i) {
String s = "" + i;
return s;
}
public String stringConvAssign2(int i) {
String s = "";
s = s + i;
return s;
}
public String stringConvAssign3(int i) {
String s = "";
s = i + s;
return s;
}
public String stringConvReturnMethod() {
String s = "" + getInt();
return s;
}
public String stringConvCompoundAssign(int i) {
String s = "";
s += i;
return s;
}
public String stringConvCompoundReturnMethod() {
String s = "";
s += getInt();
return s;
}
public String doubleString(String s) {
return s + s;
}
public String doubleStringCompound(String s) {
s += s;
return s;
}
public int iteration(Iterable<Object> a) {
int result = 0;
for (Object o : a) {
result++;
}
return result;
}
public Integer assignBox(int i) {
Integer in;
in = i;
return in;
}
public Integer initializeBox(int i) {
Integer in = i;
return in;
}
public Integer initializeBoxLiteral() {
Integer in = 0;
return in;
}
public int castBox(int i) {
int in = (Integer) i;
return in;
}
public Integer returnBox(int i) {
return i;
}
public int unBox(Integer i) {
return i;
}
public void callBox(int i) {
unBox(i);
}
public int unBox2(int i1, Integer i2) {
return i2;
}
public void callBox2(int i1, int i2) {
unBox2(i1, i2);
}
public int unBox3(Integer i1, int i2) {
return i1;
}
public void callBox3(int i1, int i2) {
unBox3(i1, i2);
}
public int varArgsMethod(int a, int... b) {
return a + b[0];
}
public void callVarArgs0() {
varArgsMethod(0);
}
public void callVarArgs() {
varArgsMethod(1, 2);
}
public void callVarArgs2() {
varArgsMethod(1, 2, 3);
}
public Object varArgsMethodObject(Object a, Object... b) {
return b[0];
}
public void callVarArgsObject(Object a, Object[] b) {
varArgsMethodObject(a, b[0]);
}
public void callVarArgsObjectWithPrimitiveArray(Object a, int[] b) {
varArgsMethodObject(a, b);
}
public int forBox(int[] a) {
int count = 0;
for (Integer i = 0; i < a.length; i++) {
count++;
}
return count;
}
public void arrayBox(Integer[] a, int i) {
a[0] = i;
}
public int preIncrementBox(Integer i) {
++i;
return i;
}
public int postIncrementBox(Integer i) {
i++;
return i;
}
public int preDecrementBox(Integer i) {
--i;
return i;
}
public int postDecrementBox(Integer i) {
i--;
return i;
}
public int forEachBox(int[] a) {
int last = -1;
for (Integer i : a) {
last = i;
}
return last;
}
public void arrayPreIncrementBox(Integer[] a) {
++a[0];
}
public void arrayPostIncrementBox(Integer[] a) {
a[0]++;
}
public void arrayPreDecrementBox(Integer[] a) {
--a[0];
}
public void arrayPostDecrementBox(Integer[] a) {
a[0]--;
}
public int compoundBox(Integer a, int b) {
a += b;
return a;
}
public void arrayCompoundBox(Integer[] a, int b) {
a[0] += b;
}
public void andAssignmentBox(Integer i1, Integer i2) {
i1 &= i2;
}
public void divideAssignmentBox(Integer i1, Integer i2) {
i1 /= i2;
}
public void leftShiftAssignmentBox(Integer i1, Integer i2) {
i1 <<= i2;
}
public void minusAssignmentBox(Integer i1, Integer i2) {
i1 -= i2;
}
public void multiplyAssignmentBox(Integer i1, Integer i2) {
i1 *= i2;
}
public void orAssignmentBox(Integer i1, Integer i2) {
i1 |= i2;
}
public void plusAssignmentBox(Integer i1, Integer i2) {
i1 += i2;
}
public void remainderAssignmentBox(Integer i1, Integer i2) {
i1 %= i2;
}
public void rightShiftAssignmentBox(Integer i1, Integer i2) {
i1 >>= i2;
}
public void unsignedRightShiftAssignmentBox(Integer i1, Integer i2) {
i1 >>>= i2;
}
public void xorAssignmentBox(Integer i1, Integer i2) {
i1 ^= i2;
}
public Object doClone() throws CloneNotSupportedException {
return clone();
}
@NoAllocation
public String throwForeach(final Iterable<Object> a) {
throw new RuntimeException() {
private void f() {
for (Object o : a) {
a.toString();
}
}
};
}
}