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/*
* Copyright 2000-2013 JetBrains s.r.o.
*
* 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.intellij.psi.util;
import com.intellij.psi.*;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Arrays;
public abstract class MethodSignatureBase implements MethodSignature {
private final PsiSubstitutor mySubstitutor;
private final PsiType[] myParameterTypes;
private volatile PsiType[] myErasedParameterTypes;
protected final PsiTypeParameter[] myTypeParameters;
protected MethodSignatureBase(@NotNull PsiSubstitutor substitutor, @NotNull PsiType[] parameterTypes, @NotNull PsiTypeParameter[] typeParameters) {
mySubstitutor = substitutor;
assert substitutor.isValid();
myParameterTypes = PsiType.createArray(parameterTypes.length);
for (int i = 0; i < parameterTypes.length; i++) {
PsiType type = parameterTypes[i];
if (type != null) {
PsiUtil.ensureValidType(type);
}
if (type instanceof PsiEllipsisType) type = ((PsiEllipsisType) type).toArrayType();
myParameterTypes[i] = substitutor.substitute(type);
}
myTypeParameters = typeParameters;
}
protected MethodSignatureBase(@NotNull PsiSubstitutor substitutor,
@Nullable PsiParameterList parameterList,
@Nullable PsiTypeParameterList typeParameterList) {
mySubstitutor = substitutor;
if (parameterList == null) {
myParameterTypes = PsiType.EMPTY_ARRAY;
}
else {
final PsiParameter[] parameters = parameterList.getParameters();
myParameterTypes = PsiType.createArray(parameters.length);
for (int i = 0; i < parameters.length; i++) {
PsiType type = parameters[i].getType();
if (type instanceof PsiEllipsisType) type = ((PsiEllipsisType)type).toArrayType();
myParameterTypes[i] = substitutor.substitute(type);
}
}
myTypeParameters = typeParameterList == null ? PsiTypeParameter.EMPTY_ARRAY : typeParameterList.getTypeParameters();
}
@Override
@NotNull
public PsiType[] getParameterTypes() {
return myParameterTypes;
}
@Override
@NotNull
public PsiTypeParameter[] getTypeParameters() {
return myTypeParameters;
}
@NotNull
public PsiType[] getErasedParameterTypes() {
PsiType[] result = myErasedParameterTypes;
if (result == null) {
myErasedParameterTypes = result = MethodSignatureUtil.calcErasedParameterTypes(this);
}
return result;
}
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof MethodSignature)) return false;
final MethodSignature methodSignature = (MethodSignature)o;
return MethodSignatureUtil.areSignaturesEqual(methodSignature, this);
}
public int hashCode() {
int result = getName().hashCode();
final PsiType[] parameterTypes = getErasedParameterTypes();
result = 31 * result + parameterTypes.length;
for (int i = 0, length = Math.min(3, parameterTypes.length); i < length; i++) {
PsiType type = parameterTypes[i];
if (type == null) continue;
result = 31 * result + type.hashCode();
}
return result;
}
@SuppressWarnings({"HardCodedStringLiteral"})
public String toString() {
String s = getClass().getSimpleName() + ": ";
final PsiTypeParameter[] typeParameters = getTypeParameters();
if (typeParameters.length != 0) {
String sep = "<";
for (PsiTypeParameter typeParameter : typeParameters) {
s += sep + typeParameter.getName();
sep = ", ";
}
s += ">";
}
s += getName() + "(" + Arrays.asList(getParameterTypes()) + ")";
return s;
}
@Override
@NotNull
public PsiSubstitutor getSubstitutor() {
return mySubstitutor;
}
}
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