/*
* Copyright 2010 the original author or authors.
*
* 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 org.gradle.build.docs.dsl.source.model;
import org.gradle.api.Action;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
/**
* Static meta-data about a type reference extracted from source.
*/
public class TypeMetaData implements Serializable, TypeContainer {
public static final TypeMetaData VOID = new TypeMetaData("void");
public static final TypeMetaData OBJECT = new TypeMetaData("java.lang.Object");
private String name;
private int arrayDimensions;
private boolean varargs;
private List<TypeMetaData> typeArgs;
private boolean wildcard;
private TypeMetaData upperBounds;
private TypeMetaData lowerBounds;
public TypeMetaData(String name) {
this.name = name;
}
public TypeMetaData() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getArrayDimensions() {
return arrayDimensions + (varargs ? 1 : 0);
}
public TypeMetaData addArrayDimension() {
arrayDimensions++;
return this;
}
public boolean isVarargs() {
return varargs;
}
public TypeMetaData setVarargs() {
this.varargs = true;
return this;
}
public List<TypeMetaData> getTypeArgs() {
return typeArgs;
}
public TypeMetaData getRawType() {
if (wildcard || lowerBounds != null) {
return OBJECT;
}
if (upperBounds != null) {
return upperBounds.getRawType();
}
TypeMetaData rawType = new TypeMetaData(name);
rawType.arrayDimensions = arrayDimensions;
if (varargs) {
rawType.arrayDimensions++;
}
return rawType;
}
public String getSignature() {
final StringBuilder builder = new StringBuilder();
visitSignature(new SignatureVisitor() {
public void visitText(String text) {
builder.append(text);
}
public void visitType(String name) {
builder.append(name);
}
});
return builder.toString();
}
public String getArraySuffix() {
StringBuilder builder = new StringBuilder();
for (int i = 0; i < arrayDimensions; i++) {
builder.append("[]");
}
if (varargs) {
builder.append("...");
}
return builder.toString();
}
public TypeMetaData addTypeArg(TypeMetaData typeArg) {
if (typeArgs == null) {
typeArgs = new ArrayList<TypeMetaData>();
}
typeArgs.add(typeArg);
return this;
}
public void visitTypes(Action<TypeMetaData> action) {
if (wildcard) {
return;
}
if (upperBounds != null) {
upperBounds.visitTypes(action);
return;
}
if (lowerBounds != null) {
lowerBounds.visitTypes(action);
return;
}
action.execute(this);
if (typeArgs != null) {
for (TypeMetaData typeArg : typeArgs) {
typeArg.visitTypes(action);
}
}
}
public void visitSignature(SignatureVisitor visitor) {
if (wildcard) {
visitor.visitText("?");
} else if (upperBounds != null) {
visitor.visitText("? extends ");
upperBounds.visitSignature(visitor);
} else if (lowerBounds != null) {
visitor.visitText("? super ");
lowerBounds.visitSignature(visitor);
} else {
visitor.visitType(name);
if (typeArgs != null) {
visitor.visitText("<");
for (int i = 0; i < typeArgs.size(); i++) {
if (i > 0) {
visitor.visitText(", ");
}
TypeMetaData typeArg = typeArgs.get(i);
typeArg.visitSignature(visitor);
}
visitor.visitText(">");
}
String suffix = getArraySuffix();
if (suffix.length() > 0) {
visitor.visitText(suffix);
}
}
}
public TypeMetaData setWildcard() {
wildcard = true;
return this;
}
public TypeMetaData setUpperBounds(TypeMetaData upperBounds) {
this.upperBounds = upperBounds;
return this;
}
public TypeMetaData setLowerBounds(TypeMetaData lowerBounds) {
this.lowerBounds = lowerBounds;
return this;
}
public interface SignatureVisitor {
void visitText(String text);
void visitType(String name);
}
}