/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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 android.databinding.tool.reflection;
import android.databinding.tool.reflection.annotation.AnnotationAnalyzer;
import android.databinding.tool.util.L;
import android.databinding.tool.util.Preconditions;
import java.util.Map;
import javax.annotation.processing.ProcessingEnvironment;
/**
* This is the base class for several implementations of something that
* acts like a ClassLoader. Different implementations work with the Annotation
* Processor, ClassLoader, and an Android Studio plugin.
*/
public abstract class ModelAnalyzer {
public static final String[] LIST_CLASS_NAMES = {
"java.util.List",
"android.util.SparseArray",
"android.util.SparseBooleanArray",
"android.util.SparseIntArray",
"android.util.SparseLongArray",
"android.util.LongSparseArray",
"android.support.v4.util.LongSparseArray",
};
public static final String MAP_CLASS_NAME = "java.util.Map";
public static final String STRING_CLASS_NAME = "java.lang.String";
public static final String OBJECT_CLASS_NAME = "java.lang.Object";
public static final String OBSERVABLE_CLASS_NAME = "android.databinding.Observable";
public static final String OBSERVABLE_LIST_CLASS_NAME = "android.databinding.ObservableList";
public static final String OBSERVABLE_MAP_CLASS_NAME = "android.databinding.ObservableMap";
public static final String[] OBSERVABLE_FIELDS = {
"android.databinding.ObservableBoolean",
"android.databinding.ObservableByte",
"android.databinding.ObservableChar",
"android.databinding.ObservableShort",
"android.databinding.ObservableInt",
"android.databinding.ObservableLong",
"android.databinding.ObservableFloat",
"android.databinding.ObservableDouble",
"android.databinding.ObservableField",
"android.databinding.ObservableParcelable",
};
public static final String VIEW_DATA_BINDING =
"android.databinding.ViewDataBinding";
public static final String VIEW_STUB_CLASS_NAME = "android.view.ViewStub";
private ModelClass[] mListTypes;
private ModelClass mMapType;
private ModelClass mStringType;
private ModelClass mObjectType;
private ModelClass mObservableType;
private ModelClass mObservableListType;
private ModelClass mObservableMapType;
private ModelClass[] mObservableFieldTypes;
private ModelClass mViewBindingType;
private ModelClass mViewStubType;
private static ModelAnalyzer sAnalyzer;
protected void setInstance(ModelAnalyzer analyzer) {
sAnalyzer = analyzer;
}
public ModelClass findCommonParentOf(ModelClass modelClass1,
ModelClass modelClass2) {
ModelClass curr = modelClass1;
while (curr != null && !curr.isAssignableFrom(modelClass2)) {
curr = curr.getSuperclass();
}
if (curr == null) {
ModelClass primitive1 = modelClass1.unbox();
ModelClass primitive2 = modelClass2.unbox();
if (!modelClass1.equals(primitive1) || !modelClass2.equals(primitive2)) {
return findCommonParentOf(primitive1, primitive2);
}
}
Preconditions.checkNotNull(curr,
"must be able to find a common parent for " + modelClass1 + " and " + modelClass2);
return curr;
}
public abstract ModelClass loadPrimitive(String className);
public static ModelAnalyzer getInstance() {
return sAnalyzer;
}
public static void setProcessingEnvironment(ProcessingEnvironment processingEnvironment) {
if (sAnalyzer != null) {
throw new IllegalStateException("processing env is already created, you cannot "
+ "change class loader after that");
}
L.d("setting processing env to %s", processingEnvironment);
AnnotationAnalyzer annotationAnalyzer = new AnnotationAnalyzer(processingEnvironment);
sAnalyzer = annotationAnalyzer;
}
/**
* Takes a raw className (potentially w/ generics and arrays) and expands definitions using
* the import statements.
* <p>
* For instance, this allows user to define variables
* <variable type="User" name="user"/>
* if they previously imported User.
* <import name="com.example.User"/>
*/
public String applyImports(String className, Map<String, String> imports) {
className = className.trim();
int numDimensions = 0;
String generic = null;
// handle array
while (className.endsWith("[]")) {
numDimensions++;
className = className.substring(0, className.length() - 2);
}
// handle generics
final int lastCharIndex = className.length() - 1;
if ('>' == className.charAt(lastCharIndex)) {
// has generic.
int open = className.indexOf('<');
if (open == -1) {
L.e("un-matching generic syntax for %s", className);
return className;
}
generic = applyImports(className.substring(open + 1, lastCharIndex), imports);
className = className.substring(0, open);
}
int dotIndex = className.indexOf('.');
final String qualifier;
final String rest;
if (dotIndex == -1) {
qualifier = className;
rest = null;
} else {
qualifier = className.substring(0, dotIndex);
rest = className.substring(dotIndex); // includes dot
}
final String expandedQualifier = imports.get(qualifier);
String result;
if (expandedQualifier != null) {
result = rest == null ? expandedQualifier : expandedQualifier + rest;
} else {
result = className; // no change
}
// now append back dimension and generics
if (generic != null) {
result = result + "<" + applyImports(generic, imports) + ">";
}
while (numDimensions-- > 0) {
result = result + "[]";
}
return result;
}
public String getDefaultValue(String className) {
if ("int".equals(className)) {
return "0";
}
if ("short".equals(className)) {
return "0";
}
if ("long".equals(className)) {
return "0L";
}
if ("float".equals(className)) {
return "0f";
}
if ("double".equals(className)) {
return "0.0";
}
if ("boolean".equals(className)) {
return "false";
}
if ("char".equals(className)) {
return "'\\u0000'";
}
if ("byte".equals(className)) {
return "0";
}
return "null";
}
public abstract ModelClass findClass(String className, Map<String, String> imports);
public abstract ModelClass findClass(Class classType);
public abstract TypeUtil createTypeUtil();
ModelClass[] getListTypes() {
if (mListTypes == null) {
mListTypes = new ModelClass[LIST_CLASS_NAMES.length];
for (int i = 0; i < mListTypes.length; i++) {
final ModelClass modelClass = findClass(LIST_CLASS_NAMES[i], null);
if (modelClass != null) {
mListTypes[i] = modelClass.erasure();
}
}
}
return mListTypes;
}
public ModelClass getMapType() {
if (mMapType == null) {
mMapType = loadClassErasure(MAP_CLASS_NAME);
}
return mMapType;
}
ModelClass getStringType() {
if (mStringType == null) {
mStringType = findClass(STRING_CLASS_NAME, null);
}
return mStringType;
}
ModelClass getObjectType() {
if (mObjectType == null) {
mObjectType = findClass(OBJECT_CLASS_NAME, null);
}
return mObjectType;
}
ModelClass getObservableType() {
if (mObservableType == null) {
mObservableType = findClass(OBSERVABLE_CLASS_NAME, null);
}
return mObservableType;
}
ModelClass getObservableListType() {
if (mObservableListType == null) {
mObservableListType = loadClassErasure(OBSERVABLE_LIST_CLASS_NAME);
}
return mObservableListType;
}
ModelClass getObservableMapType() {
if (mObservableMapType == null) {
mObservableMapType = loadClassErasure(OBSERVABLE_MAP_CLASS_NAME);
}
return mObservableMapType;
}
ModelClass getViewDataBindingType() {
if (mViewBindingType == null) {
mViewBindingType = findClass(VIEW_DATA_BINDING, null);
}
return mViewBindingType;
}
protected ModelClass[] getObservableFieldTypes() {
if (mObservableFieldTypes == null) {
mObservableFieldTypes = new ModelClass[OBSERVABLE_FIELDS.length];
for (int i = 0; i < OBSERVABLE_FIELDS.length; i++) {
mObservableFieldTypes[i] = loadClassErasure(OBSERVABLE_FIELDS[i]);
}
}
return mObservableFieldTypes;
}
ModelClass getViewStubType() {
if (mViewStubType == null) {
mViewStubType = findClass(VIEW_STUB_CLASS_NAME, null);
}
return mViewStubType;
}
private ModelClass loadClassErasure(String className) {
return findClass(className, null).erasure();
}
}