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/*
* Copyright 2017 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 androidx.app.slice.builders;
import static android.support.annotation.RestrictTo.Scope.LIBRARY;
import android.content.Context;
import android.net.Uri;
import android.support.annotation.RestrictTo;
import android.util.Log;
import android.util.Pair;
import java.util.Arrays;
import java.util.List;
import androidx.app.slice.Slice;
import androidx.app.slice.SliceProvider;
import androidx.app.slice.SliceSpec;
import androidx.app.slice.SliceSpecs;
import androidx.app.slice.builders.impl.TemplateBuilderImpl;
/**
* Base class of builders of various template types.
*/
public abstract class TemplateSliceBuilder {
private static final String TAG = "TemplateSliceBuilder";
private final Slice.Builder mBuilder;
private final Context mContext;
private final TemplateBuilderImpl mImpl;
private List<SliceSpec> mSpecs;
/**
*/
public TemplateSliceBuilder(Uri uri) {
this(null, uri);
throw new RuntimeException("Stub, to be removed");
}
/**
* @hide
*/
@RestrictTo(LIBRARY)
protected TemplateSliceBuilder(TemplateBuilderImpl impl) {
mContext = null;
mBuilder = null;
mImpl = impl;
setImpl(impl);
}
/**
* @hide
*/
@RestrictTo(LIBRARY)
protected TemplateSliceBuilder(Slice.Builder b, Context context) {
mBuilder = b;
mContext = context;
mSpecs = getSpecs();
mImpl = selectImpl();
if (mImpl == null) {
throw new IllegalArgumentException("No valid specs found");
}
setImpl(mImpl);
}
/**
* @hide
*/
@RestrictTo(LIBRARY)
public TemplateSliceBuilder(Context context, Uri uri) {
mBuilder = new Slice.Builder(uri);
mContext = context;
mSpecs = getSpecs();
mImpl = selectImpl();
if (mImpl == null) {
throw new IllegalArgumentException("No valid specs found");
}
setImpl(mImpl);
}
/**
* Construct the slice.
*/
public Slice build() {
return mImpl.build();
}
/**
* @hide
*/
@RestrictTo(LIBRARY)
protected Slice.Builder getBuilder() {
return mBuilder;
}
/**
* @hide
*/
@RestrictTo(LIBRARY)
abstract void setImpl(TemplateBuilderImpl impl);
/**
* @hide
*/
@RestrictTo(LIBRARY)
protected TemplateBuilderImpl selectImpl() {
return null;
}
/**
* @hide
*/
@RestrictTo(LIBRARY)
protected boolean checkCompatible(SliceSpec candidate) {
final int size = mSpecs.size();
for (int i = 0; i < size; i++) {
if (mSpecs.get(i).canRender(candidate)) {
return true;
}
}
return false;
}
private List<SliceSpec> getSpecs() {
if (SliceProvider.getCurrentSpecs() != null) {
return SliceProvider.getCurrentSpecs();
}
// TODO: Support getting specs from pinned info.
Log.w(TAG, "Not currently bunding a slice");
return Arrays.asList(SliceSpecs.BASIC);
}
/**
* This is for typing, to clean up the code.
* @hide
*/
@RestrictTo(LIBRARY)
static <T> Pair<SliceSpec, Class<? extends TemplateBuilderImpl>> pair(SliceSpec spec,
Class<T> cls) {
return new Pair(spec, cls);
}
}
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