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// Copyright 2016 The Bazel Authors. 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.devtools.build.android.xml;
import com.google.common.base.MoreObjects;
import com.google.devtools.build.android.AndroidDataWritingVisitor;
import com.google.devtools.build.android.AndroidDataWritingVisitor.StartTag;
import com.google.devtools.build.android.AndroidResourceSymbolSink;
import com.google.devtools.build.android.DataSource;
import com.google.devtools.build.android.FullyQualifiedName;
import com.google.devtools.build.android.XmlResourceValue;
import com.google.devtools.build.android.XmlResourceValues;
import com.google.devtools.build.android.proto.SerializeFormat;
import com.google.devtools.build.android.proto.SerializeFormat.DataValueXml;
import com.google.devtools.build.android.proto.SerializeFormat.DataValueXml.XmlType;
import com.google.protobuf.CodedOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Objects;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
/**
* Represents an Android Resource id.
*
* <p>
* Ids (http://developer.android.com/guide/topics/resources/more-resources.html#Id) are special --
* unlike other resources they cannot be overridden. This is due to the nature of their usage. Each
* id corresponds to context sensitive resource of component, meaning that they have no intrinsic
* defined value. They exist to reference parts of other resources. Ids can also be declared on the
* fly in components with the syntax @[+][package:]id/resource_name.
*/
@Immutable
public class IdXmlResourceValue implements XmlResourceValue {
static final IdXmlResourceValue SINGLETON = new IdXmlResourceValue(null);
private String value;
public static XmlResourceValue of() {
return SINGLETON;
}
public static XmlResourceValue of(@Nullable String value) {
if (value == null) {
return of();
}
return new IdXmlResourceValue(value);
}
private IdXmlResourceValue(String value) {
this.value = value;
}
@Override
public void write(
FullyQualifiedName key, DataSource source, AndroidDataWritingVisitor mergedDataWriter) {
if (!source.isInValuesFolder()) {
/* Don't write IDs that were never defined in values, into the merged values.xml, to preserve
* the way initializers are assigned in the R class. Depends on
* DataSource#combine to accurately determine when a value is ever defined in a
* values file.
*/
return;
}
StartTag startTag =
mergedDataWriter
.define(key)
.derivedFrom(source)
.startItemTag()
.named(key)
.attribute("type")
.setTo("id");
if (value == null) {
startTag.closeUnaryTag().save();
} else {
startTag.closeTag().addCharactersOf(value).endTag().save();
}
}
@Override
public void writeResourceToClass(FullyQualifiedName key, AndroidResourceSymbolSink sink) {
sink.acceptSimpleResource(key.type(), key.name());
}
@Override
public int serializeTo(int sourceId, Namespaces namespaces, OutputStream output)
throws IOException {
DataValueXml.Builder xmlValue =
SerializeFormat.DataValueXml.newBuilder()
.setType(XmlType.ID)
.putAllNamespace(namespaces.asMap());
if (value != null) {
xmlValue.setValue(value);
}
SerializeFormat.DataValue dataValue =
XmlResourceValues.newSerializableDataValueBuilder(sourceId).setXmlValue(xmlValue).build();
dataValue.writeDelimitedTo(output);
return CodedOutputStream.computeUInt32SizeNoTag(dataValue.getSerializedSize())
+ dataValue.getSerializedSize();
}
@Override
public int hashCode() {
return value != null ? value.hashCode() : super.hashCode();
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof IdXmlResourceValue)) {
return false;
}
IdXmlResourceValue other = (IdXmlResourceValue) obj;
return Objects.equals(value, other.value);
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass()).add("value", value).toString();
}
@Override
public XmlResourceValue combineWith(XmlResourceValue resourceValue) {
if (equals(resourceValue)) {
return this;
}
if (resourceValue instanceof IdXmlResourceValue) {
IdXmlResourceValue otherId = (IdXmlResourceValue) resourceValue;
if (value == null && otherId.value != null) {
return otherId;
}
if (value != null && otherId.value == null) {
return this;
}
}
throw new IllegalArgumentException(resourceValue + "is not combinable with " + this);
}
@Override
public String asConflictStringWith(DataSource source) {
return source.asConflictString();
}
}
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