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// Copyright 2017 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.Joiner;
import com.google.common.base.MoreObjects;
import com.google.common.collect.Iterables;
import com.google.devtools.build.android.AndroidDataWritingVisitor;
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.errorprone.annotations.Immutable;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.Objects;
/**
* An attribute associated with the root <resources> tag of an xml file in a values folder.
*/
public class ResourcesAttribute implements XmlResourceValue {
@Immutable
private interface Combiner {
public String combine(String first, String second);
}
private static final Combiner COMMA_SEPARATED_COMBINER = new Combiner() {
private final Joiner joiner = Joiner.on(',');
@Override
public String combine(String first, String second) {
return joiner.join(first, second);
}
};
/**
* Represents the semantic meaning of an xml attribute and how it is combined with other
* attributes of the same type.
*/
public static enum AttributeType {
UNCOMBINABLE(null, null),
TOOLS_IGNORE("{http://schemas.android.com/tools}ignore", COMMA_SEPARATED_COMBINER),
TOOLS_MENU("{http://schemas.android.com/tools}menu", COMMA_SEPARATED_COMBINER),
TOOLS_KEEP("{http://schemas.android.com/tools}keep", COMMA_SEPARATED_COMBINER),
TOOLS_DISCARD("{http://schemas.android.com/tools}discard", COMMA_SEPARATED_COMBINER);
public static AttributeType from(String name) {
if (name == null) {
return UNCOMBINABLE;
}
for (AttributeType type : AttributeType.values()) {
if (name.equals(type.name)) {
return type;
}
}
return UNCOMBINABLE;
}
private final String name;
public final Combiner combiner;
private AttributeType(String name, Combiner combiner) {
this.name = name;
this.combiner = combiner;
}
public boolean isCombining() {
return this != UNCOMBINABLE;
}
}
public static ResourcesAttribute of(FullyQualifiedName fqn, String name, String value) {
return new ResourcesAttribute(AttributeType.from(fqn.name()), name, value);
}
public static ResourcesAttribute from(SerializeFormat.DataValueXml proto) {
Map.Entry<String, String> attribute =
Iterables.getOnlyElement(proto.getAttributeMap().entrySet());
return new ResourcesAttribute(
AttributeType.valueOf(proto.getValueType()),
attribute.getKey(),
attribute.getValue());
}
private final AttributeType type;
private final String name;
private final String value;
private ResourcesAttribute(AttributeType type, String name, String value) {
this.type = type;
this.name = name;
this.value = value;
}
@Override
public void write(
FullyQualifiedName key, DataSource source, AndroidDataWritingVisitor mergedDataWriter) {
mergedDataWriter.defineAttribute(key, name, value);
}
@Override
public int serializeTo(int sourceId, Namespaces namespaces, OutputStream output)
throws IOException {
SerializeFormat.DataValue.Builder builder =
XmlResourceValues.newSerializableDataValueBuilder(sourceId);
DataValueXml.Builder xmlValueBuilder =
builder
.getXmlValueBuilder()
.putAllNamespace(namespaces.asMap())
.setType(SerializeFormat.DataValueXml.XmlType.RESOURCES_ATTRIBUTE)
.setValueType(type.name())
.putAttribute(name, value);
builder.setXmlValue(xmlValueBuilder);
return XmlResourceValues.serializeProtoDataValue(output, builder);
}
@Override
public int hashCode() {
return Objects.hash(type, name, value);
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof ResourcesAttribute)) {
return false;
}
ResourcesAttribute other = (ResourcesAttribute) obj;
return Objects.equals(type, other.type)
&& Objects.equals(name, other.name)
&& Objects.equals(value, other.value);
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("type", type)
.add("name", name)
.add("value", value)
.toString();
}
public boolean isCombining() {
return type.isCombining();
}
@Override
public XmlResourceValue combineWith(XmlResourceValue value) {
if (!(value instanceof ResourcesAttribute)) {
throw new IllegalArgumentException(value + "is not combinable with " + this);
}
ResourcesAttribute other = (ResourcesAttribute) value;
if (type == other.type && isCombining()) {
return new ResourcesAttribute(type, name, type.combiner.combine(this.value, other.value));
}
throw new IllegalArgumentException(value + "is not combinable with " + this);
}
@Override
public void writeResourceToClass(FullyQualifiedName key, AndroidResourceSymbolSink sink) {
// This is an xml attribute and does not have any java representation.
}
@Override
public String asConflictStringWith(DataSource source) {
if (value != null) {
return String.format(" %s (with value %s)", source.asConflictString(), value);
}
return source.asConflictString();
}
}
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