/*
* Copyright 2012 Google Inc.
*
* 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.template.soy.basicfunctions;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableSet;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.google.template.soy.data.SoyData;
import com.google.template.soy.data.SoyMapData;
import com.google.template.soy.data.internal.AugmentedSoyMapData;
import com.google.template.soy.jssrc.restricted.JsExpr;
import com.google.template.soy.jssrc.restricted.SoyJsSrcFunction;
import com.google.template.soy.shared.restricted.SoyPureFunction;
import com.google.template.soy.tofu.restricted.SoyAbstractTofuFunction;
import java.util.List;
import java.util.Set;
/**
* Soy function that creates a new map equivalent to augmenting an existing map with additional
* mappings.
*
* @author Kai Huang
*/
@Singleton
@SoyPureFunction
class AugmentMapFunction extends SoyAbstractTofuFunction implements SoyJsSrcFunction {
@Inject
AugmentMapFunction() {}
@Override public String getName() {
return "augmentMap";
}
@Override public Set<Integer> getValidArgsSizes() {
return ImmutableSet.of(2);
}
@Override public SoyData compute(List<SoyData> args) {
SoyData arg0 = args.get(0);
SoyData arg1 = args.get(1);
Preconditions.checkArgument(arg0 instanceof SoyMapData,
"First argument to augmentMap() function is not SoyMapData.");
Preconditions.checkArgument(arg1 instanceof SoyMapData,
"Second argument to augmentMap() function is not SoyMapData.");
AugmentedSoyMapData augmentedMap = new AugmentedSoyMapData((SoyMapData) arg0);
SoyMapData additionalMap = (SoyMapData) arg1;
for (String key : additionalMap.getKeys()) {
augmentedMap.putSingle(key, additionalMap.getSingle(key));
}
return augmentedMap;
}
@Override public JsExpr computeForJsSrc(List<JsExpr> args) {
JsExpr arg0 = args.get(0);
JsExpr arg1 = args.get(1);
String exprText = "soy.$$augmentMap(" + arg0.getText() + ", " + arg1.getText() + ")";
return new JsExpr(exprText, Integer.MAX_VALUE);
}
}