/*
* Copyright (C) 2008 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.gxp.compiler.java;
import static com.google.gxp.compiler.base.OutputLanguage.JAVA;
import com.google.common.collect.Lists;
import com.google.gxp.compiler.alerts.AlertSink;
import com.google.gxp.compiler.base.Expression;
import com.google.gxp.compiler.base.ExtractedMessage;
import com.google.gxp.compiler.base.Template;
import com.google.gxp.compiler.base.TemplateName;
import com.google.gxp.compiler.msgextract.MessageExtractedTree;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* A {@code CodeGenerator} which generates Java code in dynamic
* impl mode.
*/
public class DynamicImplJavaCodeGenerator extends JavaCodeGenerator {
private final long compilationVersion;
public DynamicImplJavaCodeGenerator(MessageExtractedTree tree,
long compilationVersion) {
super(tree, null);
this.compilationVersion = compilationVersion;
}
protected TemplateWorker createTemplateWorker(Appendable appendable,
AlertSink alertSink,
Template template,
String runtimeMessageSource) {
return new TemplateWorker(appendable, alertSink, template,
compilationVersion);
}
protected static class TemplateWorker
extends JavaCodeGenerator.TemplateWorker {
private final long compilationVersion;
TemplateWorker(Appendable appendable, AlertSink alertSink,
Template template, long compilationVersion) {
super(appendable, alertSink, template, null);
this.compilationVersion = compilationVersion;
}
@Override
public TemplateWorker createSubWorker(Appendable newAppendable) {
return new TemplateWorker(newAppendable, alertSink, template,
compilationVersion);
}
@Override
protected String getClassName(TemplateName templateName) {
return super.getClassName(templateName) + "$Impl" + compilationVersion;
}
@Override
protected String getBaseClassName() {
return "com.google.gxp.base.dynamic.ImplGxpTemplate";
}
private Pattern PARAM_PATTERN = Pattern.compile("%[1-9%]");
@Override
protected StatementVisitor getStatementVisitor() {
return new StatementVisitor();
}
private class StatementVisitor extends JavaCodeGenerator.TemplateWorker.StatementVisitor {
@Override
public Void visitExtractedMessage(ExtractedMessage msg) {
String org = msg.getTcMessage().getOriginal();
List<Expression> params = msg.getParameters();
List<String> paramVars = Lists.newArrayListWithExpectedSize(params.size());
for (Expression param : params) {
String varName = createVarName("ph");
paramVars.add(varName);
formatLine(param.getSourcePosition(),
"String %s = %s.INSTANCE.append(new StringBuilder(), gxp_context, %s)"
+ ".toString();",
varName, msg.getSchema().getJavaAppender(), getJavaExpression(param));
}
Matcher m = PARAM_PATTERN.matcher(org);
int start = 0;
while (m.find(start)) {
if (m.start() != start) {
writeString(msg.getSourcePosition(), org.substring(start, m.start()));
}
String s = m.group().substring(1);
if (s.equals("%")) {
writeString(msg.getSourcePosition(), "%");
} else {
String var = paramVars.get(Integer.parseInt(s) - 1);
writeExpression(msg.getSourcePosition(), var);
}
start = m.end();
}
if (org.length() > start) {
writeString(msg.getSourcePosition(), org.substring(start));
}
return null;
}
}
@Override
protected ToEscapableExpressionVisitor getToEscapableExpressionVisitor() {
return new ToEscapableExpressionVisitor();
}
private class ToEscapableExpressionVisitor
extends JavaCodeGenerator.TemplateWorker.ToEscapableExpressionVisitor {
@Override
public String visitExtractedMessage(ExtractedMessage msg) {
StringBuilder sb = new StringBuilder("formatGxpMessage(");
sb.append(JAVA.toStringLiteral(msg.getTcMessage().getOriginal()));
for (Expression param : msg.getParameters()) {
sb.append(", ");
sb.append(msg.getSchema().getJavaAppender());
sb.append(".INSTANCE.append(new StringBuilder(), gxp_context, ");
sb.append(getJavaExpression(param));
sb.append(").toString()");
}
sb.append(')');
return sb.toString();
}
}
@Override
protected void appendGetArgListMethod() {
// Impl classes don't need this functionality
}
@Override
protected void appendGetGxpClosureMethod(boolean isStatic) {
// Impl classes don't need this functionality
}
@Override
protected void appendInterface() {
// Impl classes don't need this functionality
}
@Override
protected void appendInstance() {
// Impl classes don't need this functionality
}
}
}