protected JRCompilationSourceCode generateClass() throws JRException {
StringBuffer sb = new StringBuffer();
generateClassStart(sb);
generateDeclarations(sb);
generateInitMethod(sb);
generateInitParamsMethod(sb);
if (fieldsMap != null) {
generateInitFieldsMethod(sb);
}
generateInitVarsMethod(sb);
List<JRExpression> expressions = sourceTask.getExpressions();
sb.append(generateMethod(JRExpression.EVALUATION_DEFAULT, expressions));
if (sourceTask.isOnlyDefaultEvaluation()) {
List<JRExpression> empty = new ArrayList<JRExpression>();
sb.append(generateMethod(JRExpression.EVALUATION_OLD, empty));
sb.append(generateMethod(JRExpression.EVALUATION_ESTIMATED, empty));
} else {
sb.append(generateMethod(JRExpression.EVALUATION_OLD, expressions));
sb.append(generateMethod(JRExpression.EVALUATION_ESTIMATED, expressions));
}
sb.append("}\n");
String code = sb.toString();
JRExpression[] lineExpressions = parseSourceLines(code);
return new JRDefaultCompilationSourceCode(code, lineExpressions);
}
protected JRClassGenerator(JRSourceCompileTask sourceTask) {
this.sourceTask = sourceTask;
parametersMap = sourceTask.getParametersMap();
fieldsMap = sourceTask.getFieldsMap();
variablesMap = sourceTask.getVariablesMap();
variables = sourceTask.getVariables();
}
protected final void generateClassStart(StringBuffer sb) {
sb.append("/*\n");
sb.append(" * Generated by JasperReports - ");
sb.append((new SimpleDateFormat()).format(new java.util.Date()));
sb.append("\n");
sb.append(" */\n");
sb.append("import net.sf.jasperreports.engine.*;\n");
sb.append("import net.sf.jasperreports.engine.fill.*;\n");
sb.append("\n");
sb.append("import java.util.*;\n");
sb.append("import java.math.*;\n");
sb.append("import java.text.*;\n");
sb.append("import java.io.*;\n");
sb.append("import java.net.*;\n");
sb.append("\n");
/* */
String[] imports = sourceTask.getImports();
if (imports != null && imports.length > 0) {
for (int i = 0; i < imports.length; i++) {
sb.append("import ");
sb.append(imports[i]);
sb.append(";\n");
}
}
/* */
sb.append("\n");
sb.append("\n");
sb.append("/**\n");
sb.append(" *\n");
sb.append(" */\n");
sb.append("public class ");
sb.append(sourceTask.getUnitName());
sb.append(" extends JREvaluator\n");
sb.append("{\n");
sb.append("\n");
sb.append("\n");
sb.append(" /**\n");
sb.append(" *\n");
sb.append(" */\n");
}
protected JRExpression getLineExpression(String line) {
JRExpression expression = null;
int exprIdStart = line.indexOf(SOURCE_EXPRESSION_ID_START);
if (exprIdStart >= 0) {
exprIdStart += SOURCE_EXPRESSION_ID_START_LENGTH;
int exprIdEnd = line.indexOf('$', exprIdStart);
if (exprIdEnd >= 0) {
try {
int exprId = Integer.parseInt(line.substring(exprIdStart, exprIdEnd));
expression = sourceTask.getExpression(exprId);
} catch (NumberFormatException e) {
// ignore
}
}
}
return expression;
}
protected void appendExpressionComment(StringBuffer sb, JRExpression expression) {
sb.append(" //");
sb.append(SOURCE_EXPRESSION_ID_START);
sb.append(sourceTask.getExpressionId(expression));
sb.append(SOURCE_EXPRESSION_ID_END);
}
private String generateMethod(Iterator<JRExpression> it, int index, byte evaluationType)
throws JRException {
StringBuffer sb = new StringBuffer();
/* */
sb.append(" /**\n");
sb.append(" *\n");
sb.append(" */\n");
if (index > 0) {
sb.append(" private Object evaluate");
sb.append(methodSuffixMap.get(new Byte(evaluationType)));
sb.append(index);
} else {
sb.append(" public Object evaluate");
sb.append(methodSuffixMap.get(new Byte(evaluationType)));
}
sb.append("(int id) throws Throwable\n");
sb.append(" {\n");
sb.append(" Object value = null;\n");
sb.append("\n");
sb.append(" switch (id)\n");
sb.append(" {\n");
for (int i = 0; it.hasNext() && i < EXPR_MAX_COUNT_PER_METHOD; i++) {
JRExpression expression = it.next();
sb.append(" case ");
sb.append(sourceTask.getExpressionId(expression));
sb.append(" : \n");
sb.append(" {\n");
sb.append(" value = ");
sb.append(this.generateExpression(expression, evaluationType));
sb.append(";");
appendExpressionComment(sb, expression);
sb.append("\n");
sb.append(" break;\n");
sb.append(" }\n");
}
/* */
sb.append(" default :\n");
sb.append(" {\n");
if (it.hasNext()) {
sb.append(" value = evaluate");
sb.append(methodSuffixMap.get(new Byte(evaluationType)));
sb.append(index + 1);
sb.append("(id);\n");
}
sb.append(" }\n");
sb.append(" }\n");
sb.append(" \n");
sb.append(" return value;\n");
sb.append(" }\n");
sb.append("\n");
sb.append("\n");
if (it.hasNext()) {
sb.append(generateMethod(it, index + 1, evaluationType));
}
return sb.toString();
}