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+/* MethodGenerator.java -- Generates methods for GIOP rmic compiler.
+ Copyright (C) 2006 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+*/
+
+package gnu.classpath.tools.rmic;
+
+import gnu.classpath.tools.rmic.AbstractMethodGenerator;
+
+import java.lang.reflect.Method;
+import java.util.Properties;
+
+/**
+ * Keeps information about the single method and generates the code fragments,
+ * related to that method.
+ *
+ * @author Audrius Meskauskas, Lithuania (audriusa@Bioinformatics.org)
+ */
+public class MethodGenerator implements AbstractMethodGenerator
+{
+ /**
+ * The method being defined.
+ */
+ Method method;
+
+ /**
+ * The parent code generator.
+ */
+ SourceGiopRmicCompiler rmic;
+
+ /**
+ * The previous method in the list, null for the first element.
+ * Used to avoid repretetive inclusion of the same hash code label.
+ */
+ MethodGenerator previous = null;
+
+ /**
+ * The hash character position.
+ */
+ int hashCharPosition;
+
+ /**
+ * Create the new method generator for the given method.
+ *
+ * @param aMethod
+ * the related method.
+ * @param aRmic
+ * the Rmic generator instance, where more class - related
+ * information is defined.
+ */
+ public MethodGenerator(Method aMethod, SourceGiopRmicCompiler aRmic)
+ {
+ method = aMethod;
+ rmic = aRmic;
+ }
+
+ /**
+ * Get the method name.
+ *
+ * @return the name of the method.
+ */
+ public String getGiopMethodName()
+ {
+ String m = method.getName();
+ if (m.startsWith("get"))
+ return "_get_J" + m.substring("get".length());
+ else if (m.startsWith("set"))
+ return "_set_J" + m.substring("set".length());
+ else
+ return m;
+ }
+
+ /**
+ * Get the method parameter declaration.
+ *
+ * @return the string - method parameter declaration.
+ */
+ public String getArgumentList()
+ {
+ StringBuffer b = new StringBuffer();
+
+ Class[] args = method.getParameterTypes();
+
+ for (int i = 0; i < args.length; i++)
+ {
+ b.append(rmic.name(args[i]));
+ b.append(" p" + i);
+ if (i < args.length - 1)
+ b.append(", ");
+ }
+ return b.toString();
+ }
+
+ /**
+ * Get the method parameter list only (no type declarations). This is used to
+ * generate the method invocations statement.
+ *
+ * @return the string - method parameter list.
+ */
+ public String getArgumentNames()
+ {
+ StringBuffer b = new StringBuffer();
+
+ Class[] args = method.getParameterTypes();
+
+ for (int i = 0; i < args.length; i++)
+ {
+ b.append(" p" + i);
+ if (i < args.length - 1)
+ b.append(", ");
+ }
+ return b.toString();
+ }
+
+ /**
+ * Get the list of exceptions, thrown by this method.
+ *
+ * @return the list of exceptions.
+ */
+ public String getThrows()
+ {
+ StringBuffer b = new StringBuffer();
+
+ Class[] args = method.getExceptionTypes();
+
+ for (int i = 0; i < args.length; i++)
+ {
+ b.append(rmic.name(args[i]));
+ if (i < args.length - 1)
+ b.append(", ");
+ }
+ return b.toString();
+ }
+
+ /**
+ * Generate this method for the Stub class.
+ *
+ * @return the method body for the stub class.
+ */
+ public String generateStubMethod()
+ {
+ String templateName;
+
+ Properties vars = new Properties(rmic.vars);
+ vars.put("#return_type", rmic.name(method.getReturnType()));
+ vars.put("#method_name", method.getName());
+ vars.put("#giop_method_name", getGiopMethodName());
+ vars.put("#argument_list", getArgumentList());
+ vars.put("#argument_names", getArgumentNames());
+
+ vars.put("#argument_write", getStubParaWriteStatement());
+
+ if (method.getReturnType().equals(void.class))
+ vars.put("#read_return", "return;");
+ else
+ vars.put("#read_return",
+ "return "
+ + GiopIo.getReadStatement(method.getReturnType(), rmic));
+ String thr = getThrows();
+ if (thr.length() > 0)
+ vars.put("#throws", "\n throws " + thr);
+ else
+ vars.put("#throws", "");
+
+ if (method.getReturnType().equals(void.class))
+ templateName = "StubMethodVoid.jav";
+ else
+ {
+ vars.put("#write_result",
+ GiopIo.getWriteStatement(method.getReturnType(), "result",
+ rmic));
+ templateName = "StubMethod.jav";
+ }
+
+ String template = rmic.getResource(templateName);
+ String generated = rmic.replaceAll(template, vars);
+ return generated;
+ }
+
+ /**
+ * Generate this method handling fragment for the Tie class.
+ *
+ * @return the fragment to handle this method for the Tie class.
+ */
+ public String generateTieMethod()
+ {
+ String templateName;
+
+ Properties vars = new Properties(rmic.vars);
+ vars.put("#return_type", rmic.name(method.getReturnType()));
+ vars.put("#method_name", method.getName());
+ vars.put("#giop_method_name", getGiopMethodName());
+ vars.put("#argument_list", getArgumentList());
+ vars.put("#argument_names", getArgumentNames());
+
+ vars.put("#argument_write", getStubParaWriteStatement());
+
+ if (previous == null || previous.getHashChar()!=getHashChar())
+ vars.put("#hashCodeLabel"," case '"+getHashChar()+"':");
+ else
+ vars.put("#hashCodeLabel"," // also '"+getHashChar()+"':");
+
+ if (method.getReturnType().equals(void.class))
+ templateName = "TieMethodVoid.jav";
+ else
+ {
+ vars.put("#write_result",
+ GiopIo.getWriteStatement(method.getReturnType(), "result",
+ rmic));
+ templateName = "TieMethod.jav";
+ }
+ vars.put("#read_and_define_args", getRda());
+
+ String template = rmic.getResource(templateName);
+ String generated = rmic.replaceAll(template, vars);
+ return generated;
+ }
+
+ /**
+ * Generate sentences for Reading and Defining Arguments.
+ *
+ * @return the sequence of sentences for reading and defining arguments.
+ */
+ public String getRda()
+ {
+ StringBuffer b = new StringBuffer();
+ Class[] args = method.getParameterTypes();
+
+ for (int i = 0; i < args.length; i++)
+ {
+ b.append(" ");
+ b.append(rmic.name(args[i]));
+ b.append(" ");
+ b.append("p"+i);
+ b.append(" = ");
+ b.append(GiopIo.getReadStatement(args[i], rmic));
+ if (i<args.length-1)
+ b.append("\n");
+ }
+ return b.toString();
+ }
+
+ /**
+ * Get the write statement for writing parameters inside the stub.
+ *
+ * @return the write statement.
+ */
+ public String getStubParaWriteStatement()
+ {
+ StringBuffer b = new StringBuffer();
+ Class[] args = method.getParameterTypes();
+
+ for (int i = 0; i < args.length; i++)
+ {
+ b.append(" ");
+ b.append(GiopIo.getWriteStatement(args[i], "p" + i, rmic));
+ b.append("\n");
+ }
+ return b.toString();
+ }
+
+ /**
+ * Get the hash char.
+ */
+ public char getHashChar()
+ {
+ return getGiopMethodName().charAt(hashCharPosition);
+ }
+}