From bbe30c7875f67547ea9394d4e99b420ac22ef152 Mon Sep 17 00:00:00 2001
From: "Rafael H. Schloming" <rhs@apache.org>
Date: Wed, 16 Apr 2008 13:32:13 +0000
Subject: QPID-901: updates to the java client to use the 0-10 final spec
 instead of the 0-10 preview spec; this includes improvements to the codegen
 process as well as some modifications to the shared code path in the client
 to not lose per message state when consumers are closed.

git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk@648692 13f79535-47bb-0310-9956-ffa450edef68
---
 qpid/java/common/templating.py | 101 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 qpid/java/common/templating.py

(limited to 'qpid/java/common/templating.py')

diff --git a/qpid/java/common/templating.py b/qpid/java/common/templating.py
new file mode 100644
index 0000000000..832b7ecb9c
--- /dev/null
+++ b/qpid/java/common/templating.py
@@ -0,0 +1,101 @@
+
+class Parser:
+
+  def __init__(self, **kwargs):
+    self.output = ""
+    self.environ = {"out": self.parse}
+    for k, v in kwargs.items():
+      self.environ[k] = v
+    self.text = ""
+    self.level = 0
+    self.line = None
+
+  def action(self, actor):
+    text = self.text
+    self.text = ""
+    actor(text)
+
+  def out(self, text):
+    self.output += text
+
+  def prefix_lines(self, text):
+    return "%s%s" % ("\n"*(self.line - 1 - text.count("\n")), text)
+
+  def evaluate(self, text):
+    self.out(str(eval(self.prefix_lines(text), self.environ, self.environ)))
+
+  def execute(self, text):
+    exec self.prefix_lines(text) in self.environ, self.environ
+
+  def parse(self, input):
+    old_line = self.line
+    try:
+      state = self.start
+      self.line = 1
+      for ch in input:
+        state = state(ch)
+        if ch == "\n":
+          self.line += 1
+      if state == self.start:
+        self.action(self.out)
+      elif state == self.alnum:
+        self.action(self.evaluate)
+      else:
+        raise ParseError()
+    finally:
+      self.line = old_line
+
+  def start(self, ch):
+    if ch == "$":
+      return self.dollar
+    else:
+      self.text += ch
+      return self.start
+
+  def dollar(self, ch):
+    if ch == "$":
+      self.text += "$"
+      return self.start
+    elif ch == "(":
+      self.action(self.out)
+      return self.expression
+    elif ch == "{":
+      self.action(self.out)
+      return self.block
+    else:
+      self.action(self.out)
+      self.text += ch
+      return self.alnum
+
+  def alnum(self, ch):
+    if ch.isalnum():
+      self.text += ch
+      return self.alnum
+    else:
+      self.action(self.evaluate)
+      self.text += ch
+      return self.start
+
+  def match(self, ch, start, end):
+    if ch == start:
+      self.level += 1
+    if ch == end:
+      self.level -= 1
+
+  def block(self, ch):
+    if not self.level and ch == "}":
+      self.action(self.execute)
+      return self.start
+    else:
+      self.match(ch, "{", "}")
+      self.text += ch
+      return self.block
+
+  def expression(self, ch):
+    if not self.level and ch == ")":
+      self.action(self.evaluate)
+      return self.start
+    else:
+      self.match(ch, "(", ")")
+      self.text += ch
+      return self.expression
-- 
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