Examples of org.stringtemplate.v4.STGroup

org.stringtemplate.v4.STGroup
A directory or directory tree of .st template files and/or group files. Individual template files contain formal template definitions. In a sense, it's like a single group file broken into multiple files, one for each template. ST v3 had just the pure template inside, not the template name and header. Name inside must match filename (minus suffix).


    String dir = getRandomDir();
    writeFile(dir, "GenerateHtml.stg", groupFile);
    writeFile(dir, "HtmlTemplates.stg", htmlFile);


    STGroup group = new STGroupFile(dir + "/GenerateHtml.stg");


    // test html template directly
    ST st = group.getInstanceOf("html");
    Assert.assertNotNull(st);
    String expected = "<table style=\"stuff\">";
    String result = st.render();
    assertEquals(expected, result);


    // test from entry template
    st = group.getInstanceOf("entry");
    Assert.assertNotNull(st);
    expected = "<table style=\"stuff\">";
    result = st.render();
    assertEquals(expected, result);
  }

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        "list(a,b) ::= <<" +
        "  <a><b>"+newline+
        ">>"+newline;


    writeFile(tmpdir, "t.stg", templates);
    STGroup group = new STGroupFile(tmpdir+"/"+"t.stg");
    ST t = group.getInstanceOf("list");
    t.impl.dump();
    t.add("a", "Terence");
    t.add("b", "Jim");
    String expecting =
        "  TerenceJim";

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        "list(names) ::= <<" +
        "  <names; separator=\"\\n\">"+newline+
        ">>"+newline;


    writeFile(tmpdir, "t.stg", templates);
    STGroup group = new STGroupFile(tmpdir+"/"+"t.stg");
    ST t = group.getInstanceOf("list");
    t.add("names", "Terence");
    t.add("names", "Jim");
    t.add("names", "Sriram");
    String expecting =
        "  Terence"+newline+

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    String templates =
        "list(names) ::= <<" +
        "  <names; separator=\"\n\">"+newline+
        ">>"+newline;
    writeFile(tmpdir, "t.stg", templates);
    STGroup group = new STGroupFile(tmpdir+"/"+"t.stg");
    ST t = group.getInstanceOf("list");
    t.add("names", "Terence\nis\na\nmaniac");
    t.add("names", "Jim");
    t.add("names", "Sriram\nis\ncool");
    String expecting =
        "  Terence"+newline+

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    String templates =
        "list(names) ::= <<" +
        "  <names>"+newline+
        ">>"+newline;
    writeFile(tmpdir, "t.stg", templates);
    STGroup group = new STGroupFile(tmpdir+"/"+"t.stg");
    ST t = group.getInstanceOf("list");
    t.add("names", "Terence\n\nis a maniac");
    String expecting =
        "  Terence"+newline+
        ""+newline+ // no indent on blank line
        "  is a maniac";

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        "Before:"+newline +
        "  <names; separator=\"\\n\">"+newline+
        "after" +newline+
        ">>"+newline;
    writeFile(tmpdir, "t.stg", templates);
    STGroup group = new STGroupFile(tmpdir+"/"+"t.stg");
    ST t = group.getInstanceOf("list");
    t.add("names", "Terence");
    t.add("names", "Jim");
    t.add("names", "Sriram");
    String expecting =
        "Before:" +newline+

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        "}" +
        ">>"+newline +
        "assign(lhs,expr) ::= \"<lhs>=<expr>;\""+newline
        ;
    writeFile(tmpdir, "t.stg", templates);
    STGroup group = new STGroupFile(tmpdir+"/"+"t.stg");
    ST t = group.getInstanceOf("method");
    t.add("name", "foo");
    ST s1 = group.getInstanceOf("assign");
    s1.add("lhs", "x");
    s1.add("expr", "0");
    ST s2 = group.getInstanceOf("ifstat");
    s2.add("expr", "x>0");
    ST s2a = group.getInstanceOf("assign");
    s2a.add("lhs", "y");
    s2a.add("expr", "x+y");
    ST s2b = group.getInstanceOf("assign");
    s2b.add("lhs", "z");
    s2b.add("expr", "4");
    s2.add("stats", s2a);
    s2.add("stats", s2b);
    t.add("stats", s1);

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    String result = t.render();
    assertEquals(expecting, result);
  }


  @Test public void testIndentedIFWithNewlineBeforeText() throws Exception {
    STGroup group = new STGroup();
    group.defineTemplate("t", "x",
      "begin"+newline+
      "    <if(x)>\n" +
      "foo\n" +  // no indent; ignore IF indent
      "    <endif>"+newline+    // ignore indent on if-tags on line by themselves
      "end"+newline);
    ST t = group.getInstanceOf("t");
    t.add("x", "x");
    String expecting="begin"+newline+"foo"+newline+"end";
    String result = t.render();
    assertEquals(expecting, result);
  }

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    String result = t.render();
    assertEquals(expecting, result);
  }


  @Test public void testIndentedIFWithEndifNextLine() throws Exception {
    STGroup group = new STGroup();
    group.defineTemplate("t", "x",
      "begin"+newline+
      "    <if(x)>foo\n" +      // use indent and keep newline
      "    <endif>"+newline+    // ignore indent on if-tags on line by themselves
      "end"+newline);
    ST t = group.getInstanceOf("t");
    t.add("x", "x");
    String expecting="begin"+newline+"    foo"+newline+"end";
    String result = t.render();
    assertEquals(expecting, result);
  }

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  public void testEarlyEval() throws Exception {
    String templates = "main() ::= <<\n<f(p=\"x\")>*<f(p=\"y\")>\n>>\n\n"
        + "f(p,q={<({a<p>})>}) ::= <<\n-<q>-\n>>";
    writeFile(tmpdir, "t.stg", templates);


    STGroup group = new STGroupFile(tmpdir + "/t.stg");


    ST st = group.getInstanceOf("main");


    String s = st.render();
    Assert.assertEquals("-ax-*-ay-", s);


    // Calling inspect led to an java.lang.ArrayIndexOutOfBoundsException in

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