Examples of org.apache.openjpa.lib.util.CodeFormat

org.apache.openjpa.lib.util.CodeFormat
Encapsulates some common Java source code formatting options. The class can also be used as a buffer for formatted Java code. @author Abe White


    /**
     * Get parsing code for the given field.
     */
    private String getConversionCode(FieldMetaData field, String var) {
        CodeFormat parse = newCodeFormat();
        if (field.getName().equals(var))
            parse.append("this.");
        parse.append(field.getName()).append(" = ");


        Class type = field.getObjectIdFieldType();
        if (type == Date.class) {
            parse.append("new Date").openParen(true).
                append("Long.parseLong").openParen(true).
                append(var).closeParen().closeParen();
        } else if (type == java.sql.Date.class
            || type == java.sql.Timestamp.class
            || type == java.sql.Time.class) {
            parse.append(type.getName()).append(".valueOf").openParen(true).
                append(var).closeParen();
        } else if (type == String.class)
            parse.append(var);
        else if (type == Character.class) {
            parse.append("new Character").openParen(true).append(var).
                append(".charAt").openParen(true).append(0).
                closeParen().closeParen();
        } else if (type == byte[].class)
            parse.append("toBytes").openParen(true).append(var).closeParen();
        else if (type == char[].class)
            parse.append(var).append(".toCharArray").parens();
        else if (!type.isPrimitive()) {
            parse.append("new ").append(Strings.getClassName(type)).
                openParen(true).append(var).closeParen();
        } else // primitive
        {
            switch (type.getName().charAt(0)) {
                case 'b':
                    if (type == boolean.class)
                        parse.append("\"true\".equals").openParen(true).
                            append(var).closeParen();
                    else
                        parse.append("Byte.parseByte").openParen(true).
                            append(var).closeParen();
                    break;
                case 'c':
                    parse.append(var).append(".charAt").openParen(true).
                        append(0).closeParen();
                    break;
                case 'd':
                    parse.append("Double.parseDouble").openParen(true).
                        append(var).closeParen();
                    break;
                case 'f':
                    parse.append("Float.parseFloat").openParen(true).
                        append(var).closeParen();
                    break;
                case 'i':
                    parse.append("Integer.parseInt").openParen(true).
                        append(var).closeParen();
                    break;
                case 'l':
                    parse.append("Long.parseLong").openParen(true).
                        append(var).closeParen();
                    break;
                case 's':
                    parse.append("Short.parseShort").openParen(true).
                        append(var).closeParen();
                    break;
            }
        }


        if (!type.isPrimitive() && type != byte[].class) {
            CodeFormat isNull = newCodeFormat();
            isNull.append("if").openParen(true).append("\"null\".equals").
                openParen(true).append(var).closeParen().closeParen().
                endl().tab(3);
            if (field.getName().equals(var))
                isNull.append("this.");
            isNull.append(field.getName()).append(" = null;").endl();
            isNull.tab(2).append("else").endl();
            isNull.tab(3).append(parse);
            parse = isNull;
        }


        return parse.append(";").toString();
    }

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        // if we are below a concrete class then we cannot declare any
        // more primary key fields; thus, just use the parent invocation
        if (hasConcreteSuperclass() || (hasSuperclass && _fields.length == 0))
            return "";


        CodeFormat code = newCodeFormat();
        code.tab().append("public boolean equals").openParen(true).
            append("Object obj").closeParen().openBrace(2).endl();


        code.tab(2).append("if").openParen(true).
            append("this == obj").closeParen().endl();
        code.tab(3).append("return true;").endl();


        // call super.equals() if we have a superclass
        String className = getClassName();
        if (hasSuperclass) {
            code.tab(2).append("if").openParen(true).
                append("!super.equals").openParen(true).
                append("obj").closeParen().closeParen().endl();
            code.tab(3).append("return false;").endl();
        } else {
            code.tab(2).append("if").openParen(true).
                append("obj == null || obj.getClass").parens().
                append(" != ").append("getClass").parens().
                closeParen().endl();
            code.tab(3).append("return false;").endl();
        }


        String name;
        Class type;
        for (int i = 0; i < _fields.length; i++) {
            if (i == 0) {
                code.endl().tab(2).append(className).append(" other = ").
                    openParen(false).append(className).closeParen().
                    append(" obj;").endl();
            }


            // if this is not the first field, add an &&
            if (i == 0)
                code.tab(2).append("return ");
            else
                code.endl().tab(3).append("&& ");


            name = _fields[i].getName();
            type = _fields[i].getObjectIdFieldType();
            if (type.isPrimitive()) {
                code.openParen(false).append(name).append(" == ").
                    append("other.").append(name).closeParen();
            } else if (type == byte[].class) {
                code.openParen(false).append("equals").openParen(true).
                    append(name).append(", ").append("other.").
                    append(name).closeParen().closeParen();
            } else if (type == char[].class) {
                // ((name == null && other.name == null)
                //  || (name != null && String.valueOf (name).
                //  equals (String.valueOf (other.name))))
                code.append("(").openParen(false).append(name).
                    append(" == null && other.").append(name).
                    append(" == null").closeParen().endl();
                code.tab(3).append("|| ");
                code.openParen(false).append(name).append(" != null ").
                    append("&& String.valueOf").openParen(true).append(name).
                    closeParen().append(".").endl();
                code.tab(3).append("equals").openParen(true).
                    append("String.valueOf").openParen(true).
                    append("other.").append(name).closeParen().closeParen().
                    closeParen().append(")");
            } else {
                // ((name == null && other.name == null)
                //  || (name != null && name.equals (other.name)))
                code.append("(").openParen(false).append(name).
                    append(" == null && other.").append(name).
                    append(" == null").closeParen().endl();
                code.tab(3).append("|| ");
                code.openParen(false).append(name).append(" != null ").
                    append("&& ").append(name).append(".equals").
                    openParen(true).append("other.").append(name).
                    closeParen().closeParen().append(")");
            }
        }


        // no _fields: just return true after checking instanceof
        if (_fields.length == 0)
            code.tab(2).append("return true;").endl();
        else
            code.append(";").endl();


        code.closeBrace(2);
        return code.toString();
    }

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        // if we are below a concrete class then we cannot declare any
        // more primary key fields; thus, just use the parent invocation
        if (hasConcreteSuperclass() || (hasSuperclass && _fields.length == 0))
            return "";


        CodeFormat code = newCodeFormat();
        code.tab().append("public int hashCode").parens().
            openBrace(2).endl();


        if (_fields.length == 0)
            code.tab(2).append("return 17;").endl();
        else if (_fields.length == 1 && !hasSuperclass) {
            code.tab(2).append("return ");
            appendHashCodeCode(_fields[0], code);
            code.append(";").endl();
        } else {
            code.tab(2).append("int rs = ");
            if (hasSuperclass) {
                // call super.hashCode() if we have a superclass
                code.append("super.hashCode").openParen(true).
                    closeParen().append(";");
            } else
                code.append("17;");
            code.endl();


            for (int i = 0; i < _fields.length; i++) {
                code.tab(2).append("rs = rs * 37 + ");
                appendHashCodeCode(_fields[i], code);
                code.append(";").endl();
            }
            code.tab(2).append("return rs;").endl();
        }
        code.closeBrace(2);
        return code.toString();
    }

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        // if we are below a concrete class then we cannot declare any
        // more primary key fields; thus, just use the parent invocation
        if (hasConcreteSuperclass() || (hasSuperclass && _fields.length == 0))
            return "";


        CodeFormat code = newCodeFormat();
        code.tab().append("public String toString").parens().
            openBrace(2).endl();


        String name;
        Class type;
        String appendDelimiter = "+ \"" + _token + "\" + ";
        for (int i = 0; i < _fields.length; i++) {
            // if this is not the first field, add a +
            if (i == 0) {
                code.tab(2).append("return ");


                // add in the super.toString() if we have a parent
                if (hasSuperclass && getDeclaredPrimaryKeyFields
                    (_meta.getPCSuperclassMetaData()).length > 0) {
                    code.append("super.toString").parens();
                    code.endl().tab(3).append(appendDelimiter);
                }
            } else
                code.endl().tab(3).append(appendDelimiter);


            name = _fields[i].getName();
            type = _fields[i].getObjectIdFieldType();
            if (type == String.class)
                code.append(name);
            else if (type == byte[].class)
                code.append("toString").openParen(true).
                    append(name).closeParen();
            else if (type == char[].class)
                code.openParen(true).openParen(true).append(name).
                    append(" == null").closeParen().append(" ? \"null\"").
                    append(": String.valueOf").openParen(true).
                    append(name).closeParen().closeParen();
            else if (type == Date.class)
                code.openParen(true).openParen(true).append(name).
                    append(" == null").closeParen().append(" ? \"null\"").
                    endl().tab(4).append(": String.valueOf").
                    openParen(true).append(name).append(".getTime").
                    parens().closeParen().closeParen();
            else
                code.append("String.valueOf").openParen(true).
                    append(name).closeParen();
        }


        // no fields; just use ""
        if (_fields.length == 0)
            code.tab(2).append("return \"\"");
        code.append(";").endl();
        code.closeBrace(2);
        return code.toString();
    }

View Full Code Here

        String toStringCode = getToStringCode(superOidClass != null);
        String equalsCode = getEqualsCode(superOidClass != null);
        String hashCodeCode = getHashCodeCode(superOidClass != null);


        // build the java code
        CodeFormat code = newCodeFormat();
        if (!isInnerClass() && packageDec.length() > 0)
            code.append(packageDec).afterSection();


        if (!isInnerClass() && imports.length() > 0)
            code.append(imports).afterSection();


        code.append("/**").endl().
            append(" * ").
            append(_loc.get("appid-comment-for", _type.getName())).
            endl().
            append(" *").endl().
            append(" * ").append(_loc.get("appid-comment-gen")).endl().
            append(" * ").append(getClass().getName()).endl().
            append(" */").endl();
        code.append("public ");
        if (isInnerClass())
            code.append("static ");
        code.append("class ").append(className);
        if (code.getBraceOnSameLine())
            code.append(" ");
        else
            code.endl().tab();


        if (superOidClass != null) {
            code.append("extends " + Strings.getClassName(superOidClass));
            if (code.getBraceOnSameLine())
                code.append(" ");
            else
                code.endl().tab();
        }
        code.append("implements Serializable").openBrace(1).endl();


        // if we use a byte array we need a static array for encoding to string
        if (bytes) {
            code.tab().append("private static final char[] HEX = ").
                append("new char[] {").endl();
            code.tab(2).append("'0', '1', '2', '3', '4', '5', '6', '7',").
                endl();
            code.tab(2).append("'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'").
                endl();
            code.tab().append("};").endl(2);
        }


        // static block to register class
        code.tab().append("static").openBrace(2).endl();
        code.tab(2).append("// register persistent class in JVM").endl();
        code.tab(2).append("try { Class.forName").openParen(true).
                append("\"").append(_type.getName()).append("\"").
                closeParen().append(";").append(" }").endl();
        code.tab(2).append("catch").openParen(true).
                append("Exception e").closeParen().append(" {}").endl();
        
        code.closeBrace(2);


        // field declarations
        if (fieldDecs.length() > 0)
            code.endl(2).append(fieldDecs);


        // default constructor
        code.afterSection().tab().append("public ").append(className).
            parens().openBrace(2).endl();
        code.closeBrace(2);


        // string constructor
        code.afterSection().append(constructor);


        // properties
        if (properties.length() > 0)
            code.afterSection().append(properties);


        // toString, equals, hashCode methods
        if (toStringCode.length() > 0)
            code.afterSection().append(toStringCode);
        if (hashCodeCode.length() > 0)
            code.afterSection().append(hashCodeCode);
        if (equalsCode.length() > 0)
            code.afterSection().append(equalsCode);
        if (fromStringCode.length() > 0)
            code.afterSection().append(fromStringCode);


        // if we have any byte array fields, we have to add the extra
        // methods for handling byte arrays
        if (bytes) {
            code.afterSection().append(getToBytesByteArrayCode());
            code.afterSection().append(getToStringByteArrayCode());
            code.afterSection().append(getEqualsByteArrayCode());
            code.afterSection().append(getHashCodeByteArrayCode());
        }


        // base classes might need to define a custom tokenizer
        if (superOidClass == null && getTokenizer(false) == TOKENIZER_CUSTOM)
            code.afterSection().append(getCustomTokenizerClass());


        code.endl();
        code.closeBrace(1);


        _code = code.toString();


        // if this is an inner class, then indent the entire
        // code unit one tab level
        if (isInnerClass()) {
            // indent the entire code block one level to make it
            // a propertly indented innder class
            _code = code.getTab() + Strings.replace(_code,
                J2DoPrivHelper.getLineSeparator(),
                J2DoPrivHelper.getLineSeparator() + code.getTab());
        }


        return true;
    }

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     * Return the necessary imports for the class.
     */
    private String getImports() {
        Set pkgs = getImportPackages();


        CodeFormat imports = newCodeFormat();
        String base = Strings.getPackageName(_meta.getObjectIdType());
        String pkg;
        for (Iterator itr = pkgs.iterator(); itr.hasNext();) {
            pkg = (String) itr.next();
            if (pkg.length() > 0 && !"java.lang".equals(pkg)
                && !base.equals(pkg)) {
                if (imports.length() > 0)
                    imports.endl();
                imports.append("import ").append(pkg).append(".*;");
            }
        }
        return imports.toString();
    }

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    /**
     * Return the code to declare all primary key fields.
     */
    private String getFieldDeclarations() {
        CodeFormat code = newCodeFormat();
        for (int i = 0; i < _fields.length; i++) {
            if (i > 0)
                code.endl();
            code.tab().append("public ").append(getTypeName(_fields[i])).
                append(" ").append(_fields[i].getName()).append(";");
        }
        return code.toString();
    }

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    private String getProperties() {
        if (AccessCode.isExplicit(_meta.getAccessType()) 
         && AccessCode.isField(_meta.getAccessType()))
            return "";


        CodeFormat code = newCodeFormat();
        String propName;
        String typeName;
        for (int i = 0; i < _fields.length; i++) {
            if (i > 0)
                code.afterSection();
            typeName = getTypeName(_fields[i]);
            propName = StringUtils.capitalize(_fields[i].getName());


            code.tab().append("public ").append(typeName).append(" ");
            if (_fields[i].getDeclaredTypeCode() == JavaTypes.BOOLEAN
                || _fields[i].getDeclaredTypeCode() == JavaTypes.BOOLEAN_OBJ)
                code.append("is");
            else
                code.append("get");
            code.append(propName).parens().openBrace(2).endl();
            code.tab(2).append("return ").append(_fields[i].getName()).
                append(";").endl();
            code.closeBrace(2);
            code.afterSection();


            code.tab().append("public void set").append(propName);
            code.openParen(true).append(typeName).append(" ").
                append(_fields[i].getName()).closeParen();
            code.openBrace(2).endl();
            code.tab(2).append("this.").append(_fields[i].getName()).
                append(" = ").append(_fields[i].getName()).append(";").
                endl();
            code.closeBrace(2);
        }
        return code.toString();
    }

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    /**
     * Return the string constructor code.
     */
    private String getConstructor(boolean hasSuperclass) {
        CodeFormat code = newCodeFormat();
        code.tab().append("public ");
        code.append(getClassName());
        code.openParen(true).append("String str").closeParen();
        code.openBrace(2).endl();


        if (_fields.length != 0 || (hasSuperclass
            && _meta.getPrimaryKeyFields().length > 0)) {
            code.tab(2).append("fromString").openParen(true).
                append("str").closeParen().append(";").endl();
        }


        code.closeBrace(2);
        return code.toString();
    }

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            return "";
        hasSuperclass = hasSuperclass && getDeclaredPrimaryKeyFields
            (_meta.getPCSuperclassMetaData()).length > 0;


        String toke = getTokenizer(hasSuperclass);
        CodeFormat code = newCodeFormat();
        if (_abstract || hasSuperclass)
            code.tab().append("protected ").append(toke).
                append(" fromString");
        else
            code.tab().append("private void fromString");
        code.openParen(true).append("String str").closeParen();
        code.openBrace(2).endl();


        // if we have any Object-type fields, die immediately 
        for (int i = 0; i < _fields.length; i++) {
            if (_fields[i].getObjectIdFieldType() != Object.class)
                continue;
            code.tab(2).append("throw new UnsupportedOperationException").
                parens().append(";").endl();
            code.closeBrace(2); 
            return code.toString();
        } 


        if (toke != null) {
            code.tab(2).append(toke).append(" toke = ");
            if (hasSuperclass) {
                // call super.fromString(str) to get the tokenizer that was
                // used to parse the superclass
                code.append("super.fromString").openParen(true).
                    append("str").closeParen();
            } else {
                // otherwise construct a new tokenizer with the string
                code.append("new ").append(toke).openParen(true).
                    append("str");
                if (toke == TOKENIZER_STD)
                    code.append(", \"").append(_token).append("\"");
                code.closeParen();
            }
            code.append(";").endl();
        }


        for (int i = 0; i < _fields.length; i++) {
            if (toke != null) {
                code.tab(2).append("str = toke.nextToken").parens().
                    append(";").endl();
            }
            code.tab(2).append(getConversionCode(_fields[i], "str")).endl();
        }
        if (_abstract || hasSuperclass)
            code.tab(2).append("return toke;").endl();
        code.closeBrace(2);
        return code.toString();
    }

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