Source Code Cross Referenced for Schema.java in  » Ajax » Laszlo-4.0.10 » org » openlaszlo » xml » internal » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Ajax » Laszlo 4.0.10 » org.openlaszlo.xml.internal 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /* ****************************************************************************
02:         * Schema.java
03:         * ****************************************************************************/
04:
05:        /* J_LZ_COPYRIGHT_BEGIN *******************************************************
06:         * Copyright 2001-2007 Laszlo Systems, Inc.  All Rights Reserved.              *
07:         * Use is subject to license terms.                                            *
08:         * J_LZ_COPYRIGHT_END *********************************************************/
09:
10:        package org.openlaszlo.xml.internal;
11:
12:        import org.jdom.Element;
13:        import java.util.*;
14:
15:        /**
16:         * Describes the content model of an XML document.
17:         *
18:         * @author Oliver Steele
19:         * @version 1.0
20:         */
21:        public abstract class Schema {
22:
23:            /** Hold mapping from Javascript type names to Types */
24:            static Map typeNames = new HashMap();
25:
26:            /** Represents the type of an attribute whose type isn't known. */
27:            public static final Type UNKNOWN_TYPE = newType("unknown");
28:            /** Represents a String. */
29:            public static final Type STRING_TYPE = newType("string");
30:            /** Represents a number. */
31:            public static final Type NUMBER_TYPE = newType("number");
32:            /** Represents an XML ID. */
33:            public static final Type ID_TYPE = newType("ID");
34:
35:            /** The type of an attribute. */
36:            public static class Type {
37:                private String mName;
38:
39:                public Type(String name) {
40:                    mName = name;
41:                }
42:
43:                public String toString() {
44:                    return mName;
45:                }
46:            }
47:
48:            /** Returns a unique type.
49:             * @return a unique type
50:             */
51:            public static Type newType(String typeName) {
52:                Type newtype = new Type(typeName);
53:                typeNames.put(typeName, newtype);
54:                return newtype;
55:            }
56:
57:            public static void addTypeAlias(String typeName, Type type) {
58:                typeNames.put(typeName, type);
59:            }
60:
61:            /** Look up the Type object from a Javascript type name */
62:            public Type getTypeForName(String typeName) {
63:                return (Type) typeNames.get(typeName);
64:            }
65:
66:            /** An empty Schema, all of whose attribute types are unknown. */
67:            public static final Schema DEFAULT_SCHEMA = new Schema() {
68:                /** @see Schema */
69:                public Type getAttributeType(Element element, String name) {
70:                    return UNKNOWN_TYPE;
71:                }
72:            };
73:
74:            /**
75:             * Returns a value representing the type of an attribute within an
76:             * XML element.
77:             * 
78:             * @param element an Element
79:             * @param attributeName an attribute name
80:             * @return a value represting the type of the attribute's
81:             */
82:            public abstract Type getAttributeType(Element element,
83:                    String attributeName);
84:        }
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