Source Code Cross Referenced for InlineSqlExp.java in  » Testing » PolePosition-0.20 » com » versant » core » jdbc » sql » exp » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Testing » PolePosition 0.20 » com.versant.core.jdbc.sql.exp 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998 - 2005 Versant Corporation
003:         * All rights reserved. This program and the accompanying materials
004:         * are made available under the terms of the Eclipse Public License v1.0
005:         * which accompanies this distribution, and is available at
006:         * http://www.eclipse.org/legal/epl-v10.html
007:         *
008:         * Contributors:
009:         * Versant Corporation - initial API and implementation
010:         */
011:        package com.versant.core.jdbc.sql.exp;
012:
013:        import com.versant.core.util.CharBuf;
014:        import com.versant.core.jdbc.sql.SqlDriver;
015:
016:        import java.util.Map;
017:
018:        import com.versant.core.common.BindingSupportImpl;
019:
020:        /**
021:         * Inline SQL with parameter replacement for argument column names.
022:         */
023:        public class InlineSqlExp extends SqlExp {
024:
025:            private String template;
026:
027:            public InlineSqlExp(String template, SqlExp children) {
028:                super (children);
029:                this .template = template;
030:            }
031:
032:            public InlineSqlExp() {
033:            }
034:
035:            public SqlExp createInstance() {
036:                return new InlineSqlExp();
037:            }
038:
039:            public SqlExp getClone(SqlExp clone, Map cloneMap) {
040:                super .getClone(clone, cloneMap);
041:
042:                ((InlineSqlExp) clone).template = template;
043:
044:                return clone;
045:            }
046:
047:            /**
048:             * Append SQL for this node to s.
049:             *
050:             * @param driver The driver being used
051:             * @param s Append the SQL here
052:             * @param leftSibling
053:             */
054:            public void appendSQLImp(SqlDriver driver, CharBuf s,
055:                    SqlExp leftSibling) {
056:                int n = template.length();
057:                int state = 0;
058:                for (int i = 0; i < n; i++) {
059:                    char c = template.charAt(i);
060:                    int pn;
061:                    switch (state) {
062:                    case 0:
063:                        if (c == '$')
064:                            state = '$';
065:                        else
066:                            s.append(c);
067:                        break;
068:                    case '$':
069:                        pn = 0;
070:                        switch (c) {
071:                        default:
072:                            s.append('$');
073:                        case '$':
074:                            s.append(c);
075:                            break;
076:                        case '1':
077:                            pn = 1;
078:                            break;
079:                        case '2':
080:                            pn = 2;
081:                            break;
082:                        case '3':
083:                            pn = 3;
084:                            break;
085:                        case '4':
086:                            pn = 4;
087:                            break;
088:                        case '5':
089:                            pn = 5;
090:                            break;
091:                        case '6':
092:                            pn = 6;
093:                            break;
094:                        case '7':
095:                            pn = 7;
096:                            break;
097:                        case '8':
098:                            pn = 8;
099:                            break;
100:                        case '9':
101:                            pn = 9;
102:                            break;
103:                        case '0':
104:                            pn = 10;
105:                            break;
106:                        }
107:                        if (pn > 0)
108:                            get(pn).appendSQL(driver, s, null);
109:                        state = 0;
110:                        break;
111:                    default:
112:                        throw BindingSupportImpl.getInstance().internal(
113:                                "Unknown state: " + state);
114:                    }
115:                }
116:                if (state == '$')
117:                    s.append('$');
118:            }
119:
120:            /**
121:             * Get the n'th entry in list with the first having index 1.
122:             */
123:            private SqlExp get(int idx) {
124:                SqlExp list = childList;
125:                for (int n = idx; list != null && --n > 0; list = list.next)
126:                    ;
127:                if (list == null) {
128:                    throw BindingSupportImpl.getInstance().invalidOperation(
129:                            "Invalid expression index: $"
130:                                    + (idx == 10 ? "0 (10)" : Integer
131:                                            .toString(idx)) + " in '"
132:                                    + template + "'");
133:                }
134:                return list;
135:            }
136:
137:        }
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