001: /*
002: The contents of this file are subject to the Common Public Attribution License
003: Version 1.0 (the "License"); you may not use this file except in compliance with
004: the License. You may obtain a copy of the License at
005: http://www.projity.com/license . The License is based on the Mozilla Public
006: License Version 1.1 but Sections 14 and 15 have been added to cover use of
007: software over a computer network and provide for limited attribution for the
008: Original Developer. In addition, Exhibit A has been modified to be consistent
009: with Exhibit B.
010:
011: Software distributed under the License is distributed on an "AS IS" basis,
012: WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
013: specific language governing rights and limitations under the License. The
014: Original Code is OpenProj. The Original Developer is the Initial Developer and
015: is Projity, Inc. All portions of the code written by Projity are Copyright (c)
016: 2006, 2007. All Rights Reserved. Contributors Projity, Inc.
017:
018: Alternatively, the contents of this file may be used under the terms of the
019: Projity End-User License Agreeement (the Projity License), in which case the
020: provisions of the Projity License are applicable instead of those above. If you
021: wish to allow use of your version of this file only under the terms of the
022: Projity License and not to allow others to use your version of this file under
023: the CPAL, indicate your decision by deleting the provisions above and replace
024: them with the notice and other provisions required by the Projity License. If
025: you do not delete the provisions above, a recipient may use your version of this
026: file under either the CPAL or the Projity License.
027:
028: [NOTE: The text of this license may differ slightly from the text of the notices
029: in Exhibits A and B of the license at http://www.projity.com/license. You should
030: use the latest text at http://www.projity.com/license for your modifications.
031: You may not remove this license text from the source files.]
032:
033: Attribution Information: Attribution Copyright Notice: Copyright © 2006, 2007
034: Projity, Inc. Attribution Phrase (not exceeding 10 words): Powered by OpenProj,
035: an open source solution from Projity. Attribution URL: http://www.projity.com
036: Graphic Image as provided in the Covered Code as file: openproj_logo.png with
037: alternatives listed on http://www.projity.com/logo
038:
039: Display of Attribution Information is required in Larger Works which are defined
040: in the CPAL as a work which combines Covered Code or portions thereof with code
041: not governed by the terms of the CPAL. However, in addition to the other notice
042: obligations, all copies of the Covered Code in Executable and Source Code form
043: distributed must, as a form of attribution of the original author, include on
044: each user interface screen the "OpenProj" logo visible to all users. The
045: OpenProj logo should be located horizontally aligned with the menu bar and left
046: justified on the top left of the screen adjacent to the File menu. The logo
047: must be at least 100 x 25 pixels. When users click on the "OpenProj" logo it
048: must direct them back to http://www.projity.com.
049: */
050: package com.projity.scripting;
051:
052: import groovy.lang.GroovyClassLoader;
053: import groovy.lang.GroovyObject;
054:
055: import java.util.ArrayList;
056: import java.util.Iterator;
057:
058: import com.projity.field.InvalidFormulaException;
059:
060: public class FormulaClass {
061: ArrayList formulas = new ArrayList();
062: String className;
063: private boolean init = false;
064: private static final String imports = "";
065: private Class groovyClass = null;
066: private GroovyObject groovyObject = null;
067:
068: public FormulaClass(String className) {
069: this .className = className;
070: }
071:
072: void add(ScriptedFormula formula) {
073: formulas.add(formula);
074: formula.setFormulaClass(this );
075:
076: }
077:
078: private Exception compileException = null;
079:
080: public synchronized void compile() {
081: if (groovyClass == null) {
082: Runnable r = new Runnable() {
083: public void run() {
084: // long x = System.currentTimeMillis();
085: String classText = buildClassText();
086: GroovyClassLoader loader = new GroovyClassLoader(
087: getClass().getClassLoader());
088: // GroovyClassLoader loader = new GroovyClassLoader(ClassLoaderUtils.getLocalClassLoader());
089: try {
090: groovyClass = loader.parseClass(classText); //TODO this his horribly slow (~500ms) Can we parse all at once or can we do this lazily or initialize in another thread?
091: groovyObject = (GroovyObject) groovyClass
092: .newInstance(); // this would be ideally done by a factory
093: } catch (Exception e) {
094: compileException = e;
095: System.out.println(e);
096: }
097: // System.out.println("compiled class " + className + " in " + (System.currentTimeMillis()-x) + "ms");
098: }
099: };
100: r.run();
101: }
102: }
103:
104: private String buildClassText() {
105: StringBuffer text = new StringBuffer();
106: text.append(imports);
107: text.append("class " + className + " {");
108:
109: Iterator i = formulas.iterator();
110: while (i.hasNext()) {
111: ScriptedFormula formula = (ScriptedFormula) i.next();
112: text.append("\n\tObject " + formula.getFormulaName()
113: + "(Object " + formula.getVariableName() + ") {");
114: text.append("\n\t\treturn " + formula.getText() + ";\n\t}");
115: }
116: text.append("\n}"); // end of class body
117: return text.toString();
118: }
119:
120: Object args[] = new Object[1];
121:
122: public Object evaluate(String method, Object object)
123: throws InvalidFormulaException {
124: // lets call some method on an instance
125: try {
126: if (groovyClass == null)
127: compile();
128: args[0] = object;
129: return groovyObject.invokeMethod(method, args); //TODO eventually cache the Method
130: } catch (Exception e) {
131: e.printStackTrace();
132: throw new InvalidFormulaException(e);
133: }
134: }
135: }
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