svn commit: r724428 - in /ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string: FlexibleStringExpander.java UelUtil.java

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svn commit: r724428 - in /ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string: FlexibleStringExpander.java UelUtil.java

adrianc
Author: adrianc
Date: Mon Dec  8 10:00:22 2008
New Revision: 724428

URL: http://svn.apache.org/viewvc?rev=724428&view=rev
Log:
More work on the Unified Expression Language code:

1. Renamed some things in UelUtil.java to make them more understandable
2. Moved exception handling out of UelUtil.java and into calling methods
3. Added missing UEL implementation to FlexibleStringExpander.java

Modified:
    ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string/FlexibleStringExpander.java
    ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string/UelUtil.java

Modified: ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string/FlexibleStringExpander.java
URL: http://svn.apache.org/viewvc/ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string/FlexibleStringExpander.java?rev=724428&r1=724427&r2=724428&view=diff
==============================================================================
--- ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string/FlexibleStringExpander.java (original)
+++ ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string/FlexibleStringExpander.java Mon Dec  8 10:00:22 2008
@@ -29,7 +29,6 @@
 import org.ofbiz.base.util.Debug;
 import org.ofbiz.base.util.ObjectType;
 import org.ofbiz.base.util.cache.UtilCache;
-import org.ofbiz.base.util.collections.FlexibleMapAccessor;
 import org.ofbiz.base.util.UtilDateTime;
 import org.ofbiz.base.util.UtilFormatOut;
 import org.ofbiz.base.util.UtilMisc;
@@ -280,7 +279,7 @@
     }
     
     protected static class BshElem implements StrElem {
-        String str;
+        protected String str;
         protected BshElem(String scriptlet) {
             this.str = scriptlet;
         }
@@ -305,20 +304,23 @@
     }
 
     protected static class CurrElem implements StrElem {
-        String str;
+        protected String valueStr;
         protected FlexibleStringExpander codeExpr = null;
         protected CurrElem(String original) {
             int currencyPos = original.indexOf("?currency(");
-            int closeBracket = original.indexOf(")", currencyPos+10);
-            this.codeExpr = FlexibleStringExpander.getInstance(original.substring(currencyPos+10, closeBracket));
-            this.str = original.substring(0, currencyPos);
+            int closeParen = original.indexOf(")", currencyPos + 10);
+            this.codeExpr = FlexibleStringExpander.getInstance(original.substring(currencyPos + 10, closeParen));
+            this.valueStr = openBracket + original.substring(0, currencyPos) + closeBracket;
         }
         public void append(StringBuilder buffer, Map<String, ? extends Object> context, TimeZone timeZone, Locale locale) {
-            FlexibleMapAccessor<Object> fma = new FlexibleMapAccessor<Object>(this.str);
-            Object obj = fma.get(context, locale);
-            if (obj != null) {
-                String currencyCode = this.codeExpr.expandString(context, timeZone, locale);
-                buffer.append(UtilFormatOut.formatCurrency(Double.valueOf(obj.toString()), currencyCode, locale));
+            try {
+                Object obj = UelUtil.evaluate(context, this.valueStr);
+                if (obj != null) {
+                    String currencyCode = this.codeExpr.expandString(context, timeZone, locale);
+                    buffer.append(UtilFormatOut.formatCurrency(Double.valueOf(obj.toString()), currencyCode, locale));
+                }
+            } catch (Exception e) {
+                Debug.logVerbose("Error evaluating expression: " + e, module);
             }
         }
     }
@@ -345,35 +347,37 @@
                     this.hint = expr.length();
                 }
             }
-            Object obj = UelUtil.evaluate(context, openBracket + expr.toString() + closeBracket);
-            if (obj != null) {
-                try {
-                    buffer.append((String) ObjectType.simpleTypeConvert(obj, "String", null, timeZone, locale, true));
-                } catch (Exception e) {
-                    buffer.append(obj);
+            try {
+                Object obj = UelUtil.evaluate(context, openBracket + expr.toString() + closeBracket);
+                if (obj != null) {
+                    buffer.append((String) ObjectType.simpleTypeConvert(obj, "String", null, timeZone, locale, false));
                 }
+            } catch (Exception e) {
+                Debug.logVerbose("Error evaluating expression: " + e, module);
             }
         }
     }
 
     protected static class VarElem implements StrElem {
         protected String original = null;
+        protected String bracketedOriginal = null;
         protected VarElem(String original) {
             this.original = original;
+            this.bracketedOriginal = openBracket + original + closeBracket;
         }
         public void append(StringBuilder buffer, Map<String, ? extends Object> context, TimeZone timeZone, Locale locale) {
-            Object obj = UelUtil.evaluate(context, openBracket + this.original + closeBracket);
-            if (obj == null) {
-                if (this.original.startsWith("env.")) {
-                    obj = System.getProperty(this.original.substring(4));
+            try {
+                Object obj = UelUtil.evaluate(context, this.bracketedOriginal);
+                if (obj == null) {
+                    if (this.original.startsWith("env.")) {
+                        obj = System.getProperty(this.original.substring(4));
+                    }
                 }
-            }
-            if (obj != null) {
-                try {
-                    buffer.append((String) ObjectType.simpleTypeConvert(obj, "String", null, timeZone, locale, true));
-                } catch (Exception e) {
-                    buffer.append(obj);
+                if (obj != null) {
+                    buffer.append((String) ObjectType.simpleTypeConvert(obj, "String", null, timeZone, locale, false));
                 }
+            } catch (Exception e) {
+                Debug.logVerbose("Error evaluating expression: " + e, module);
             }
         }
     }

Modified: ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string/UelUtil.java
URL: http://svn.apache.org/viewvc/ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string/UelUtil.java?rev=724428&r1=724427&r2=724428&view=diff
==============================================================================
--- ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string/UelUtil.java (original)
+++ ofbiz/trunk/framework/base/src/org/ofbiz/base/util/string/UelUtil.java Mon Dec  8 10:00:22 2008
@@ -24,8 +24,6 @@
 
 import javolution.util.FastMap;
 
-import org.ofbiz.base.util.Debug;
-
 /** Implements the Unified Expression Language (JSR-245). */
 public class UelUtil {
     
@@ -46,24 +44,18 @@
      * @param context Evaluation context (variables)
      * @param expression UEL expression
      * @return Result object
+     * @throws Various <code>javax.el.*</code> exceptions
      */
     public static Object evaluate(Map<String, ? extends Object> context, String expression) {
-        Object obj = null;
-        try {
-            ELContext elContext = new BasicContext(context);
-            ValueExpression ve = exprFactory.createValueExpression(elContext, expression, Object.class);
-            obj = ve.getValue(elContext);
-        } catch (Exception e) {
-            Debug.logVerbose("Error evaluating expression: " + e, module);
-        }
-        return obj;
+        ELContext elContext = new BasicContext(context);
+        ValueExpression ve = exprFactory.createValueExpression(elContext, expression, Object.class);
+        return ve.getValue(elContext);
     }
 
     protected static class BasicContext extends ELContext {
-        protected VariableMapper variables = null;
-        protected BasicContext() {}
+        protected final VariableMapper variableMapper;
         public BasicContext(Map<String, ? extends Object> context) {
-            this.variables = new Variables(context);
+            this.variableMapper = new BasicVariableMapper(context, this);
         }
         public ELResolver getELResolver() {
             return defaultResolver;
@@ -72,22 +64,24 @@
             return functionMapper;
         }
         public VariableMapper getVariableMapper() {
-            return this.variables;
+            return this.variableMapper;
         }
-        protected class Variables extends VariableMapper {
-            protected Map<String, Object> context = FastMap.newInstance();
-            protected Variables(Map<String, ? extends Object> context) {
-                this.context.putAll(context);
+        protected class BasicVariableMapper extends VariableMapper {
+            protected ELContext elContext;
+            protected Map<String, Object> variables = FastMap.newInstance();
+            protected BasicVariableMapper(Map<String, ? extends Object> context, ELContext parentContext) {
+                this.variables.putAll(context);
+                this.elContext = parentContext;
             }
             public ValueExpression resolveVariable(String variable) {
-                Object obj = this.context.get(variable);
+                Object obj = this.variables.get(variable);
                 if (obj != null) {
                     return new BasicValueExpression(obj);
                 }
                 return null;
             }
             public ValueExpression setVariable(String variable, ValueExpression expression) {
-                return new BasicValueExpression(this.context.put(variable, expression.getValue(null)));
+                return new BasicValueExpression(this.variables.put(variable, expression.getValue(this.elContext)));
             }
         }
         @SuppressWarnings("serial")