diff org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/conversion/StringToShortConverter.d @ 78:0a55d2d5a946

Added file for databinding
author Frank Benoit <benoit@tionex.de>
date Tue, 14 Apr 2009 11:35:29 +0200
parents
children 383ce7bd736b
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/conversion/StringToShortConverter.d	Tue Apr 14 11:35:29 2009 +0200
@@ -0,0 +1,94 @@
+/*******************************************************************************
+ * Copyright (c) 2007 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ ******************************************************************************/
+
+module org.eclipse.core.internal.databinding.conversion.StringToShortConverter;
+
+import java.lang.all;
+
+import org.eclipse.core.internal.databinding.conversion.StringToNumberParser.ParseResult;
+import org.eclipse.core.internal.databinding.validation.NumberFormatConverter;
+
+import com.ibm.icu.text.NumberFormat;
+
+/**
+ * @since 1.0
+ */
+public class StringToShortConverter : NumberFormatConverter {
+    private final NumberFormat numberFormat;
+    private final bool primitive;
+    
+    private String outOfRangeMessage;
+
+    /**
+     * Constructs a new instance.
+     */
+    private this(NumberFormat numberFormat, ClassInfo toType) {
+        super(String.classinfo, toType, numberFormat);
+        this.numberFormat = numberFormat;
+        primitive = toType.isPrimitive();
+    }
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see org.eclipse.core.databinding.conversion.IConverter#convert(java.lang.Object)
+     */
+    public Object convert(Object fromObject) {
+        ParseResult result = StringToNumberParser.parse(fromObject,
+                numberFormat, primitive);
+
+        if (result.getPosition() !is null) {
+            // this shouldn't happen in the pipeline as validation should catch
+            // it but anyone can call convert so we should return a properly
+            // formatted message in an exception
+            throw new IllegalArgumentException(StringToNumberParser
+                    .createParseErrorMessage(cast(String) fromObject, result
+                            .getPosition()));
+        } else if (result.getNumber() is null) {
+            // if an error didn't occur and the number is null then it's a boxed
+            // type and null should be returned
+            return null;
+        }
+
+        if (StringToNumberParser.inShortRange(result.getNumber())) {
+            return new Short(result.getNumber().shortValue());
+        }
+        
+        synchronized (this) {
+            if (outOfRangeMessage is null) {
+                outOfRangeMessage = StringToNumberParser
+                .createOutOfRangeMessage(new Shortcast(Short.MIN_VALUE), new Shortcast(Short.MAX_VALUE), numberFormat);
+            }
+                        
+            throw new IllegalArgumentException(outOfRangeMessage);
+        }
+    }
+
+    /**
+     * @param primitive
+     *            <code>true</code> if the convert to type is a short
+     * @return to Short converter for the default locale
+     */
+    public static StringToShortConverter toShort(bool primitive) {
+        return toShort(NumberFormat.getIntegerInstance(), primitive);
+    }
+
+    /**
+     * @param numberFormat
+     * @param primitive
+     * @return to Short converter with the provided numberFormat
+     */
+    public static StringToShortConverter toShort(NumberFormat numberFormat,
+            bool primitive) {
+        return new StringToShortConverter(numberFormat,
+                (primitive) ? Short.TYPE : Short.classinfo);
+    }
+}