X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.databoard%2Fsrc%2Forg%2Fsimantics%2Fdataboard%2Fbinding%2FNumberBinding.java;fp=bundles%2Forg.simantics.databoard%2Fsrc%2Forg%2Fsimantics%2Fdataboard%2Fbinding%2FNumberBinding.java;h=e5cf14e20e907ac7ce4df2539a4c4c2ad3426c56;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/NumberBinding.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/NumberBinding.java
new file mode 100644
index 000000000..e5cf14e20
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+++ b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/NumberBinding.java
@@ -0,0 +1,139 @@
+/*******************************************************************************
+ *  Copyright (c) 2010 Association for Decentralized Information Management in
+ *  Industry THTH ry.
+ *  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:
+ *      VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.databoard.binding;
+
+import java.util.Set;
+
+import org.simantics.databoard.accessor.reference.ChildReference;
+import org.simantics.databoard.binding.error.BindingException;
+import org.simantics.databoard.binding.error.RuntimeBindingException;
+import org.simantics.databoard.binding.impl.BindingPrintContext;
+import org.simantics.databoard.type.NumberType;
+import org.simantics.databoard.util.Range;
+
+/**
+ * Super class for number types. 
+ *
+ * @author Toni Kalajainen
+ */
+public abstract class NumberBinding extends Binding {
+
+	/**
+	 * Create value by converting it from any Number instance to a Number 
+	 * instance of this Binding type.
+	 * 
+	 * NOTE WARNING! Using this method may lose precision or value in the conversion. 
+	 *   E.g. Double to Integer, or Long to Byte
+	 * 
+	 * @param value
+	 * @return the value in the format of the binding type
+	 */
+	public abstract Object create(Number value)
+	throws BindingException;
+	
+	/**
+	 * Creates a value from its string representation
+	 * @param value
+	 * @return number
+	 */
+	public abstract Object create(String value)
+	throws BindingException;
+	
+	/**
+	 * Get Data type
+	 * 
+	 * @return data type
+	 */
+	@Override
+	public NumberType type() {
+		return (NumberType) type;
+	}
+	
+	/**
+	 * Get numeric value of an object
+	 * 
+	 * @param obj object
+	 * @return Number
+	 * @throws BindingException thrown if obj is incorrect class
+	 */
+	public Number getValue(Object obj) throws BindingException {
+		return ((Number)obj);
+	}
+	
+	public abstract void setValue(Object obj, Number value) throws BindingException;
+	
+	/**
+	 * Assert the obj is a valid number. 
+	 * 
+	 * This asserts 
+	 *  1. The value is within the range defined in the NumberType
+	 * 
+	 * @throws BindingException
+	 */
+	@Override
+	public void assertInstaceIsValid(Object obj, Set<Object> validInstances) throws BindingException {
+		if (!isInstance(obj)) throw new BindingException("Not a correct instance");		
+		NumberType type = type();
+		Range range = type.getRange();
+		if (range!=null) {
+			Number value = getValue(obj);
+			if (!range.contains(value)) {
+				throw new BindingException("Value ("+value+") out of range ("+range+")");
+			}
+		}
+	}
+	
+	public Object createUnchecked(String value) throws RuntimeBindingException {
+		try {
+			return create(value);
+		} catch (BindingException e) {
+			return new RuntimeBindingException(e);
+		}
+	}
+	public Object createUnchecked(Number value) throws RuntimeBindingException {
+		try {
+			return create(value);
+		} catch (BindingException e) {
+			return new RuntimeBindingException(e);
+		}
+	}
+	
+	@Override
+	protected void toString(Object value, BindingPrintContext ctx) throws BindingException {
+		ctx.b.append(getValue(value).toString());
+	}
+	
+	@Override
+	public void readFrom(Binding srcBinding, Object src, Object dst)
+			throws BindingException {
+		Number v = ((NumberBinding)srcBinding).getValue(src);
+		setValue(dst, v);		
+	}
+	
+	@Override
+	public Binding getComponentBinding(ChildReference path) {
+		if (path==null) return this;		
+		throw new IllegalArgumentException();
+	}	
+	
+	@Override
+	public int getComponentCount() {
+		return 0;
+	}
+	
+	@Override
+	public Binding getComponentBinding(int index) {
+		throw new IllegalArgumentException();
+	}
+	
+}
+