91 lines
2.1 KiB
Java
91 lines
2.1 KiB
Java
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package net.sourceforge.tuned.ui;
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import java.lang.reflect.Method;
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import java.util.Arrays;
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import javax.swing.Icon;
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import net.sourceforge.tuned.ExceptionUtilities;
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/**
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* <code>LabelProvider</code> based on reflection.
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*/
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public class SimpleLabelProvider<T> implements LabelProvider<T> {
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private final Method getIconMethod;
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private final Method getTextMethod;
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/**
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* Factory method for {@link #SimpleLabelProvider(Class)}.
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*
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* @return new <code>LabelProvider</code>
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*/
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public static <T> SimpleLabelProvider<T> forClass(Class<T> type) {
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return new SimpleLabelProvider<T>(type);
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}
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/**
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* Create a new LabelProvider which will use the <code>getText</code>, <code>getName</code>
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* or <code>toString</code> method for text and the <code>getIcon</code> method for the
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* icon.
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*
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* @param type a class that has one of the text methods and the icon method
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*/
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public SimpleLabelProvider(Class<T> type) {
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getTextMethod = findAnyMethod(type, "getText", "getName", "toString");
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getIconMethod = findAnyMethod(type, "getIcon");
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}
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/**
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* Create a new LabelProvider which will use a specified method of a given class
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*
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* @param type a class with the specified method
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* @param getText a method name such as <code>getText</code>
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* @param getIcon a method name such as <code>getIcon</code>
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*/
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public SimpleLabelProvider(Class<T> type, String getText, String getIcon) {
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getTextMethod = findAnyMethod(type, getText);
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getIconMethod = findAnyMethod(type, getIcon);
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}
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private Method findAnyMethod(Class<T> type, String... names) {
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for (String name : names) {
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try {
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return type.getMethod(name);
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} catch (NoSuchMethodException e) {
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// try next method name
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}
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}
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throw new IllegalArgumentException("Method not found: " + Arrays.toString(names));
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}
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@Override
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public String getText(T value) {
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try {
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return (String) getTextMethod.invoke(value);
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} catch (Exception e) {
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throw ExceptionUtilities.asRuntimeException(e);
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}
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}
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@Override
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public Icon getIcon(T value) {
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try {
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return (Icon) getIconMethod.invoke(value);
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} catch (Exception e) {
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throw ExceptionUtilities.asRuntimeException(e);
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}
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}
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}
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