| /******************************************************************************* |
| * Copyright (c) 2000, 2011 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 |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.text.template.contentassist; |
| |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.jface.text.templates.TemplateVariable; |
| import org.eclipse.jface.text.templates.TemplateVariableType; |
| |
| |
| /** |
| * {@link MultiVariable}s can store multiple sets of data; the currently active set is determined |
| * by the active <em>key</em>. The key may be set via {@link #setKey(Object)}. Data sets are |
| * opaque {@link Object} arrays that are converted to the {@link String} values expected by |
| * {@link TemplateVariable} using {@link Object#toString() toString}. The |
| * {@link #getCurrentChoice() choice} of a master variable is the {@link #setKey(Object) key} for |
| * the slave variable. |
| */ |
| public class MultiVariable extends TemplateVariable { |
| private static final Object DEFAULT_KEY= new Object(); |
| |
| private final Map<Object, Object[]> fValueMap= new HashMap<Object, Object[]>(); |
| /** The master key defining the active set. */ |
| private Object fKey; |
| /** The currently active object. */ |
| private Object fCurrentChoice; |
| |
| public MultiVariable(TemplateVariableType type, String name, int[] offsets) { |
| super(type, name, name, offsets); |
| fKey= DEFAULT_KEY; |
| fValueMap.put(fKey, new String[] { name }); |
| fCurrentChoice= getChoices()[0]; |
| } |
| |
| /** |
| * Sets the values of this variable under a specific key. |
| * |
| * @param key the key for which the values are valid |
| * @param values the possible values of this variable |
| */ |
| public void setChoices(Object key, Object[] values) { |
| Assert.isNotNull(key); |
| Assert.isTrue(values.length > 0); |
| // no action when called from super ctor |
| if (fValueMap != null) { |
| fValueMap.put(key, values); |
| if (key.equals(fKey)) |
| fCurrentChoice= getChoices()[0]; |
| setResolved(true); |
| } |
| } |
| |
| public void setKey(Object defaultKey) { |
| Assert.isTrue(fValueMap.containsKey(defaultKey)); |
| if (!fKey.equals(defaultKey)) { |
| fKey= defaultKey; |
| fCurrentChoice= getChoices()[0]; |
| } |
| } |
| |
| public Object getCurrentChoice() { |
| return fCurrentChoice; |
| } |
| |
| public void setCurrentChoice(Object currentChoice) { |
| Assert.isTrue(Arrays.asList(getChoices()).contains(currentChoice)); |
| fCurrentChoice= currentChoice; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.templates.TemplateVariable#setValues(java.lang.String[]) |
| */ |
| @Override |
| public void setValues(String[] values) { |
| setChoices(values); |
| } |
| |
| public void setChoices(Object[] values) { |
| setChoices(DEFAULT_KEY, values); |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.templates.TemplateVariable#getDefaultValue() |
| * @since 3.3 |
| */ |
| @Override |
| public String getDefaultValue() { |
| return toString(fCurrentChoice); |
| } |
| |
| public String toString(Object object) { |
| return object.toString(); |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.templates.TemplateVariable#getValues() |
| */ |
| @Override |
| public String[] getValues() { |
| Object[] values= getChoices(); |
| String[] result= new String[values.length]; |
| for (int i= 0; i < result.length; i++) |
| result[i]= toString(values[i]); |
| return result; |
| } |
| |
| public Object[] getChoices() { |
| return getChoices(fKey); |
| } |
| |
| /** |
| * Returns the choices for the set identified by <code>key</code>. |
| * |
| * @param key the key |
| * @return the choices for this variable and the given set, or |
| * <code>null</code> if the set is not defined. |
| */ |
| public Object[] getChoices(Object key) { |
| return fValueMap.get(key); |
| } |
| |
| public Object[][] getAllChoices() { |
| return fValueMap.values().toArray(new Object[fValueMap.size()][]); |
| } |
| } |