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Diffstat (limited to 'plugins/org.eclipse.wst.common.emf/wtpemf/org/eclipse/wst/common/internal/emf/resource/TranslatorFilter.java')
| -rw-r--r-- | plugins/org.eclipse.wst.common.emf/wtpemf/org/eclipse/wst/common/internal/emf/resource/TranslatorFilter.java | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/plugins/org.eclipse.wst.common.emf/wtpemf/org/eclipse/wst/common/internal/emf/resource/TranslatorFilter.java b/plugins/org.eclipse.wst.common.emf/wtpemf/org/eclipse/wst/common/internal/emf/resource/TranslatorFilter.java deleted file mode 100644 index a38b83b0c..000000000 --- a/plugins/org.eclipse.wst.common.emf/wtpemf/org/eclipse/wst/common/internal/emf/resource/TranslatorFilter.java +++ /dev/null @@ -1,223 +0,0 @@ -/*************************************************************************************************** - * Copyright (c) 2003, 2004 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 - **************************************************************************************************/ -/* - * Created on Sep 21, 2003 - * - */ -package org.eclipse.wst.common.internal.emf.resource; - -import org.eclipse.emf.ecore.EObject; - - -/* - * Translator filters can be used to differentiate between Object and Attribute Translators without - * breaking them out into seperate data structures. The Filter will rely on the underlying data - * structure used to store the children of the given Translator. - * - * getNextChild() will return null when no other translators of the given genre are available. - * - * The processing hints which are created and then passed to getNext*Translator() store information - * that needs to be persisted between calls. The createProcessingHints() will create a properly - * initialized array. The constants NEXT_START_HINT_INDX and MODE_HINT_INDX provide pointers into - * the array for the NEXT_START position and the proper mode to operate in - * (STANDARD_TRANSLATORS_MODE or - * - */ -public abstract class TranslatorFilter { - - protected final Translator translator; - protected final int version; - - public static final int NEXT_START_HINT_INDX = 0; - public static final int MODE_HINT_INDX = 1; - - public static final int STANDARD_TRANSLATORS_MODE = 0; - public static final int VARIABLE_TRANSLATORS_MODE = 1; - - /* - * These TranslatorFilters are used in a stateless mode. Only their scanNextTranslator() methods - * will be invoked - */ - private static final TranslatorFilter objectTranslatorFilter = new ObjectTranslatorFilter(null, -1); - private static final TranslatorFilter attributeTranslatorFilter = new AttributeTranslatorFilter(null, -1); - - - protected int mode = STANDARD_TRANSLATORS_MODE; - protected int index = -1; - - protected Translator cachedPeekAheadTranslator = null; - - public TranslatorFilter(Translator trans, int version) { - this.translator = trans; - this.version = version; - } - - /** - * Calling peek twice will advance the current child - */ - public Translator peekNextChild(EObject target) { - cachedPeekAheadTranslator = getNextChild(target); - return cachedPeekAheadTranslator; - } - - /** - * getNextChild() will return null when no other translators of the given genre are available. - */ - public Translator getNextChild(EObject target) { - - Translator result = null; - if (cachedPeekAheadTranslator != null) { - result = cachedPeekAheadTranslator; - cachedPeekAheadTranslator = null; - return result; - } - - int found = 0; - Translator children[] = null; - switch (mode) { - case STANDARD_TRANSLATORS_MODE : - children = this.translator.getChildren(target, this.version); - - /* Look for the next Attribute Translator */ - found = scanNextTranslator(children, this.index); - - if (found >= 0) { - /* - * If found, (1) update the result, (2) update the index so we can skip ahead on - * the next invocation (3) escape the VARIABLE_TRANSLATORS processing - */ - result = children[found]; - this.index = found; - break; - } - /* - * Reset the index. DO NOT BREAK. Allow entry into VARIABLE_TRANSLATORS case - */ - this.index = -1; - /* - * update the mode to VARIABLE_TRANSLATORS so we can skip to it directly next time - */ - this.mode = VARIABLE_TRANSLATORS_MODE; - //$FALL-THROUGH$ - case VARIABLE_TRANSLATORS_MODE : - children = this.translator.getVariableChildren(target, this.version); - found = scanNextTranslator(children, this.index); - if (found >= 0) { - /* - * If found, (1) update the result, (2) update the index so we can skip ahead on - * the next invocation - */ - result = children[found]; - this.index = found; - } - - } - - return result; - } - - public static final int[] createProcessingHints() { - return new int[]{-1, STANDARD_TRANSLATORS_MODE}; - } - - public static final Translator getNextAttributeTranslator(Translator translator, int startHint, int[] nextHint, EObject target, int version) { - - return TranslatorFilter.getNextChild(translator, startHint, nextHint, target, version, attributeTranslatorFilter); - } - - public static final Translator getNextObjectTranslator(Translator translator, int startHint, int[] nextHint, EObject target, int version) { - - return TranslatorFilter.getNextChild(translator, startHint, nextHint, target, version, objectTranslatorFilter); - } - - /** - * getNextChild() takes hints on where to begin in the children array of the given Translator. - * When it finds the translator, it will update the hints array with the start hint for the next - * invocation(hints[0]) and when necessary it will use update the mode (hints[1]) to either - * STANDARD_TRANSLATORS or VARIABLE_TRANSLATORS. - * - * @param translator - * @param startHint - * @param hints - * a two-element array: hints[0] will be updated with the next startHint and hints[1] - * will be used to store the mode. - * @param target - * @param version - * @param translatorFilter - * @return - */ - public static final Translator getNextChild(Translator translator, int startHint, int[] hints, EObject target, int version, TranslatorFilter translatorFilter) { - - Translator result = null; - - int innerStartHint = startHint; - int index = innerStartHint; - Translator children[] = null; - - switch (hints[MODE_HINT_INDX]) { - case STANDARD_TRANSLATORS_MODE : - children = translator.getChildren(target, version); - if (children != null && innerStartHint < children.length) { - - /* Look for the next Attribute Translator */ - index = translatorFilter.scanNextTranslator(children, index); - - if (index >= 0) { - /* - * If found, (1) update the result, (2) update the index so we can skip - * ahead on the next invocation (3) escape the VARIABLE_TRANSLATORS - * processing - */ - result = children[index]; - break; - } - /* - * DO NOT BREAK we will default to VARIABLE TRANSLATORS MODE so we must reset - * the startHint appropriately - */ - innerStartHint = -1; - } - - //$FALL-THROUGH$ - case VARIABLE_TRANSLATORS_MODE : - hints[MODE_HINT_INDX] = VARIABLE_TRANSLATORS_MODE; - /* - * Reset the index. - */ - index = innerStartHint; - children = translator.getVariableChildren(target, version); - if (children != null && children.length > 0 && innerStartHint < children.length) { - index = translatorFilter.scanNextTranslator(children, index); - result = (index >= 0) ? children[index] : null; - } - } - - hints[NEXT_START_HINT_INDX] = (result == null && children != null) ? children.length : index; - - return result; - } - - - public abstract int scanNextTranslator(Translator[] children, int start); - - /** - * @return - */ - public int getIndex() { - return index; - } - - /** - * @return - */ - public int getMode() { - return mode; - } - -}
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