Copyright (c) 2009, 2011 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2009, 2011 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.core.internal.registry;

An object which represents the user-defined contents of an extension
in a plug-in manifest.
/**
 * An object which represents the user-defined contents of an extension
 * in a plug-in manifest.
 */
public class ConfigurationElementMulti extends ConfigurationElement {

	
Translated values for the locale
/**
	 * Translated values for the locale
	 */
	private DirectMap translatedProperties = new DirectMap(10, 0.5f);

	protected ConfigurationElementMulti(ExtensionRegistry registry, boolean persist) {
		super(registry, persist);
	}

	protected ConfigurationElementMulti(int self, String contributorId, String name, String[] propertiesAndValue, int[] children, int extraDataOffset, int parent, byte parentType, ExtensionRegistry registry, boolean persist) {
		super(self, contributorId, name, propertiesAndValue, children, extraDataOffset, parent, parentType, registry, persist);
	}

	@Override
	String getAttribute(String attrName, String locale) {
		if (propertiesAndValue.length <= 1)
			return null;
		//round down to an even size
		int size = propertiesAndValue.length - (propertiesAndValue.length % 2);
		int index = -1;
		for (int i = 0, j = 0; i < size; i += 2, j++) {
			if (!(propertiesAndValue[i].equals(attrName)))
				continue;
			index = j;
			break;
		}
		if (index == -1)
			return null;

		String result = getTranslatedAtIndex(index, locale);
		if (result != null)
			return result;
		return propertiesAndValue[index * 2 + 1]; // return non-translated value
	}

	@Override
	String getValue(String locale) {
		if (propertiesAndValue.length == 0 || propertiesAndValue.length % 2 == 0)
			return null;
		int index = propertiesAndValue.length - 1;
		return getTranslatedAtIndex(index, locale);
	}

	synchronized private String getTranslatedAtIndex(int index, String locale) {
		String[] translated = null;
		if (!translatedProperties.containsKey(locale)) {
			String[] propertiesNonTranslated = getNonTranslated();
			translated = registry.translate(propertiesNonTranslated, getContributor(), locale);
			translatedProperties.put(locale, translated);
			registry.getObjectManager().markDirty();
		} else
			translated = translatedProperties.get(locale);

		if (translated != null)
			return translated[index];
		return null;
	}

	private String[] getNonTranslated() {
		int size = propertiesAndValue.length / 2;
		boolean hasValue = ((propertiesAndValue.length % 2) == 1);
		if (hasValue)
			size++;
		String[] propertiesNonTranslated = new String[size];
		int pos = 0;
		for (int i = 1; i < propertiesAndValue.length; i += 2) {
			propertiesNonTranslated[pos] = propertiesAndValue[i];
			pos++;
		}
		if (hasValue)
			propertiesNonTranslated[pos] = propertiesAndValue[propertiesAndValue.length - 1];
		return propertiesNonTranslated;
	}

	synchronized int getNumCachedLocales() {
		return translatedProperties.getSzie();
	}

	synchronized String[] getCachedLocales() {
		return translatedProperties.getKeys();
	}

	synchronized String[][] getCachedTranslations() {
		return translatedProperties.getValues();
	}

	synchronized void setTranslatedProperties(DirectMap translated) {
		translatedProperties = translated;
	}

	///////////////////////////////////////////////////////////////////////////////////
	// "Default" locale

	@Override
	public String getAttribute(String attrName) {
		return getAttribute(attrName, getLocale());
	}

	@Override
	public String getValue() {
		return getValue(getLocale());
	}

}