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Zodiac Template Base

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package org.zodiac.template.base.impl;

import java.util.List;

import org.zodiac.sdk.toolkit.util.AssertUtil;
import org.zodiac.sdk.toolkit.util.collection.CollUtil;

/**
 * 假如当前模板名后缀无法找到模板，试着以其它后缀寻找。
 * 
 * 例如：模板test.vm不存在，那么就尝试一下test.jsp、 test.ftl等。
 * 
 */
public class SearchExtensionsStrategy implements TemplateSearchingStrategy {

    private final String[] availableExtensions;

    public SearchExtensionsStrategy(String[] extensions) {
        this.availableExtensions = AssertUtil.assertNotNull(extensions, "extensions");
    }

    public Object getKey(String templateName) {
        return null;
    }

    public boolean findTemplate(TemplateMatcher matcher) {
        List testedExtensions = CollUtil.list(availableExtensions.length);
        boolean found = false;
        String ext = matcher.getExtension();
        if (ext != null) {
            testedExtensions.add(ext);
            found = matcher.findTemplate();
        }

        for (int i = 0; !found && i < availableExtensions.length; i++) {
            ext = availableExtensions[i];
            if (!testedExtensions.contains(ext)) {
                testedExtensions.add(ext);
                matcher.setExtension(ext);
                found = matcher.findTemplate();
            }
        }

        return found;
    }
}