69 lines
1.7 KiB
Java
69 lines
1.7 KiB
Java
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package net.filebot.ui.rename;
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import java.io.File;
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import java.text.Format;
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import java.util.Map;
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import javax.script.ScriptException;
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import net.filebot.format.ExpressionFormat;
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import net.filebot.format.MediaBindingBean;
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import net.filebot.similarity.Match;
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class ExpressionFormatter implements MatchFormatter {
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private final String expression;
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private ExpressionFormat format;
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private Format preview;
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private Class<?> target;
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public ExpressionFormatter(String expression, Format preview, Class<?> target) {
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if (expression == null || expression.isEmpty())
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throw new IllegalArgumentException("Expression must not be null or empty");
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this.expression = expression;
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this.preview = preview;
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this.target = target;
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}
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@Override
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public boolean canFormat(Match<?, ?> match) {
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// target object is required, file is optional
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return target.isInstance(match.getValue()) && (match.getCandidate() == null || match.getCandidate() instanceof File);
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}
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@Override
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public String preview(Match<?, ?> match) {
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return preview != null ? preview.format(match.getValue()) : match.getValue().toString();
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}
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@Override
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public synchronized String format(Match<?, ?> match, Map<?, ?> context) throws ScriptException {
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// lazy initialize script engine
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if (format == null) {
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format = new ExpressionFormat(expression);
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}
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// evaluate the expression using the given bindings
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Object bindingBean = new MediaBindingBean(match.getValue(), (File) match.getCandidate(), (Map<File, Object>) context);
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String result = format.format(bindingBean).trim();
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// if result is empty, check for script exceptions
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if (result.isEmpty() && format.caughtScriptException() != null) {
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throw format.caughtScriptException();
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}
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return result;
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}
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}
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