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package org.bukkit.metadata;
import java.lang.ref.WeakReference;
import org.apache.commons.lang.Validate;
import org.bukkit.plugin.Plugin;
import org.bukkit.util.NumberConversions;
/**
* Optional base class for facilitating MetadataValue implementations.
* <p>
* This provides all the conversion functions for MetadataValue so that
* writing an implementation of MetadataValue is as simple as implementing
* value() and invalidate().
*/
public abstract class MetadataValueAdapter implements MetadataValue {
protected final WeakReference<Plugin> owningPlugin;
protected MetadataValueAdapter(Plugin owningPlugin) {
Validate.notNull(owningPlugin, "owningPlugin cannot be null");
this.owningPlugin = new WeakReference<Plugin>(owningPlugin);
}
public Plugin getOwningPlugin() {
return owningPlugin.get();
}
public int asInt() {
return NumberConversions.toInt(value());
}
public float asFloat() {
return NumberConversions.toFloat(value());
}
public double asDouble() {
return NumberConversions.toDouble(value());
}
public long asLong() {
return NumberConversions.toLong(value());
}
public short asShort() {
return NumberConversions.toShort(value());
}
public byte asByte() {
return NumberConversions.toByte(value());
}
public boolean asBoolean() {
Object value = value();
if (value instanceof Boolean) {
return (Boolean) value;
}
if (value instanceof Number) {
return ((Number) value).intValue() != 0;
}
if (value instanceof String) {
return Boolean.parseBoolean((String) value);
}
return value != null;
}
public String asString() {
Object value = value();
if (value == null) {
return "";
}
return value.toString();
}
}
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