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org.zkoss.bind.impl.PropertyBindingImpl Maven / Gradle / Ivy
/* PropertyBindingImpl.java
Purpose:
Description:
History:
Thu Jul 28 11:59:20 2011, Created by henrichen
Copyright (C) 2011 Potix Corporation. All Rights Reserved.
*/
package org.zkoss.bind.impl;
import java.util.Map;
import java.util.regex.Pattern;
import org.zkoss.bind.BindContext;
import org.zkoss.bind.Binder;
import org.zkoss.bind.Converter;
import org.zkoss.bind.sys.BindEvaluatorX;
import org.zkoss.bind.sys.ConditionType;
import org.zkoss.bind.sys.PropertyBinding;
import org.zkoss.xel.ExpressionX;
import org.zkoss.zk.ui.Component;
/**
* A base implementation of {@link PropertyBinding}.
* @author henrichen
* @since 6.0.0
*/
public abstract class PropertyBindingImpl extends BindingImpl implements PropertyBinding {
private static final long serialVersionUID = 1463169907348730644L;
protected final ExpressionX _fieldExpr;
protected final AccessInfo _accessInfo;
private final ExpressionX _converter;
private final Map _converterArgs;
private String _filedName;
private static final Pattern FIELD_COMPILER = Pattern.compile("(?:\\(|\\)|\\[|\\]|\\.)");
/**
* @param binder
* @param comp
* @param fieldName the name of component field (ex, style, value)
* @param fieldExpr the EL expression to access component field (ex, self.style, self.value)
* @param accessExpr the binding expression , to access the bean
* @param conditionType the condition type
* @param command the command, if the conditionType is not prompt, then command must not null
* @param bindingArgs
* @param converterExpr
* @param converterArgs
*/
protected PropertyBindingImpl(Binder binder, Component comp, String fieldName, String fieldExpr, String accessExpr,
ConditionType conditionType, String command, Map bindingArgs, String converterExpr,
Map converterArgs) {
super(binder, comp, bindingArgs);
final BindEvaluatorX eval = binder.getEvaluatorX();
final Class returnType = Object.class;
if (!FIELD_COMPILER.matcher(fieldName).find()) {
if (fieldExpr.contains("self."))
this._fieldExpr = new PropertyExpression(comp, fieldExpr.substring(5));
else // use old implementation
this._fieldExpr = eval.parseExpressionX(null, fieldExpr, returnType);
} else {
this._fieldExpr = eval.parseExpressionX(null, fieldExpr, returnType);
}
this._accessInfo = AccessInfo.create(this, accessExpr, returnType, conditionType, command, ignoreTracker());
_converterArgs = converterArgs;
_converter = converterExpr == null ? null : parseConverter(eval, converterExpr);
_filedName = fieldName;
}
public Map getConverterArgs() {
return _converterArgs;
}
//should this binding set the ignore tracker attribute when evaluate the expression.
protected boolean ignoreTracker() {
return false;
}
private ExpressionX parseConverter(BindEvaluatorX eval, String converterExpr) {
final BindContext ctx = BindContextUtil.newBindContext(getBinder(), this, false, null, getComponent(), null);
//provide a bindcontext when pare expression of converter with this binding,
//do so, the tracker will also tracking the converter dependence with this binding.
return eval.parseExpressionX(ctx, converterExpr, Object.class);
}
public Converter getConverter() {
if (_converter == null)
return null;
final BindContext ctx = BindContextUtil.newBindContext(getBinder(), this, false, null, getComponent(), null);
final BindEvaluatorX eval = getBinder().getEvaluatorX();
Object obj = eval.getValue(ctx, getComponent(), _converter);
if (obj instanceof Converter) {
return (Converter) obj;
} else if (obj instanceof String) {
return getBinder().getConverter((String) obj); //binder will throw exception if not found
} else {
throw new ClassCastException(
"result of expression '" + _converter.getExpressionString() + "' is not a Converter, is " + obj);
}
}
public String getFieldName() {
return _filedName;
}
public String getCommandName() {
return this._accessInfo.getCommandName();
}
public String getPropertyString() {
return BindEvaluatorXUtil.getExpressionString(_accessInfo.getProperty());
}
public ConditionType getConditionType() {
return this._accessInfo.getConditionType();
}
//F80-ZK-2668: New Build-in Converter - FormattedTimeConverter
public ExpressionX getProperty() {
return this._accessInfo.getProperty();
}
public String toString() {
return new StringBuilder().append(getClass().getSimpleName()).append("@")
.append(Integer.toHexString(hashCode())).append(",component:").append(getComponent()).append(",field:")
.append(getFieldName()).append(",access:").append(getProperty().getExpressionString())
.append(",condition:").append(getConditionType()).append(",command:").append(getCommandName())
.toString();
}
}
