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跨平臺控件查詢機制之擴展iQuery(2)
實現ITreeNode和IProperty接口。
例如iQuery for Android Instrument的版本就是通過這種方法實現的：
cc.iqa.iquery.android.SoloTreeNode.java：
package cc.iqa.iquery.android;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import android.view.View;
import android.view.ViewGroup;
import cc.iqa.iquery.*;
public class SoloTreeNode implements ITreeNode {
private View _view = null;
public SoloTreeNode(View view) {
_view = view;
}
public SoloTreeNode(View view, SoloTreeNode parent) {
this(view);
_parent = parent;
}
public View getView() { return _view; }
@Override
public String getName() {
return _view.getClass().toString();
}
public boolean containsProperty(String key) {
return getMethod(key) != null || getField(key) != null;
}
public IProperty getProperty(String key) {
Method method = getMethod(key);
Object value = null;
if (method != null) {
try {
value = method.invoke(_view);
} catch (IllegalArgumentException e) {
return null;
} catch (IllegalAccessException e) {
return null;
} catch (InvocationTargetException e) {
return null;
}
} else {
Field field = getField(key);
if ( field != null ) {
field.setAccessible(true);
try {
value = field.get(_view);
} catch (IllegalArgumentException e) {
return null;
} catch (IllegalAccessException e) {
return null;
}
}
}
return new SoloProperty(key, value.toString());
}
private ITreeNode _parent;
@Override
public ITreeNode getParent() {
return _parent;
}
private List _children;
@Override
public List getChildren() {
if (_children == null) {
_children = new ArrayList();
if (_view instanceof ViewGroup) {
addChildren(_children, (ViewGroup) _view);
}
}
return _children;
}
private Method getMethod(String key) {
Class cls = _view.getClass();
String getter = String.format("%1$s", key);
try {
return cls.getMethod(getter);
} catch (SecurityException e) {
return null;
} catch (NoSuchMethodException e) {
return null;
}
}
private Field getField(String key) {
Class cls = _view.getClass();
Field ret = null;
while ( ret == null && cls != null ) {
try {
ret = cls.getDeclaredField(key);
} catch (SecurityException e) {
} catch (NoSuchFieldException e) {
}
if ( ret != null )
break;
try {
ret = cls.getField(key);
} catch (SecurityException e) {
} catch (NoSuchFieldException e) {
}
cls = cls.getSuperclass();
}
return ret;
}
private void addChildren(List children, ViewGroup viewGroup) {
for (int i = 0; i < viewGroup.getChildCount(); i++) {
final View child = viewGroup.getChildAt(i);
children.add(new SoloTreeNode(child, this));
}
}
@Override
public String getType() {
return _view.getClass().toString();
}
@Override
public String getText() {
return getProperty("mText").getValue();
}
}
cc.iqa.iquery.android.SoloProperty.java：
package cc.iqa.iquery.android;
import cc.iqa.iquery.*;
public class SoloProperty implements IProperty {
public SoloProperty(String name, String value) {
this.name = name;
this.value = value;
}
private String name;
public String getName() {
return name;
}
private String value;
public String getValue() {
