Application: gvSIG desktop » Library: org.gvsig.tools

package org.gvsig.tools.dynobject.impl;

import org.gvsig.tools.dataTypes.CoercionException;

import org.gvsig.tools.dynobject.DelegatedDynObject;

import org.gvsig.tools.dynobject.DynClass;

import org.gvsig.tools.dynobject.DynField;

import org.gvsig.tools.dynobject.DynMethod;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.dynobject.exception.DynFieldNotFoundException;

import org.gvsig.tools.dynobject.exception.DynMethodException;

import org.gvsig.tools.dynobject.exception.DynMethodNotSupportedException;

import org.gvsig.tools.dynobject.impl.DefaultDynClass.FieldAndIndex;

public class DefaultDynObject implements DelegatedDynObject {

        protected DefaultDynClass dynClass;

        protected Object[] values;

        protected DynObject[] delegateds;

        public DefaultDynObject(DynClass dynClass) {

                this.dynClass = (DefaultDynClass) dynClass;

                //                this.values = null;

                this.delegateds = null;

                this.values = this.dynClass.createValues(null);

        }

        public void implement(DynClass dynClass) {

                this.dynClass = (DefaultDynClass) ((DefaultDynObjectManager) ((DefaultDynClass) dynClass)

                                .getManager()).get(new DynClass[] { this.dynClass, dynClass });

                this.values = this.dynClass.createValues(this.values);

        }

        public Object getDynValue(String name) throws DynFieldNotFoundException {

                //                if( this.values == null ) {

                //                        this.values = this.dynClass.createValues(null);

                //                        return null;

                //                }

                FieldAndIndex x = dynClass.getDynFieldAndIndex(name);

                if (x != null) {

                        Object value = values[x.getIndex()];

                        if (value != null) {

//                                return x.getDynField().coerce(value);

                                return value;

                        }

                }

                if( delegateds != null ) {

                        for( int i=0; i<delegateds.length; i++) {

                                DynObject dynObj = delegateds[i];

                                if( dynObj.hasDynValue(name) ) {

                                        return dynObj.getDynValue(name);

                                }

                        }

                }

                if (x == null) {

                        throw new DynFieldNotFoundException(name, dynClass.getName());

                }

                return x.getDynField().getDefaultValue();

        }

        public void setDynValue(String name, Object value) throws DynFieldNotFoundException {

                //                if( this.values == null ) {

                //                        this.values = this.dynClass.createValues(null);

                //                }

                FieldAndIndex x = dynClass.getDynFieldAndIndex(name);

                if (x == null) {

                        throw new DynFieldNotFoundException(name,this.getDynClass().getName());

                }

                try {

                        values[x.getIndex()] = x.getDynField().coerce(value);

                } catch (CoercionException e) {

                        // FIXME: Need throw specific exception

                        throw new DynFieldNotFoundException(name, this.dynClass.getFullName());

                }

        }

        public boolean instanceOf(DynClass dynClass) {

                return dynClass.isInstance(this);

        }

        public DynClass getDynClass() {

                return this.dynClass;

        }

        public boolean hasDynValue(String name) {

                //                if( this.values == null ) {

                //                        this.values = this.dynClass.createValues(null);

                //                }

                int index = dynClass.getFieldIndex(name);

                if (index < 0 || this.values[index] == null) {

                        if (delegateds != null) {

                                for (int i = 0; i < delegateds.length; i++) {

                                        DynObject dynObj = delegateds[i];

                                        if (dynObj.hasDynValue(name)) {

                                                return true;

                                        }

                                }

                        }

                        return false;

                }

                return true;

        }

        public void delegate(DynObject dynObjects) {

                if( delegateds == null ) {

                        this.delegateds = new DynObject[1];

                        this.delegateds[0] = dynObjects;

                        return ;

                }

                DynObject[] newValues = new DynObject[this.delegateds.length + 1];

                System.arraycopy(delegateds, 0, newValues, 0, delegateds.length);

                newValues[delegateds.length] = dynObjects;

                this.delegateds = newValues;

        }

        public Object invokeDynMethod(String name, DynObject context) throws DynMethodException {

                throw new IllegalArgumentException("self required");

        }

        public Object invokeDynMethod(int code, DynObject context) throws DynMethodException {

                throw new IllegalArgumentException("self required");

        }

        public Object invokeDynMethod(Object self, String methodName,

                        DynObject context)throws DynMethodException {

                DynMethod method = this.dynClass.getDynMethod(methodName);

                if (method == null) {

                        if (delegateds != null) {

                                for (int i = 0; i < delegateds.length; i++) {

                                        try {

                                                return delegateds[i].invokeDynMethod(methodName,

                                                                context);

                                        } catch (DynMethodNotSupportedException e) {

                                                // continue next delegated

                                        }

                                }

                        }

                        throw new DynMethodNotSupportedException(methodName, self

                                        .getClass().getName());

                }

                return method.invoke(self, context);

        }

        public Object invokeDynMethod(Object self, int methodCode, DynObject context) throws DynMethodException {

                DynMethod method = this.dynClass.getDynMethod(methodCode);

                if (method == null) {

                        if (delegateds != null) {

                                for (int i = 0; i < delegateds.length; i++) {

                                        try {

                                                return delegateds[i].invokeDynMethod(methodCode,

                                                                context);

                                        } catch (DynMethodNotSupportedException e) {

                                                // continue next delegated

                                        }

                                }

                                throw new DynMethodNotSupportedException(methodCode, self

                                                .getClass().getName());

                        } else {

                                throw new DynMethodNotSupportedException(methodCode, self

                                                .getClass().getName());

                        }

                }

                return this.dynClass.manager.invokeDynMethod(self, methodCode, context);

        }

        public void clear() {

                DynField[] fields = getDynClass().getDeclaredDynFields();

                for (int i = 0; i < fields.length; i++) {

                        this.setDynValue(fields[i].getName(), fields[i].getDefaultValue());

                }

        }

        public String toString() {

                StringBuffer buffer = new StringBuffer();

                DynClass dynClass = getDynClass();

                buffer.append("DynClass name: ").append(dynClass.getName()).append(

                                "\nFields:");

                DynField[] fields = dynClass.getDeclaredDynFields();

                for (int i = 0; i < fields.length; i++) {

                        buffer.append("\n\t").append(fields[i].getName()).append(" = ")

                                        .append(getDynValue(fields[i].getName()));

                }

                return buffer.toString();

        }

}