com.avaje.ebeaninternal.server.el.ElPropertyChain Maven / Gradle / Ivy
package com.avaje.ebeaninternal.server.el;
import com.avaje.ebean.bean.EntityBean;
import com.avaje.ebean.text.StringParser;
import com.avaje.ebeaninternal.api.SpiExpressionRequest;
import com.avaje.ebeaninternal.server.deploy.BeanProperty;
import com.avaje.ebeaninternal.server.lib.util.StringHelper;
import com.avaje.ebeaninternal.server.query.SplitName;
import com.avaje.ebeaninternal.server.type.ScalarType;
import java.util.Arrays;
/**
* A ElGetValue based on a chain of properties.
*
* Used to get the value for an compound expression like customer.name or
* customer.shippingAddress.city etc.
*
*
* Note that if any element in the chain returns null, then null is returned and
* no further processing of the chain occurs.
*
*/
public class ElPropertyChain implements ElPropertyValue {
private final String prefix;
private final String placeHolder;
private final String placeHolderEncrypted;
private final String name;
private final String expression;
private final boolean containsMany;
private final ElPropertyValue[] chain;
private final boolean assocId;
private final int last;
private final BeanProperty lastBeanProperty;
private final ScalarType scalarType;
private final ElPropertyValue lastElPropertyValue;
public ElPropertyChain(boolean containsMany, boolean embedded, String expression, ElPropertyValue[] chain) {
this.containsMany = containsMany;
this.chain = chain;
this.expression = expression;
int dotPos = expression.lastIndexOf('.');
if (dotPos > -1) {
this.name = expression.substring(dotPos + 1);
if (embedded) {
int embPos = expression.lastIndexOf('.', dotPos - 1);
this.prefix = embPos == -1 ? null : expression.substring(0, embPos);
} else {
this.prefix = expression.substring(0, dotPos);
}
} else {
this.prefix = null;
this.name = expression;
}
this.assocId = chain[chain.length - 1].isAssocId();
this.last = chain.length - 1;
this.lastBeanProperty = chain[chain.length - 1].getBeanProperty();
if (lastBeanProperty != null) {
this.scalarType = lastBeanProperty.getScalarType();
} else {
// case for nested compound type (non-scalar)
this.scalarType = null;
}
this.lastElPropertyValue = chain[chain.length - 1];
this.placeHolder = getElPlaceHolder(prefix, lastElPropertyValue, false);
this.placeHolderEncrypted = getElPlaceHolder(prefix, lastElPropertyValue, true);
}
public String toString() {
return "expr:" + expression + " chain:" + Arrays.toString(chain);
}
private String getElPlaceHolder(String prefix, ElPropertyValue lastElPropertyValue, boolean encrypted) {
if (prefix == null) {
return lastElPropertyValue.getElPlaceholder(encrypted);
}
String el = lastElPropertyValue.getElPlaceholder(encrypted);
if (!el.contains("${}")) {
// typically a secondary table property
return StringHelper.replaceString(el, "${", "${" + prefix + ".");
} else {
return StringHelper.replaceString(el, ROOT_ELPREFIX, "${" + prefix + "}");
}
}
/**
* Return true if there is a many property from sinceProperty to
* the end of this chain.
*/
public boolean containsManySince(String sinceProperty) {
if (sinceProperty == null) {
return containsMany;
}
if (!expression.startsWith(sinceProperty)) {
return containsMany;
}
int i = 1 + SplitName.count(sinceProperty);
for (; i < chain.length; i++) {
if (chain[i].getBeanProperty().containsMany()) {
return true;
}
}
return false;
}
@Override
public boolean containsFormulaWithJoin() {
// Not cascading the check at this stage
return false;
}
public boolean containsMany() {
return containsMany;
}
public String getElPrefix() {
return prefix;
}
public String getName() {
return name;
}
public String getElName() {
return expression;
}
public String getElPlaceholder(boolean encrypted) {
return encrypted ? placeHolderEncrypted : placeHolder;
}
public boolean isDbEncrypted() {
return lastElPropertyValue.isDbEncrypted();
}
public boolean isLocalEncrypted() {
return lastElPropertyValue.isLocalEncrypted();
}
@Override
public String getAssocIsEmpty(SpiExpressionRequest request, String path) {
return lastElPropertyValue.getAssocIsEmpty(request, path);
}
public Object[] getAssocIdValues(EntityBean bean) {
// Don't navigate the object graph as bean
// is assumed to be the appropriate type
return lastElPropertyValue.getAssocIdValues(bean);
}
public String getAssocIdExpression(String prefix, String operator) {
return lastElPropertyValue.getAssocIdExpression(expression, operator);
}
public String getAssocIdInExpr(String prefix) {
return lastElPropertyValue.getAssocIdInExpr(prefix);
}
public String getAssocIdInValueExpr(int size) {
return lastElPropertyValue.getAssocIdInValueExpr(size);
}
@Override
public boolean isAssocMany() {
return lastElPropertyValue.isAssocMany();
}
public boolean isAssocId() {
return assocId;
}
public boolean isAssocProperty() {
for (int i = 0; i < chain.length; i++) {
if (chain[i].isAssocProperty()) {
return true;
}
}
return false;
}
public String getDbColumn() {
return lastElPropertyValue.getDbColumn();
}
public BeanProperty getBeanProperty() {
return lastBeanProperty;
}
public boolean isDateTimeCapable() {
return scalarType != null && scalarType.isDateTimeCapable();
}
public int getJdbcType() {
return scalarType == null ? 0 : scalarType.getJdbcType();
}
public Object parseDateTime(long systemTimeMillis) {
return scalarType.convertFromMillis(systemTimeMillis);
}
public StringParser getStringParser() {
return scalarType;
}
public Object convert(Object value) {
// just convert using the last one in the chain
return lastElPropertyValue.convert(value);
}
@Override
public Object pathGet(Object bean) {
for (int i = 0; i < chain.length; i++) {
bean = chain[i].pathGet(bean);
if (bean == null) {
return null;
}
}
return bean;
}
@Override
public Object pathGetNested(Object bean) {
Object prevBean = bean;
for (int i = 0; i < last; i++) {
// always return non null prevBean
prevBean = chain[i].pathGetNested(prevBean);
}
// try the last step in the chain
return chain[last].pathGet(prevBean);
}
@Override
public void pathSet(Object bean, Object value) {
Object prevBean = bean;
for (int i = 0; i < last; i++) {
prevBean = chain[i].pathGetNested(prevBean);
}
if (prevBean != null) {
if (lastBeanProperty != null) {
// last chain element maps to a real scalar property
lastBeanProperty.pathSet(prevBean, value);
} else {
// a non-scalar property of a Compound value object
lastElPropertyValue.pathSet(prevBean, value);
}
}
}
}